NEWS
RELEASE I 22 JANUARY 2025
KASIYA - OPTIMISED PFS
RESULTS
OPTIMISED PFS COMPLETED WITH
OVERSIGHT FROM SOVEREIGN-RIO TINTO TECHNICAL
COMMITTEE
LARGEST AND LOWEST-COST
STRATEGIC CRITICAL MINERALS PRODUCER POTENTIAL
REAFFIRMED
SUPERIOR PROJECT DELIVERY,
OPERATIONAL FLEXIBILITY, PERMITTING, ENVIRONMENTAL AND SOCIAL
OUTCOMES
US$2.3Bn
NPV
(pre-tax)
|
US$16.4Bn
Total
Revenue
|
US$423/t
Operating
Cost
|
27%
IRR (pre-tax)
|
US$409M
Ave.
Annual EBITDA
|
US$665M
Capital
Expenditure
(to
1st Production)
|
"The level of accuracy and confidence in the economic and
technical fundamentals of Kasiya have taken a massive step forward.
The successful completion of large-scale field trials, in
particular for dry mining, the high degree of technical rigour by
our enhanced owner's team, and Rio Tinto's technical support have
all contributed to confirming Kasiya's potential to become a
long-life, low-cost, secure source of two genuine critical and
globally strategic minerals."
- Frank Eagar, Managing Director and
CEO
Sovereign Metals Limited (ASX:SVM;
AIM:SVML; OTCQX: SVMLF) (Sovereign or the Company) is pleased to announce the
results of an Optimised Pre-feasibility Study (OPFS) for its Kasiya Rutile-Graphite
Project (Kasiya or
the Project) undertaken
following a strategic investment by Rio Tinto Mining and
Exploration Limited (Rio
Tinto) in 2023, which established a joint Technical
Committee to advance the development of Kasiya.
Following input from various
organisations, including world-class consultancies, the Company's
owner's team, and subject matter experts from Rio Tinto, the OPFS
has reconfirmed Kasiya as a leading global future supplier of
strategic critical minerals outside of China.
The OPFS proposes
a large-scale, long-life operation to deliver
substantial volumes of natural rutile and graphite while generating
significant returns.
Table 1 summarises the key findings
from the OPFS and includes a comparison to the Pre-Feasibility
Study (PFS) results
released 16 months ago, in September 2023. It is important to note that the results for
the 2023 PFS in Table 1 have not been updated or adjusted for
inflation since their release in September 2023.
TABLE 1: KEY OPFS METRICS
|
|
|
|
|
Units
|
OPFS
Results
Jan 25
|
2023 PFS
Sep 23
|
Production
|
|
|
|
Initial Mine Life
|
Years
|
25
|
25
|
Plant Throughput (Stage 1: Years 1-4)
|
Mtpa
|
12
|
12
|
Plant Throughput (Stage 2: Years 5-25)
|
Mtpa
|
24
|
24
|
Average Annual Rutile Produced
(95%+TiO2)
|
ktpa
|
222
|
222
|
Annual Average Graphite Produced (96% TGC)*
|
ktpa
|
233
|
244
|
Operating and Capital Expenditure
|
|
|
|
Capex to First Production (Stage 1)
|
US$M
|
665
|
597
|
Total LOM Development Capex
|
US$M
|
1,127
|
1,250
|
Total LOM Sustaining Capex
|
US$M
|
397
|
470
|
Operating Costs (FOB Nacala)
|
US$/t
product
|
423
|
404
|
Financial Performance
|
|
|
|
Total Revenue*
|
US$M
|
16,367
|
16,121
|
Annual Revenue (Average LOM)
|
US$M
|
640
|
645
|
Annual EBITDA (Average LOM)
|
US$M
|
409
|
415
|
NPV8 (real, pre-tax)
|
US$M
|
2,322
|
2,419
|
IRR
(pre-tax)
|
%
|
27%
|
32%
|
Revenue to Cost Ratio
|
x
|
2.8
|
2.8
|
*Annual average graphite produced
includes 292kt of graphite processed and sold in two years post
cessation of active ore mining. Average graphite produced during
the 25-year initial mine life only is 240ktpa; total revenue during
the same period is US$15,990 million. All rutile is produced and
sold during the 25-year initial mine life. Note: All cashflows and
costs are presented in US$ real January 2025 terms unless otherwise
stated. Operating costs exclude mineral royalties and community
development support costs.
SUMMARY OF OPTIMISATIONS
The OPFS optimises seven key areas
compared to the 2023 PFS as summarised below.
Mining Method
The PFS proposed a 25-year initial
LOM based on a hydraulic mining process where slurry material would
be screened and pumped overland to processing plants.
Based on findings from the mining
trials undertaken as part of the Pilot Mining and Land
Rehabilitation (Pilot
Phase), the OPFS proposes a
large-scale open-pit dry mining operation using draglines
and trucking of material to the processing plants. The change in
mining method has not changed the initial mine life of 25
years.
The 2023 PFS envisaged mining would
take place on a contractor basis.
During the OPFS, Sovereign undertook
a trade-off analysis between the following operating
options:
·
Fully owner-operated mine with draglines and
trucks purchased by the owner
·
Owner-operated mine with draglines and trucks
leased by the owner
·
Mining contractor operation using excavators and
trucks
Due to the preference for draglines
and maintaining flexibility, an owner-operated mine with leased
equipment is selected as the preferred operating
model.
Dry mining Kasiya means the material
received at the plant is not pre-wet and pre-scrubbed. Therefore,
the OPFS proposes a process plant
front end consisting of two scrubbers and two oversize
screens per 12Mt plant. No further
changes are proposed to the processing plant flowsheet.
Per the 2023 PFS, mining would
commence in the southern area of the Kasiya deposit, ramping up to
12Mt per annum and then scaling up to 24Mt per annum in Year 5 by
constructing a second plant module in the same area, reaching
nameplate capacity by the end of the year.
In Year 10 of production, another
new 12Mt per annum plant module would be built and commissioned in
the northern area of Kasiya, supported by the relocation to the
north of one of the southern plants to maintain a steady state of
24Mt per annum.
However, the OPFS has determined the
most efficient plant locations to be an initial 12Mtpa South Kasiya plant followed by
the construction of another 12Mtpa North Kasiya plant in year
5 of production, negating any relocation requirements in
later years.
The OPFS maintains the ROM schedule
with operations commencing with 12Mt per annum of throughput during
the first four years of production (Stage 1) and expanding to 24Mt per
annum in year 5, with full capacity reached by end of year 5
(Stage 2).
Per the PFS, a conventional process
would be used to produce rutile and graphite concentrate with
tailings in separate sand and fines streams being pumped to a
conventional TSF. Mined out pit areas would be backfilled as part
of a rehabilitation process.
The OPFS proposes maximising backfilling of pits as
undertaken during the Pilot Phase and the introduction of mud farming on the TSF
to accelerate dewatering. This approach has reduced tailings
volumes in the TSF by 44% from 187
Mm³ to 105
Mm³.
Mud farming is a technique used by
Rio Tinto at operations such as its 100%-owned Weipa bauxite
operations in Queensland, Australia, which has been in production
since 1963 and produced 35.1Mt of bauxite in 2023.
The PFS proposed that the primary
water supply for the Kasiya mining complex would be created by building a dam and collecting run-off
water from the greater catchment area. Following the introduction of dry mining and mud farming, the
size of the water dam proposed in the PFS has been significantly
reduced, with less process water required and more process water
recovered.
The OPFS mining trials and material
deposition tests indicated a water demand of 10.2 Mm³ per annum,
almost a 40% decrease in water
requirement from the PFS (16.7 Mm³). The effect on the raw
water dam wall could be a reduction in volume from 0.79 Mm³ to 0.57
Mm³ and a reduction in dam wall height from 20 metres to 17
metres.
The 2023 PFS envisaged a hybrid
hydro-generated grid power plus solar power system
solution.
The Malawi grid reliability has
improved since completion of the PFS and is expected to further
improve considerably with the commissioning of the country's first
HV transmission interconnector to Mozambique in Q2 2025.
This will provide the Project with
sufficient power and therefore the OPFS proposes to connect the
Project's power system to the hydro-sourced grid network only. This
mitigates any risks associated with commissioning a new solar power
project and reducing the overall power tariff by eliminating the
need for an Independent Power Producer as per the 2023
PFS.
Figure 1:
Pilot Phase test pit during mining trials (left) and subsequently
backfilled (right)
OPTIMISATION MAINTAINS KASIYA'S GLOBAL LEADER
POTENTIAL
Kasiya, located in central Malawi,
is the world's largest
known natural rutile deposit and second-largest flake graphite
deposit.
Natural Rutile is the purest,
highest-grade form of naturally occurring titanium
feedstock.
Natural Graphite is required
for various technological and industrial applications.
Both titanium and graphite have been
designated "Critical Minerals" by the USA and the EU. In December
2024, NATO designated both titanium and graphite as
defence-critical, strategic minerals essential for the Allied
defence industry.
Over the 25-year LOM, Kasiya is set
to produce an average of 222kt of natural rutile and 233kt of
natural flake graphite per annum. At steady state throughput of 24
million tonnes of ore per annum the Project is anticipated to
produce approximately 246kt of natural rutile and 265kt of natural
graphite per annum, positioning Sovereign as potentially the
world's largest
producer of natural rutile and natural flake
graphite.
Further, the depletion of rutile
reserves at Lenoil Company Limited's Area 1 Mine1 in the
coming 2-3 years and the recent cessation of mining activities at
Energy Fuels Inc.'s Kwale Operations2 in Kenya means
that Sovereign could potentially become the world's only primary natural rutile
producer of scale (see Appendix 2).
The incremental cost of producing a
tonne of graphite from Kasiya under the OPFS is
US$241/t3. Based on public disclosures by listed
graphite companies that have undertaken project studies up to a
pre-feasibility stage or later, an incremental graphite cost of
production of US$241/t would make Sovereign the world's lowest-cost graphite producer
outside of China (see Appendix 3).
The rutile-graphite-rich
mineralisation will be extracted from surface and trucked to the
process plant front end to scrub and screen ROM before it enters a
Wet Concentration Plant (WCP) where a low-energy requirement,
chemical-free process using gravity spirals produces a Heavy
Mineral Concentrate (HMC).
The HMC is transferred to the dry Mineral Separation Plant
(MSP) where premium quality
rutile (+95% TiO2) is produced via electrostatic and
magnetic separation.
The high quality Kasiya rutile
product will be amenable for use in high-end titanium products
including aerospace and defence applications.
Graphite rich concentrate is
collected from the gravity spirals and processed in a separate
graphite flotation plant, producing a high purity, high
crystallinity and high value coarse-flake graphite
product.
1 In 2024, the previous owner of the Area 1 Mine, Sierra Rutlie
Limited, was acquired by Lenoil Company Limited, a private company
based in Sierra Leone.
2 In 2024, the previous owner of the Kwale Operations, Base
Resources Limited was acquired by Energy Fuels Inc., a US-based
uranium and critical minerals company.
3 Incremental cost of graphite production is calculated with the
following costs attributed to rutile production: all mining costs,
all G&A, all material handling costs except for graphitic fines
reclamation and graphite concentrate transport, and approximately
half of total processing costs. Incremental cost of graphite
production therefore includes only those costs incurred on top of
primary rutile production to produce an incremental tonne from the
process plant and transport the graphite to market. Unit cost of
rutile production under this scenario would be US$628/t (FOB
Nacala)).
Kasiya's graphite has been confirmed
to produce outstanding anode materials suitable for battery
production as well as demonstrating suitability for traditional
industrial uses such as the production of refractory
materials.
The Project has excellent
surrounding infrastructure including sealed roads, a high-quality
rail line connecting to the deep-water port of Nacala on the Indian
Ocean and hydro-sourced grid power. For the duration of the
operation, Kasiya's highly sought-after rutile and graphite
products will be railed directly from a purpose-built rail dry port
at the mine site eastward via the Nacala Logistics Corridor
(NLC) to the port of
Nacala. The southern port of Beira, connecting Kasiya via the
recently refurbished Sena Rail Line, offers a secondary export
route.
Enquiries
|
|
Frank Eagar, Managing Director & CEO
South Africa / Malawi
+27 21 065 1890
|
Sapan Ghai, CCO
London
+44 207 478 3900
|
Nominated Adviser on AIM and
Joint Broker
|
|
SP Angel Corporate Finance
LLP
|
+44 20 3470 0470
|
Ewan Leggat
Charlie Bouverat
|
|
|
|
Joint
Brokers
|
|
Stifel
|
+44 20 7710 7600
|
Varun Talwar
|
|
Ashton Clanfield
|
|
|
|
Berenberg
|
+44 20 3207 7800
|
Matthew Armitt
|
|
Jennifer Lee
|
|
|
|
Buchanan
|
+ 44 20 7466 5000
|
DISCLOSURES & DISCLAIMERS
Competent Person Statements
The information in this announcement
that relates to Production Targets and Ore Reserves is based on and
fairly represents information provided by Mr Frikkie Fourie, a
Competent Person, who is an Associate Member of The South African
Institute of Mining and Metallurgy and a Registered Professional
Engineer with the Engineering Council of South Africa, a Recognised
Professional Organisation' (RPO) included in a list promulgated by
ASX from time to time. Mr Fourie is employed by Moletech Consulting
Pty Ltd, an independent consulting company. Mr Fourie has
sufficient experience, which is relevant to the style of
mineralisation and type of deposit under consideration, and to the
to the activities undertaken, to qualify as a Competent Person as
defined in the 2012 Edition of the 'Australasian Code for Reporting
of Exploration Results, Mineral Resources and Ore Reserves'. Mr
Fourie consents to the inclusion in the Announcement of the matters
based on his information in the form and context in which it
appears.
The information in this announcement
that relates to Infrastructure, Capital and Operating Costs and
process engineering fairly represents information compiled or reviewed by Mr James
Gemmel, a Competent Person, who is a who is a Registered
Professional Engineer with the Engineering Council of South Africa,
a RPO included in a list promulgated by ASX from time to time. Mr
Gemmel is employed by DRA Limited, an independent consulting
company. Mr Gemmal has sufficient experience, which is relevant to
the style of mineralisation and type of deposit under
consideration, and to the activities undertaken, to qualify as a
Competent Person as defined in the 2012 Edition of the
'Australasian Code for Reporting of Exploration Results, Mineral
Resources and Ore Reserves'. Mr Gemmel consents to the inclusion in
the Announcement of the matters based on his information in the
form and context in which it appears.
The information in this announcement
that relates to Metallurgy - rutile and graphite is extracted from
announcements dated 28 September 2023, 8 May 2024, 15 May 2024 and
4 September 2024, which are available to view at
www.sovereignmetals.com.au. Sovereign confirms that a) it is not
aware of any new information or data that materially affects the
information included in the original announcement; b) all material
assumptions included in the original announcement continue to apply
and have not materially changed; and c) the form and context in
which the relevant Competent Persons' findings are presented in
this report have not been materially changed from the
announcement.
The information in this announcement
that relates to the Mineral Resource Estimate is extracted from
Sovereign's 2024 Annual Report and is based on, and fairly
represents information compiled by Mr Richard Stockwell, a
Competent Person, who is a fellow of the Australian Institute of
Geoscientists (AIG). Mr Stockwell is a principal of Placer
Consulting Pty Ltd, an independent consulting company. Sovereign
confirms that a) it is not aware of any new information or data
that materially affects the information included in the original
announcement; b) all material assumptions included in the 2024
Annual Report continue to apply and have not materially changed;
and c) the form and context in which the relevant Competent
Persons' findings are presented in 2024 Annual Report have not been
materially changed from the disclosure in the 2024 Annual
Report.
Qualified Person
Information disclosed in this
announcement has been reviewed by Dr Julian Stephens (B.Sc (Hons),
PhD, MAIG), Director, a Qualified Person for the purposes of the
AIM Rules for Companies.
Forward Looking Statement
This release may include
forward-looking statements, which may be identified by words such
as "expects", "anticipates", "believes", "projects", "plans", and
similar expressions. These forward-looking statements are based on
Sovereign's expectations and beliefs concerning future events.
Forward looking statements are necessarily subject to risks,
uncertainties and other factors, many of which are outside the
control of Sovereign, which could cause actual results to differ
materially from such statements. There can be no assurance that
forward-looking statements will prove to be correct. Sovereign
makes no undertaking to subsequently update or revise the
forward-looking statements made in this release, to reflect the
circumstances or events after the date of that release.
The information contained within
this announcement is deemed by the Company to constitute inside
information as stipulated under the Market Abuse Regulations (EU)
No. 596/2014 as it forms part of UK domestic law by virtue of the
European Union (Withdrawal) Act 2018 ('MAR'). Upon the publication
of this announcement via Regulatory Information Service ('RIS'),
this inside information is now considered to be in the public
domain.
To view this announcement in full,
including the summary section of the OPFS and all images and
figures, please refer to
https://api.investi.com.au/api/announcements/svm/3b41394f-65e.pdf.
SUMMARY OF MATERIAL ASSUMPTIONS
Material assumptions used in the
estimation of the production target and associated financial
information are set out in the following table.
TABLE 13: ASSUMPTIONS
|
|
|
|
Assumption
|
Inputs
|
Maximum accuracy variation - Capital costs
|
-20%/+25%
|
Maximum accuracy variation - Operating costs
|
-20%/+25%
|
Minimum Life of Mine
|
25
years
|
Annual average throughput (tonnes) - Stage 1
|
12,000,000
|
Annual average throughput (tonnes) - Stage 2
|
24,000,000
|
Head
grade - rutile
|
1.03%
|
Recovery - rutile
|
100%
|
Product grade (TiO2) - rutile
|
96%
|
Head
grade - graphite
|
1.66%
|
Recovery - graphite
|
67.5%
|
Product grade (TGC) - graphite
|
96%
|
Annual production (average LoM) - rutile
(tonnes)
|
222,000
|
Annual production (average LoM) - graphite
(tonnes)
|
233,000
|
Sales Price - rutile (average LoM)
|
US$1,490/t
|
Sales Price - graphite (average LoM)
|
US$1,290/t
|
Government Royalty
|
5% of
gross revenue
|
Vendor Royalty
|
2% of
gross profit
|
Community Development Fund
|
0.45% of
gross revenue
|
Stage 1 Capital (12Mtpa South
Plant)
|
US$665m
|
Stage 2 Capital (12Mtpa North
Plant)
|
US$462m
|
Sustaining Capital
|
US$397m
|
Operating Costs excluding royalties (LoM) - FOB
Nacala
|
US$423/t
|
Operating Costs including royalties (LoM) - FOB
Nacala
|
US$493/t
|
Discount Rate
|
8%
|
ORE
RESERVE STATEMENT
As part of the PFS, an initial
Probable Ore Reserve of 538Mt was declared at Kasiya, in accordance
with the guidelines of the JORC Code 2012.
As part of the OPFS, a review of the
Ore Reserve was completed, taking into account the optimised
sections of the OPFS including mining method, operating model,
plant configuration and locations, capital and operating costs, and
updated financial model. The findings and learning during the Pilot
Phase were also considered. As a result of this review, the Ore
Reserve at Kasiya remains unchanged.
The current Kasiya MRE was used as
the basis for the OPFS Ore Reserve estimate. Mineral Resources were
converted to Ore Reserves in line with the material classifications
which reflect the level of confidence within the resource estimate.
The Ore Reserve reflects that portion of the Mineral Resource which
can be economically extracted by open pits utilising dry mining
methodologies. The Ore Reserve considers the Modifying Factors and
other parameters detailed in the relevant sections of the OPFS
report, including but not limited to the mining, metallurgical,
social, environmental, approvals, tenure, statutory and financial
aspects of the Project.
In line with the JORC 2012
guidelines, the Kasiya Probable Ore Reserve is based on Indicated
classified Mineral Resources. There is no Measured classified
Mineral Resource at Kasiya and consequently no Proved Ore
Reserve.
The reported MRE is inclusive of the
Ore Reserve.
The Ore Reserve includes an
allowance for mining dilution and ore loss on the basis that all
material within the shell is classified and extracted as
ore.
The open pit geometries developed
for the purposes of mine planning, and which define the subsequent
Ore Reserve, are based on Whittle pit shells edited to comply with
practical mining requirements and identified exclusion
zones.
The information that relates to Ore
Reserves for the OPFS was reviewed and compiled by Mr
Frikkie Fourie who
takes overall responsibility for the Ore Reserve as Competent
Person (see Competent Persons Statement above). Mr
Fourie is
Associate Member of The South African Institute of
Mining and Metallurgy and a Registered Professional Engineer with
the Engineering Council of South Africa, and has sufficient experience, which is relevant to the style
of mineralisation and type of deposit under consideration, and to
the activity he is undertaking, to qualify as Competent Person in
terms of the JORC (2012 Edition).
A site visit has been undertaken by
Mr Fourie who also oversaw excavation of
the trial mining pit as part of the Pilot
Phase.
The Ore Reserve estimate is
summarised in Table 14 below, along with the associated cut-off
grade used to define the shell.
Table 14: Ore Reserve for the Kasiya Deposit
|
Classification
|
Tonnes
(Mt)
|
Rutile
Grade
(%)
|
Contained
Rutile
(Mt)
|
Graphite
Grade
(TGC, %)
|
Contained
Graphite
(Mt)
|
Proved
|
-
|
-
|
-
|
-
|
-
|
Probable
|
538
|
1.03%
|
5.5
|
1.66%
|
8.9
|
Total
|
538
|
1.03%
|
5.5
|
1.66%
|
8.9
|
Pit
Optimisation
An open pit optimisation utilising
Whittle™ software was carried out on the Kasiya deposit using
Indicated Mineral Resources only (in line with the JORC 2012
guidelines). The latest parameters available were used to determine
the economic extent of the open pit excavation. The process plant
production parameters were supplied by Sovereign with an initial
rate of 12Mtpa and a ramp up in production in year 5 to annual rate
of 24Mtpa by the beginning of year 6.
Whilst dry mining lends itself to a
selective mining approach, the basis of the OPFS is a bulk mining
operation and therefore, all material within the "shell" will be
extracted and fed to the plant as ore and any interstitial waste
and/or sub-economic grade material will be likewise treated as
diluent material. However, due to the relatively homogenous and
continuous nature the orebody, the quantities of this material will
be relatively small and therefore a simple 5% dilution was applied
within the Whittle™ tool to approximate this assumption.
For the production schedule on which
the Ore Reserve is based all material within the shell was treated
as "ore" to ensure the appropriate dilution was
captured.
Mineable Pit Geometries
Based on the cut-off grades applied
the mining areas was further interrogated to determine the
potential recoverable mining inventory. The interrogation process
applied the following constraints to determine the bulk mining
boundaries:
·
A minimum depth of 5m.
· Pit extents limited to mineable areas and to remain outside of
identified exclusion areas wherever reasonably possible. Sovereign
identified all local village areas and areas of cultural or
environmental significance within the potential mining envelope
that should not be disturbed during the mining phase of the
Project.
MODIFYING FACTORS
The Modifying Factors included in
the JORC Code (2012) have been assessed as part of the Optimised
Pre-Feasibility Study (OPFS), including mining,
processing, metallurgical, infrastructure, economic, marketing,
legal, environmental, social and government factors. The Company
has received advice from appropriate experts when assessing each
Modifying Factor.
A summary assessment of each
relevant Modifying Factor is provided below.
Mining - refer to section
entitled 'Mining' in the Announcement.
For The OPFS, the Company engaged
independent consultants, DRA Limited, Fraser Alexander and Moletech
to carry out and determine the pit optimisations, mine design,
scheduling, mining cost estimation, updated production schedules
and Ore Reserves.
During the second half of 2024,
trial mining was successfully completed as part of
Pilot Phase at Kasiya. As part of the Pilot Phase,
a dry mining trial confirmed Kasiya can be efficiently mined to
depth using standard mobile excavators and trucks. Following
completion and results of the Pilot Phase and dry mining
trial, the proposed mining method for the
Study is dry mining using draglines. The Pilot Phase provided
significant insight and real mining data as
the test pit, which was excavated using conventional dry mining
techniques and a simple mobile excavator fleet, covered an area of
120 metres by 110 metres, was mined to a depth of 20 metres through
the weathered ore at Kasiya. Dry mining is
considered appropriate, safe, low-risk and operationally flexible
for this style of shallow, soft and friable saprolite-hosted rutile
and graphite mineralisation. Dry mining is used across numerous
at-surface mining operations globally and is well suited for the
Kasiya style of mineralisation, as evidenced in the Pilot Phase dry
mining trial.
Metallurgy and Processing -
refer to section entitled 'Processing and Metallurgy' in the
Announcement.
Rutile
The Company completed bulk rutile
testwork programs at the globally recognised AML in Perth,
Australia. Testwork programs are supervised by Sovereign's Head of
Development, Paul Marcos. Mr Marcos is a metallurgist and process
engineer and a mineral sands industry veteran. Bulk test-work
programs have confirmed premium grade rutile can be produced via a
simple and conventional process flow sheet.
All the Rutile metallurgical and
processing design and performance assumptions of the PFS were
carried through to the OPFS and remained unchanged.
Processing engineering was completed
by DRA Limited who developed the process plant design and
associated cost estimate for the OPFS. An average product grade of
95% TiO2 and 100% recovery to product factor has been
applied.
Graphite
The Company has conducted graphite
testwork across ALS Laboratory in Perth, SGS Lakefield in Canada
and ProGraphite GmbH in Germany.
DRA's Senior Engineer, Stewart
Calder and Manager Metallurgy, John Fleay supervised and advised on
sample selection, testwork scope and results from the latest
testwork programs. Both consultants are considered to have the
appropriate capabilities and similarities with the material and the
early stage of the project.
Processing engineering was completed
by DRA Limited who developed the process plant design and
associated cost estimates for the PFS. Overall average graphite
recovery applied in the model was 67.5%. Gravity recovery
ranges between 73.6% to 86.2%, averaging 77.9% and flotation plant
recovery ranges between 89.2% and 96.1%, averaging 91.4%. Total
Graphite (TGC) recovery average is 72.5%. Overall concentrate
grades average 96% C(t) with over 57% of the graphite flake product
being larger than 180µm.
All the graphite metallurgical and
processing design and performance assumptions of the PFS were
carried through to the OPFS and remained unchanged.
Rutile & Graphite
It is acknowledged that laboratory
scale test-work will not always represent actual results achieved
from a production plant in terms of grade, chemistry, sizing and
recovery. Further test-work will be required to gain additional
confidence on specifications and recoveries that will be achieved
at full-scale production.
Overall, the process flow-sheet is
conventional for both rutile and graphite with no novel features or
equipment incorporated.
Infrastructure - refer to
sections entitled 'Infrastructure', and 'Transport and
Logistics' in the Announcement.
The indicated resource for the
Kasiya Rutile Project is immediately proximate to the township of
Kasiya, which is approximately 30 km to the northwest of Lilongwe
(direct line) and about 45 km by existing roads. The proximity to
Lilongwe gives the project a number of benefits, including access
to a large pool of professionals and skilled tradespeople, as well
as industrial services.
Logistics cost estimates, including
rail and port infrastructure and handling, were provided by Thelo
DB, Nacala Logistics and Grindrod based on market data, suppliers'
quotations, industry databases, industry contacts and consultants'
existing knowledge of southern African transport infrastructure and
freight markets. All consultants are independent with substantial
experience in the management of transport logistics studies in
southern Africa.
Marketing - refer to sections
entitled 'Rutile Market' and Graphite Market' in the
Announcement.
Rutile
During the PFS, the Company engaged
TZMI to provide a bespoke marketing report to support the PFS and
engaged them again for the OPFS to update the rutile price. TZMI is
a global, independent consulting and publishing company which
specialises in technical, strategic and commercial analyses of the
opaque (non-terminal market) mineral, chemical and metal
sectors.
TZMI's assessment has confirmed that
global demand and supply forecasts for natural rutile, and with
reference to the specific attributes of Kasiya, there is a
reasonable expectation that the product will be able to be sold
into existing and future rutile markets.
Since July 2023, leading global mining company Rio Tinto has made an
investment in Sovereign for A$60 million
resulting in a shareholding of 19.9%. Rio
Tinto is a global leader in titanium feedstock production and is
set to produce 1.0 to 1.2 Mt of TiO2 products in 2025
according to company guidance, giving it a 14% market
share.
Under an Investment Agreement, Rio
Tinto has been providing assistance and advice on technical and
marketing aspects of Kasiya as part of the Sovereign-Rio Tinto
technical committee. Also, included under the Investment Agreement,
Rio Tinto has the option to become the operator of Kasiya on
commercial arm's-length terms.
In the event, Rio Tinto elects to
become the operator of Kasiya, and for so
long as Rio Tinto remain the operator, Rio Tinto shall have exclusive marketing rights to 40% of the
annual production of all products from the Project as identified in
the DFS on arm's-length terms.
Rio Tinto's option over operatorship
and 40% marketing rights lapse if not exercised by the earlier of
(i) 90 days after the Company announces its DFS results or 180 days
after the announcement of the DFS if Rio Tinto's advises it needs
additional time to consider the exercise of its option to become
operator or (ii) Rio Tinto ceasing to hold voting power in the
Company of at least 10%.
Graphite
The Company engaged Fastmarkets, a
specialist international publisher and information provider for the
global steel, non-ferrous and industrial minerals markets, to
prepare a marketing report for graphite.
Fastmarkets' assessment has
confirmed that global demand and supply forecasts for natural flake
graphite, and with reference to the specific attributes of
Sovereign's project, there is a reasonable expectation that the
product from Sovereign's Kasiya project will be able to be sold
into existing and future graphite markets. Given the extremely
low-cost profile and high-quality product, it is expected that
output from Kasiya will be able to fill new demand or substitute
existing lower quality / higher cost supply.
Project considerations taken by
Fastmarkets in forming an opinion about the marketability of
product include:
·
Low capital costs (incremental)
·
Low operating costs
·
High quality concentrate specifications
Industry participants confirm that
the highest value graphite concentrates remain the large, jumbo and
super-jumbo flake fractions, primarily used in industrial
applications such as refractories, foundries and expandable
products. These sectors currently make up the significant majority
of total global natural flake graphite market by value.
Fastmarkets have formed their
opinion based solely upon project information provided by Sovereign
Metals to Fastmarkets and have not conducted any independent
analysis or due diligence on the information provided.
As noted above, Rio Tinto have made
a A$60 million investment in Sovereign and own 19.9% of the
Company. Since 2023, Sovereign and Rio Tinto have been working
together to qualify Kasiya's graphite product with a particular
focus on supplying the spherical purified graphite segment of the
lithium-ion battery anode market. Rio Tinto has set up a battery
materials business in 2021, including its announced plans to set up
a battery testing plant in Melbourne, Australia.
In September 2024, Sovereign
announced an update on the downstream testwork which demonstrated
that Coated Spherical Purified Graphite (CSPG) produced from Kasiya
natural flake graphite has performance characteristics comparable
to the leading Chinese natural graphite anode materials
manufacturers such as BTR New Material Group (BTR). Electrochemical testing of the
CSPG samples at a leading German institute achieved first cycle
efficiencies (FCE) of 94.2%
to 95.8%, with results above 95%, a key specification for highest
quality natural graphite anode materials under the Chinese
standard.
BTR has a 20-year track record in
the production of lithium-ion battery anode materials, is a
dominant player in the market and has recently concluded anode
material offtake agreements with global automotive companies
including Ford. BTR's highest specification CSPG materials, that
have low swelling, long cycle life, good processability and
outstanding electrochemical performance include their GSN17 and
LSG17 products (with D50 of 17.0+/- 1.5μm).
Economic - also refer to
sections entitled 'Cost Estimations' and 'Financial & Economic
Analysis' in the Announcement.
Capital estimates for the process
plant have been prepared by PCC, together with input from DRA
Limited, the Company and other contributing consultants using
combinations of cost estimates from suppliers, historical data,
benchmarks and other independent sources. The accuracy of the
initial capital cost estimate for the Project is
-20%/+25%.
Capital costs include the cost of
all services, direct costs, contractor indirects, EPCM expenses,
non-process infrastructure, sustaining capital and other facilities
used for the mine. Capital costs make provision for mitigation
expenses and mine closure and environmental costs.
Working capital requirements
(including contingency) for plant commissioning and full ramp-up
have been included in the headline capital estimate reported under
construction, owner's and start-up costs.
Mining costs have been estimated by
DRA GIobal, an independent Mining EPCM and Engineering consulting
company. Mining costs have been built up from first principles
based on equipment, vendor, and contractor quotations, local unit
cost rates, and benchmarked costs.
Labor costs have been developed
based on a first-principles build-up of staffing requirements with
labour rates benchmarked in Malawi and expatriate rates benchmarked
for professionals from South Africa and other
jurisdictions.
A Government royalty of 5% (applied
to revenue) and a vendor profit share of 2% (applied to gross
profit) have been included in all project economics. A 0.45%
royalty (applied to revenue) has been applied for the community
development fund.
Rehabilitation and mine closure
costs are included within the reported capital and operating cost
figures.
A detailed financial model and
discounted cash flow (DCF) analysis has been built and prepared by an independent
specialist mining financial modelling firm, Practara
(Practara), using inputs from
various expert consultants in order to demonstrate the economic
viability of the Project. The financial model and DCF were modelled
with conservative inputs to provide management with a baseline
valuation of the Project.
The DCF analysis demonstrated
compelling economics of the prospective Project, with an NPV
(ungeared, pre-tax, at an 8% discount rate) of US$2,322
million, and an (ungeared) IRR of 27%.
Sensitivity analysis was performed
on all key assumptions used. The robust project economics insulate
the Kasiya Project from variation in market pricing, capital
expense, or operating expenses. With both rutile and graphite
concentrate prices simultaneously 25% lower than the OPFS prices,
the Project still displays a positive NPV (ungeared, pre-tax, 8%
discount rate) of US$1,079 million and pre-tax IRR of
18%.
Sovereign estimates the total
capital cost to construct the mine to be US$665m (which includes a
contingency of 16% of direct and indirect costs).
Key parameters are disclosed in the
body of the announcement, and include:
·
Life of Mine: 25 years
·
Discount rate: 8%
·
Royalty rate: 5% royalty (Government), 2% of gross
profit (Original Project Vendor) and 0.45% Community Development
Fund.
·
Pricing: Rutile average price of US$1,490 per
tonne and Graphite average basket price of US$1,290 per
tonne
There is uncertainty in the tax law
applicable to mining companies in Malawi. The 2023 PFS assumed a
30% corporate income tax rate and a resource rent tax (RRT) equating to 15% of post-tax
profits.
In 2024, mining companies Lotus and
Mkango entered into fiscal stability agreements known as MDA with
the Government of Malawi. In both the Lotus and Mkango MDAs, it was
agreed that no RRT shall be payable until such time that the
Government of Malawi completed a review of the relevant
legislation. As such, and until such time Sovereign has sight of
what actual fiscal terms would apply to the Kasiya Project, results
for the OPFS have been reported on a pre-tax basis only.
Applying a 30% corporate income tax
rate and a range of RRT from 15% to 0% would result in post-tax NPV
at an 8% discount rate of US$1,284 million to US1,557
million.
The financial model has been built
and prepared by Practara using inputs from the various expert
consultants and has been reviewed by SP Angel Corporate Finance
LLP, the Company's Nominated Advisor and Corporate Broker as
defined by the AIM Rules for Companies set out by the London Stock
Exchange, to validate the functionality and accuracy of the
model.
The Company engaged the services of
advisory firm, Argonaut PCF Limited (Argonaut), with regards to
project economics. Argonaut is a financial advisory firm that
offers full-service advisory, stockbroking and research, which
specialises in the resources sector. Argonaut is well regarded as a
specialist capital markets service provider and has raised project
development funding for companies across a range of commodities
including the industrial and speciality minerals sector.
Following the assessment of a number
of key criteria, Argonaut has confirmed that, on the basis of
continued support from Rio Tinto, that a DFS arrives at a result
that is not materially negatively different than the OPFS, all
in-country government and regulatory approvals are received,
commercial offtake agreements are in place for the majority of
rutile and graphite production for at least the first five years of
mine life, and that there has not been any material adverse change
in financial condition, results of operations, or business
prospects of the Company, or any material adverse changes in global
financial markets in general, Sovereign should be able to secure
necessary financing for the development of the Project.
Since July 2023, leading global mining company Rio Tinto has made an
investment in Sovereign for A$60 million
resulting in a shareholding of 19.9%. The investment proceeds are
being used to advance Kasiya and represent a significant step
towards unlocking the Project as a major new supplier of natural
rutile and flake graphite. Under the Investment Agreement with Rio
Tinto, it has been agreed with Rio Tinto that if Sovereign is
raising debt finance for the development of the Project, Sovereign
and Rio Tinto will negotiate, in good faith, financing arrangements
in order to put in place an acceptable mine construction funding
package. Further, Rio Tinto has a right of first refusal on equity
raisings that if the Company undertakes equity raisings (other than
pursuant to a pro rata entitlement offer), Rio Tinto has a right to
be consulted and a right of first refusal to participate in the
equity raisings up to a level where Rio Tinto's aggregate voting
power does not exceed 19.9%.
Since initial exploration of the
Kasiya Project in November 2019, the Company has completed
extensive drilling, sampling, metallurgical test-work, geological
modelling and defined an Indicated and Inferred Mineral Resource
Estimate which was converted to Ore Reserves as part of the
September 2023 PFS and underpins this OPFS. Over this period, with
these key milestones being attained and the Project de-risked, the
Company's market capitalisation has increased from approximately
A$18m to over A$450m. As the Project continues to achieve key
milestones, which can also be significant de-risking events, the
Company's share price could be anticipated to increase.
The Company has an uncomplicated,
clean corporate and capital structure, is debt free and is in a
strong financial position, with approximately A$34 million cash on
hand (31 December 2024(unaudited)). The current financial position
means the Company is soundly funded to continue into a DFS phase to
further develop and de-risk the Project.
The Company's shares are listed on
the ASX and AIM which are premier markets for growth companies and
provide increased access to capital from institutional and retail
investors in Australia and the UK. The Company's shares are also
quoted on the OTCQX and Frankfurt Stock Exchange.
Sovereign has a strong track record
of successfully raising equity funds for Kasiya plus it has an
experienced and high-quality Board and management team comprising
highly respected resource executives with extensive technical,
financial, commercial and capital markets experience. The directors
have previously raised more than A$2.5 billion from capital markets
for a number of exploration and development companies.
As a result, the Board has a high
level of confidence that the Project will be able to secure funding
in due course, having particular regard to:
1. Required
capital expenditure;
2. Sovereign's
strategic partner relationship with Rio Tinto;
3. Sovereign's
market capitalisation;
4. Recent
funding activities by directors in respect of other resource
projects;
5. Recently
completed funding arrangements;
6. The range
of potential funding options available;
7. The
favourable key metrics generated by the Kasiya Project;
8. Ongoing
discussions for potential offtake agreements;
9. Investor
interest to date;
10. the Company owns 100%
of Kasiya which is highly attractive to potential
financiers;
11. the OPFS demonstrates
that the Project is commercially viable and provides justification
to progress to DFS stage.
Environmental, Social, Legal and Governmental
- refer to section entitled 'Environmental and
Social Impact' in the Announcement.
Sovereign is committed to conduct
its activities in full compliance to the requirements of national
regulations, its obligations under international conventions and
treaties and giving due consideration to international best
practices and policies. The Company has appointed an experienced
environmental consultant to manage the ESIA process, and
environmental and social baseline studies have commenced with
appropriately qualified independent experts.
The Company has also completed a
high-level risk assessment to identify major environmental and
social risks which could affect the development of the Project,
along with mitigating strategies to allow identified risks to be
addressed early in the project design phase.
The Company has embarked on several
community engagement exercises in the area and there is a general
positive acceptance of the Project. Social responsibility/RAP costs
totalling US$97m have been included in this OPFS, as well as a
0.45% revenue royalty for the community development
fund.
Based on the current assessments and
commenced ESIA, the Company believes there are no environmental
issues currently identified that cannot be appropriately mitigated
in accordance with standard practices adopted for the development
of mining projects.
Subject to further positive
technical studies, Sovereign intends to apply for a Mining Licence
(ML) to secure mineral deposits
for mining. Under the Mines Act there are certain requirements,
milestones and approvals required prior to submission of a ML
application. At this point of Kasiya's development, the Company
notes no known issues or impediments obtaining a ML under normal
course of business.
Under the Mines and Minerals Act
(2023)(Mines Act), the Government of
Malawi has a right to equity ownership for large-scale mining
licences (>5Mt mined per annum or >US$250m Capex) with the
right a negotiation matter, likely as part of any future MDA. The
Mkango and Lotus MDAs included a 10% non-diluting equity interest to the Malawi
Government.
In a Press Release issued on 20 July
2023, the Government of Malawi publicly applauded the timely
investment by Rio Tinto and marked it as a milestone towards
realising the country's aspirations of growing the mining industry
as promoted in the Malawi Vision 2063, which identifies mining as a
priority industry. The Malawi Mines department has also set up a
technical working group, with resources dedicated to the Kasiya
Project to ensure its continual progress and
development.
The Government's statement and
actions confirms its commitment to ensuring the growth of the
mining sector through deliberate initiatives aiming at establishing
a conducive investment environment in the sector.
Following successful completion of
the mining trials stage at the Pilot Phase, the test pit mined at Kasiya has been successfully backfilled
which has allowed Sovereign to commence with on-site soil
remediation and land rehabilitation activities, testing our
proposed rehabilitation approach and demonstrating that the mined
land can support sustainable farming post-closure.
During the Pilot Phase mining
trials, 170,000m3 was mined using a conventional
excavator fleet. The fleet was then used to place mined material
back into the pit, filling the pit to the original ground level in
less than two months and ahead of schedule.
The rehabilitation approach has been
based on agronomic principles, including promoting sustainable
farming practices and providing various end-land uses.
Rehabilitation is underway through a five-step process:
Step 1: Introduce Lime
The land rehabilitation
demonstration commenced with the application and incorporation of
locally sourced dolomitic lime (calcium and
calcium-magnesium-carbonate) to improve naturally low PH
levels.
Step 2: Introduce Carbon and Basic Nutrients
Sovereign is augmenting the mined
area with organic carbon and basic nutrients to support
post-closure farming. The Company is testing the application of
biochar (to provide carbon) and fertiliser (in the form of potash
(MOP), phosphate
(MAP) and a blend of nitrogen,
potash, and sulphur (NPK) 15:23:16).
Step 3: Grading, Ripping and Discing
Lime, biochar, and fertiliser are
incorporated into the soil through grading, ripping, and discing
using graders and locally sourced farming equipment. This ensures
the land is level and safe and that essential inputs are
incorporated into the soil.
Step 4: Planting of Rehabilitation Crops
In December 2024 and January 2025,
Sovereign has planted rehabilitation crops to maximise the benefit
of the coming summer rainfall. Giant bamboo has been introduced in
4 by 8-metre blocks and will act as the primary crop to enhance
carbon and bioactivity in the remediated soils. To return the land
to farmers, maize and other cover crops will be intercropped
between the giant bamboo in formalised farm blocks.
Step 5: Monitoring and Evaluation
Sovereign will monitor soil
remediation, plant growth and crop yields. As part of stakeholder
engagement, the Company will work with local farmers to improve
results through conservation farming, composting operations,
testing new seed varieties and establishing an indigenous, fruit
and farming nursery. This will serve as a live demonstration of
rehabilitation and timely return of land to pre-mining
use.
APPENDIX 1 - JORC CODE, 2012 EDITION - TABLE
1
Section 1 - Sampling Techniques and Data
Criteria
|
JORC Code
explanation
|
Commentary
|
Sampling
Techniques
|
Nature and quality of sampling (e.g. cut channels, random
chips, or specific specialised industry standard measurement tools
appropriate to the minerals under investigation, such as down hole
gamma sondes, or handheld XRF instruments, etc). These examples
should not be taken as limiting the broad meaning of
sampling.
|
Hand Auger (HA) samples are composited based on
regolith boundaries and sample chemistry generated by hand-held XRF
(pXRF). Each 1m of sample
is dried and riffle-split to generate a total sample weight of 3kg
for analysis, generally at 2 - 5m intervals. This primary sample is
then split again to create a 3kg composite to provide a 1.5kg
sample for both rutile and graphite analyses.
Infill Push-Tube (PT) core drilling is sampled routinely
at 2m intervals by compositing dried and riffle-split half core. A
consistent, 1.5kg sample is generated for both the rutile and
graphite determination.
Air-Core (AC) samples are composited based on
expertly logged regolith boundaries. Each 1m of sample is dried and
riffle-split to generate a total sample weight of 3kg for analysis,
generally at 2m intervals. This primary sample is then split again
to provide a 1.5kg sample for both rutile and graphite
analyses.
|
Include reference to measures taken to ensure sample
representivity and the appropriate calibration of any measurement
tools or systems used.
|
Drilling and sampling activities are
supervised by a suitably qualified company geologist who is present
at all times. All drill samples are geologically logged by the
geologist at the drill site/core yard.
Each sample is sun dried and
homogenised. Sub-samples are carefully riffle split to ensure
representivity. The 1.5kg composite samples are then
processed.
An equivalent mass is taken from
each sample to make up the composite. A calibration schedule is in
place for laboratory scales, sieves and field XRF
equipment.
Placer Consulting Pty Ltd
(Placer) Resource
Geologists have reviewed Standard Operating Procedures
(SOPs) for the collection
and processing of drill samples and found them to be fit for
purpose and support the resource classifications as applied to
theMRE. The primary composite sample is considered representative
for this style of rutile mineralisation.
|
Aspects of the determination of mineralisation that are
Material to the Public Report. In cases where 'industry standard'
work has been done this would be relatively simple (e.g. 'reverse
circulation drilling was used to obtain 1 m samples from which 3 kg
was pulverised to produce a 30 g charge for fire assay'). In other
cases more explanation may be required, such as where there is
coarse gold that has inherent sampling problems. Unusual
commodities or mineralisation types (e.g. submarine nodules) may
warrant disclosure of detailed information.
|
Logged mineralogy percentages,
lithology/regolith information and TiO2% obtained from
pXRF are used to assist in determining compositing intervals. Care
is taken to ensure that only samples with similar geological
characteristics are composited together.
|
Drilling
Techniques
|
Drill type (e.g. core, reverse circulation,
open‐hole hammer, rotary air blast, auger, Bangka, sonic, etc) and
details (e.g. core diameter, triple or standard tube, depth of
diamond tails, face‐sampling bit or other type,
whether core is oriented and if so, by what method,
etc).
|
A total of 1,357 HA holes for
12,643m have been drilled to date at the Kasiya Rutile Deposit to
obtain samples for quantitative determination of recoverable rutile
and Total Graphitic Carbon (TGC).
A PT infill drilling programme,
designed to support the resource estimate, was completed. An
additional 234 core holes for 2,368.5m were included in the updated
MRE. The total PT holes contributing to the updated MRE are 488 for
4,669m.
A total of 182 AC holes for 4,404m
were completed in six locations across the Kasiya deposit deemed
likely to fall into mining pit areas. The results are included in
this updated MRE.
Placer has reviewed SOPs for HA, PT
and AC drilling and found them to be fit for purpose and support
the resource classifications as applied to the MRE. Sample handling
and preparation techniques are consistent for PT and coring
samples.
Two similar designs of HA drilling
equipment are employed. HA drilling with 75mm diameter enclosed
spiral bits (SOS) with 1m
long steel rods and with 62mm diameter open spiral bits
(SP) with 1m long steel
rods. Drilling is oriented vertically by eye.
Each 1m of drill sample is collected
into separate sample bags and set aside. The auger bits and
flights are cleaned between each metre of sampling to avoid
contamination.
Core-drilling is undertaken using a
drop hammer, Dando Terrier MK1. The drilling generated 1m runs of
83mm PQ core in the first 2m and then transitioned to 72mm core for
the remainder of the hole. Core drilling is oriented vertically by
spirit level.
AC drilling was completed by
Thompson Drilling utilising a Smith Capital 10R3H compact
track-mounted drill. The drilling is vertical and generates 1m
samples with care taken in the top metres to ensure good recoveries
of the high-grade surface material. Each 1m sample bag is
immediately transported back to Sovereign's field laydown yard
where they await processing.
|
Drill Sample
Recovery
|
Method of recording and assessing core and chip sample
recoveries and results assessed.
|
Samples are assessed visually for
recoveries. The configuration of drilling and nature of materials
encountered results in negligible sample loss or
contamination.
HA and PT drilling is ceased when
recoveries become poor once the water table has been reached. Water
table and recovery information is included in lithological
logs.
Core drilling samples are actively
assessed by the driller and geologist onsite for recoveries and
contamination.
AC drilling recovery in the top few
metres are moderate to good. Extra care is taken to ensure sample
is recovered best as possible in these metres. Recoveries are
recorded on the rig at the time of drilling by the geologist.
Drilling is ceased when recoveries become poor or once Saprock or
refusal has been reached.
|
Measures taken to maximise sample recovery and ensure
representative nature of the samples.
|
The Company's trained geologists
supervise drilling on a 1 team 1 geologist basis and are
responsible for monitoring all aspects of the drilling and sampling
process.
For PT drilling, core is extruded
into core trays; slough is actively removed by the driller at the
drilling rig and core recovery and quality is recorded by the
geologist.
AC samples are recovered in large
plastic bags. The bags are clearly labelled and delivered back to
sovereign's laydown yard at the end of shift for
processing.
|
Whether a relationship exists between sample recovery and
grade and whether sample bias may have occurred due to preferential
loss/gain of fine/coarse material.
|
No relationship is believed to exist
between grade and sample recovery. The high percentage of silt and
absence of hydraulic inflow from groundwater at this deposit
results in a sample size that is well within the expected size
range.
No bias related to preferential loss
or gain of different materials is observed.
|
Logging
|
Whether core and chip samples have been geologically and
geotechnically logged to a level of detail to support appropriate
Mineral Resource estimation mining studies and metallurgical
studies.
|
Geologically, data is collected in
detail, sufficient to aid in Mineral Resource
estimation.
All individual 1m HA intervals are
geologically logged, recording relevant data to a set log-chief
template using company codes. A small representative sample is
collected for each 1m interval and placed in appropriately labelled
chip trays for future reference.
All individual 1m PT core intervals
are geologically logged, recording relevant data to a set log-chief
template using company codes.
Half core remains in the trays and
is securely stored in the company warehouse.
All individual AC 1-metre intervals
are geologically logged, recording relevant features.
data to a set log-chief template
using company codes. A small representative sample is collected for
each 1-metre interval and placed in appropriately labelled chip
trays for future reference.
|
Whether logging is qualitative or quantitative in nature. Core
(or costean, channel, etc.) photography.
|
All logging includes lithological
features and estimates of basic mineralogy. Logging is generally
qualitative.
The PT core is photographed dry,
after logging and sampling is completed.
|
The
total length and percentage of the relevant intersection
logged
|
100% of samples are geologically
logged.
|
Sub-sampling techniques and
sample preparation
|
If
core, whether cut or sawn and whether quarter, half or all core
taken.
|
Due to the soft nature of the
material, core samples are carefully cut in half by hand
tools.
|
If
non-core, whether riffled, tube sampled, rotary split, etc. and
whether sampled wet or dry.
|
HA, PT and AC hole samples are
dried, riffle split and composited. Samples are collected and
homogenised prior to splitting to ensure sample representivity.
~1.5kg composite samples are processed.
An equivalent mass is taken from
each primary sample to make up the composite.
The primary composite sample is
considered representative for this style of mineralisation and is
consistent with industry standard practice.
|
For
all sample types, the nature, quality and appropriateness of the
sample preparation technique.
|
Techniques for sample preparation
are detailed on SOP documents verified by Placer Resource
Geologists.
Sample preparation is recorded on a
standard flow sheet and detailed QA/QC is undertaken on all
samples. Sample preparation techniques and QA/QC protocols are
appropriate for mineral determination and support the resource
classifications as stated.
|
Quality control procedures adopted for all sub-sampling stages
to maximise representivity of samples.
|
The sampling equipment is cleaned
after each sub-sample is taken.
Field duplicate, laboratory
replicate and standard sample geostatistical analysis is employed
to manage sample precision and analysis accuracy.
|
Measures taken to ensure that the sampling is representative
of the in situ material collected, including for instance results
for field duplicate/second-half sampling.
|
Sample size analysis is completed to
verify sampling accuracy. Field duplicates are collected for
precision analysis of riffle splitting. SOPs consider sample
representivity. Results indicate a sufficient level of precision
for the resource classification.
|
Whether sample sizes are appropriate to the grain size of the
material being sampled.
|
The sample size is considered
appropriate for the material sampled.
|
Quality of assay data and
laboratory tests
|
The
nature, quality and appropriateness of the assaying and laboratory
procedures used and whether the technique is considered partial or
total.
|
Rutile
The Malawi onsite laboratory sample
preparation methods are considered quantitative to the point where
a heavy mineral concentrate (HMC) is generated.
Final results generated are for
recovered rutile i.e, the % mass of the sample that is rutile that
can be recovered to the non-magnetic component of a HMC.
Heavy liquid separation
(HLS) of the HM is no
longer required and a HM result is not reported in the updated MRE.
The HMC prepared via wet-table, gravity separation at the Lilongwe
Laboratory provides an ideal sample for subsequent magnetic
separation and XRF.
All 8,855 samples (not incl. QA)
included in the MRE update received the following workflow
undertaken on-site in Malawi;
· Dry
sample in oven for 1 hour at 105℃
· Soak
in water and lightly agitate
· Wet
screen at 5mm, 600µm and 45µm to remove oversize and slimes
material
· Dry
+45µm -600mm (sand fraction) in oven for 1 hour at
105℃
7,904 of the 8,855 samples received
the following workflow undertaken on-site in Malawi
· Pass
+45µm -600mm (sand fraction) across wet table to generate a
HMC.
· Dry
HMC in oven for 30 minutes at 105℃
Bag HMC fraction and send to Perth,
Australia for quantitative chemical and mineralogical
determination.
951 of the 8,855 samples received
the following workflow undertaken at Perth based Laboratories
(superseded).
· Split
~150g of sand fraction for HLS using Tetrabromoethane (TBE, SG 2.96g/cc) as the liquid heavy
media to generate HMC. Work undertaken at Diamantina
Laboratories.
4,738 of the 8,855 samples received
magnetic separation undertaken at Allied Mineral Laboratories in
Perth, Western Australia.
· Magnetic separation of the HMC by Carpco magnet @ 16,800G
(2.9Amps) into a magnetic (M) and non-magnetic (NM) fraction.
4,117 of the 8,855 samples received
magnetic separation undertaken on-site in Malawi.
· Magnetic separation of the HMC by Mineral Technologies Reading
Pilot IRM (Induced Roll Magnetic) @ 16,800G (2.9Amps) into a
magnetic (M) and
non-magnetic (NM)
fraction.
All 8,855 routine samples received
the following chemical analysis in Perth, Western
Australia.
· The
routine NM fractions are sent to ALS Metallurgy Perth for
quantitative XRF analysis. Samples receive XRF_MS and are analysed
for: TiO2, Al2O3, CaO,
Cr2O3, Fe2O3,
K2O, MgO, MnO, SiO2,
V2O5, ZrO2, HfO2.
Graphite
8,078 graphite samples are processed
at Intertek-Genalysis Johannesburg and Perth via method
C72/CSA.
A portion of each test sample is
dissolved in dilute hydrochloric acid to liberate carbonate carbon.
The solution is filtered using a filter paper and the collected
residue is the dried to 425°C in a muffle oven to drive off organic
carbon. The dried sample is then combusted in a Carbon/ Sulphur
analyser to yield total graphitic or TGC.
An Eltra CS-800 induction furnace
infra-red CS analyser is then used to determine the remaining
carbon which is reported as TGC as a percentage.
|
For
geophysical tools, spectrometers, handheld XRF instruments, etc.,
the parameters used in determining the analysis including
instrument make and model, reading times, calibrations factors
applied and their derivation, etc.
|
Acceptable levels of accuracy and
precision have been established. No pXRF methods are used for
quantitative determination.
|
Nature of quality control procedures adopted (e.g. standards,
blanks, duplicate, external laboratory checks) and whether
acceptable levels of accuracy (i.e. lack of bias) and precision
have been established.
|
Sovereign uses internal and
externally sourced wet screening reference material inserted into
samples batches at a rate of 1 in 20. The externally sourced,
certified standard reference material for HM and Slimes assessment
is provided by Placer Consulting.
An external laboratory raw sample
duplicate is sent to laboratories in Perth, Australia as an
external check of the full workflow. These duplicates are produced
at a rate of 1 in 20.
Accuracy monitoring is achieved
through submission of certified reference materials (CRM's). ALS and Intertek both use
internal CRMs and duplicates on XRF analyses.
Sovereign also inserts CRMs into the
sample batches at a rate of 1 in 20.
Three Rutile CRMs are used by
Sovereign and range from 35% - 95% TiO2.
Three Graphite CRMs are used by
Sovereign and range from 3% - 25% TGC.
Analysis of sample duplicates is
undertaken by standard geostatistical methodologies (Scatter, Pair
Difference and QQ Plots) to test for bias and to ensure that sample
splitting is representative. Standards determine assay
accuracy performance, monitored on control charts, where failure
(beyond 3SD from the mean) may trigger re-assay of the affected
batch.
Examination of the QA/QC sample data
indicates satisfactory performance of field sampling protocols and
assay laboratories providing acceptable levels of precision and
accuracy.
Acceptable levels of accuracy and
precision are displayed in geostatistical analyses to support the
resource classifications as applied to the estimate.
|
Verification of sampling
& assaying
|
The
verification of significant intersections by either independent or
alternative company personnel.
|
Results are reviewed in
cross-section using Datamine Studio RM software and any spurious
results are investigated. The deposit type and consistency of
mineralisation leaves little room for unexplained variance. Extreme
high grades are not encountered.
|
The
use of twinned holes.
|
Twinned holes are drilled across a
geographically dispersed area to determine short-range geological
and assay field variability for the resource estimation. Twin
drilling is applied at a rate of 1 in 20 routine holes. Twin paired
data in all drill methods represent ~4% of the database included in
the updated MRE. Substantial comparative data between different
drilling types and test pit results are also available but not
referenced in the MRE.
|
Documentation of primary data, data entry procedures, data
verification, data storage (physical and electronic)
protocols.
|
All data are collected
electronically using coded templates and logging software. This
data is then imported to a cloud hosted Database and validated
automatically and manually.
A transition to electronic field and
laboratory data capture has been achieved.
|
Discuss any adjustment to assay data.
|
Assay data adjustments are made to
convert laboratory collected weights to assay field percentages and
to account for moisture.
QEMSCAN of the NM fraction shows
dominantly clean and liberated rutile grains and confirms rutile is
the only titanium species in the NM fraction.
Recovered rutile is defined and
reported here as: TiO2 recovered in the +45 to -600um
range to the NM concentrate fraction as a % of the total primary,
dry, raw sample mass divided by 95% (to represent an approximation
of final product specifications). i.e
recoverable rutile within the whole sample.
|
Location of data
points
|
Accuracy and quality of surveys used to locate drill holes
(collar and down-hole surveys), trenches, mine workings and other
locations used in Mineral Resource estimation.
|
A Trimble R2 Differential GPS is
used to pick up the collars. Daily capture at a registered
reference marker ensures equipment remains in
calibration.
No downhole surveying of any holes
is completed. Given the vertical nature and shallow depths of the
holes, drill hole deviation is not considered to significantly
affect the downhole location of samples.
|
Specification of the grid system used.
|
WGS84 UTM Zone 36 South.
|
Quality and adequacy of topographic control.
|
The digital terrane model
(DTM) was generated by
wireframing a 20m-by-20m lidar drone survey point array,
commissioned by SVM in March 2022. Major cultural features were
removed from the survey points file prior to generating the
topographical wireframe for resource model construction. The
ultra-high resolution 3D drone aerial survey was executed utilising
a RTK GPS equipped Zenith aircraft with accuracy of <10cm ground
sampling distance (GSD). Post-processing includes the removal of
cultural features that do not reflect material movements (pits,
mounds, etc)
The DTM is suitable for the
classification of the resources as stated.
|
Data spacing &
distribution
|
Data spacing for reporting of Exploration
Results.
|
The HA collars are spaced at
nominally 400m along the 400m spaced drill-lines with the PT holes
similarly spaced at an offset, infill grid. The resultant
200m-by-200m drill spacing (to the strike orientation of the
deposit) is deemed to adequately define the mineralisation in the
MRE.
The AC collars are spaced on a 200m
x 200m grid which is deemed to adequately define the
mineralisation.
The PT twin and density sample holes
are selectively placed throughout the deposit to ensure a broad
geographical and lithological spread for the
analysis.
|
Whether the data spacing and distribution is sufficient to
establish the degree of geological and grade continuity appropriate
for the Mineral Resource and Ore Reserve estimation procedure(s)
and classifications applied.
|
The drill spacing and distribution
is considered to be sufficient to establish a degree of geological
and grade continuity appropriate for the Mineral Resource
estimation.
Kriging neighbourhood analysis
completed using Supervisor software informs the optimal drill and
sample spacing for the MRE. Based on these results and the
experience of the Competent Person, the data spacing and
distribution is considered adequate for the definition of
mineralisation and adequate for Mineral Resource
Estimation.
|
Whether sample compositing has been applied.
|
Individual 1m auger intervals have
been composited, based on lithology, at 2 - 5m sample intervals for
the 1,357 HA holes. 488 PT core holes have been sampled at a
regular 2m interval to provide greater control on mineralisation
for the Indicated Resource.
Individual 1m intervals have been
composited, based on lithology, at a max 2m sample interval for the
182 AC holes.
The DH Compositing tool was utilised
in Supervisor software to define the optimal sample compositing
length. A 2m interval is applied to the MRE.
|
Orientation of data in
relation to geological structure
|
Whether the orientation of sampling achieves unbiased sampling
of possible structures and the extent to which this is known
considering the deposit type
|
Sample orientation is vertical and
approximately perpendicular to the orientation of the
mineralisation, which results in true thickness estimates, limited
by the sampling interval as applied. Drilling and sampling are
carried out on a regular square grid. There is no apparent bias
arising from the orientation of the drill holes with respect to the
orientation of the deposit.
|
If
the relationship between the drilling orientation and the
orientation of key mineralised structures is considered to have
introduced a sampling bias, this should be assessed and reported if
material.
|
There is no apparent bias arising
from the orientation of the drill holes with respect to the
orientation of the deposit.
|
Sample
security
|
The
measures taken to ensure sample security
|
Samples are stored in secure storage
from the time of drilling, through gathering, compositing and
analysis. The samples are sealed as soon as site preparation
is complete.
A reputable international transport
company with shipment tracking enables a chain of custody to be
maintained while the samples move from Malawi to Australia. Samples
are again securely stored once they arrive and are processed at
Australian laboratories. A reputable domestic courier company
manages the movement of samples within Perth, Australia.
At each point of the sample workflow
the samples are inspected by a company representative to monitor
sample condition. Each laboratory confirms the integrity of the
samples upon receipt.
|
Audits or
reviews
|
The
results of any audits or reviews of sampling techniques and
data
|
The CP Richard Stockwell has
reviewed and advised on all stages of data collection, sample
processing, QA protocol and Mineral Resource Estimation. Methods
employed are considered industry best-practice.
Perth Laboratory visits have been
completed by Mr Stockwell. Field and in-country lab visits have
been completed by Mr Stockwell. A high standard of operation,
procedure and personnel was observed and reported.
|
Section 2 - Reporting of Exploration Results
Criteria
|
Explanation
|
Commentary
|
Mineral tenement & land
tenure status
|
Type, reference name/number, location and ownership including
agreements or material issues with third parties such as joint
ventures, partnerships, overriding royalties, native title
interests, historical sites, wilderness or national park and
environment settings.
|
The Company owns 100% of the
following Exploration Licences (ELs) issued under the 2019 Mines Act,
held in the Company's wholly-owned, Malawi-registered subsidiaries:
EL0609, EL0582, EL0492, EL0528,
EL0545, EL0561, EL0657 and EL0710.
A 5% royalty is payable to the
government upon mining and a 2% of net profit royalty is payable to
the original project vendor.
No significant native vegetation or
reserves exist in the area. The region is intensively cultivated
for agricultural crops.
|
The
security of the tenure held at the time of reporting along with any
known impediments to obtaining a licence to operate in the
area.
|
The tenements are in good standing
and no known impediments to exploration or mining exist.
|
Exploration done by other
parties
|
Acknowledgement and appraisal of exploration by other
parties.
|
Sovereign is a first-mover in the
discovery and definition of residual rutile and graphite resources
in Malawi. No other parties are, or have been, involved in
exploration.
|
Geology
|
Deposit type, geological setting and style of
mineralisation
|
The rutile deposit type is
considered a residual placer formed by the intense weathering of
rutile-rich basement paragneisses and variable enrichment by
elluvial processes.
Rutile occurs in a mostly
topographically flat area west of Malawi's capital, known as the
Lilongwe Plain, where a deep tropical weathering profile is
preserved. A typical profile from top to base is generally soil
("SOIL" 0-1m) ferruginous pedolith ("FERP", 1-4m), mottled zone
("MOTT", 4-7m), pallid saprolite ("PSAP", 7-9m), saprolite ("SAPL",
9-25m), saprock ("SAPR", 25-35m) and fresh rock ("FRESH"
>35m).
The low-grade graphite
mineralisation occurs as multiple bands of graphite gneisses,
hosted within a broader Proterozoic paragneiss package. In the
Kasiya areas specifically, the preserved weathering profile hosts
significant vertical thicknesses, from near surface, of graphite
mineralisation.
|
Drill hole
information
|
A
summary of all information material to the understanding of the
exploration results including a tabulation of the following
information for all Material drill holes: easting and northings of
the drill hole collar; elevation or RL (Reduced Level-elevation
above sea level in metres of the drill hole collar); dip and
azimuth of the hole; down hole length and interception depth; and
hole length
|
All intercepts relating to the
Kasiya Deposit have been included in public releases during each
phase of exploration and in this report. Releases included all
collar and composite data and these can be viewed on the Company
website.
There are no further drill hole
results that are considered material to the understanding of the
exploration results. Identification of the broad zone of
mineralisation is made via multiple intersections of drill holes
and to list them all would not give the reader any further
clarification of the distribution of mineralisation throughout the
deposit.
|
If
the exclusion of this information is justified on the basis that
the information is not Material and this exclusion does not detract
from the understanding of the report, the Competent Person should
clearly explain why this is the case
|
No information has been
excluded.
|
Data aggregation
methods
|
In
reporting Exploration Results, weighting averaging techniques,
maximum and/or minimum grade truncations (e.g. cutting of
high-grades) and cut-off grades are usually Material and should be
stated.
|
All results reported are of a
length-weighted average of in-situ grades. The resource is reported
at a range of bottom cut-off grades in recognition that
optimisation and financial assessment is outstanding.
A nominal bottom cut of 0.7% rutile
is offered, based on preliminary assessment of resource product
value and anticipated cost of operations.
|
Where aggregate intercepts incorporate short lengths of
high-grade results and longer lengths of low-grade results, the
procedure used for such aggregation should be stated and some
typical examples of such aggregations should be shown in
detail.
|
No data aggregation was
required.
|
The
assumptions used for any reporting of metal equivalent values
should be clearly stated.
|
Rutile Equivalent (RutEq) - where applicable
Formula: ((Rutile Grade x
Recovery (100%) x Rutile Price (US$1,484/t) + Graphite Grade x
Recovery (67.5%) x Graphite Price (US$1,290/t)) / Rutile Price
(US$1,484/t)).
Commodity
Prices:
· Rutile
price: US$1,484/t
· Graphite price: US$1,290/t
Metallurgical Recovery to
Product:
· Rutile
Recovery: 100%
· Graphite Recovery: 67.5%
All assumptions taken from this
Study and with discussion and Modifying Factors included in this
document.
|
Relationship between
mineralisation widths & intercept lengths
|
These relationships are particularly important in the
reporting of Exploration Results.
|
The mineralisation has been released
by weathering of the underlying, layered gneissic bedrock that
broadly trends NE-SW at Kasiya North and N-S at Kasiya South. It
lies in a laterally extensive superficial blanket with high-grade
zones reflecting the broad bedrock strike orientation of ~045° in
the North of Kasiya and 360° in the South of Kasiya.
|
If
the geometry of the mineralisation with respect to the drill hole
angle is known, its nature should be reported.
|
The mineralisation is laterally
extensive where the entire weathering profile is preserved and not
significantly eroded. Minor removal of the mineralised profile has
occurred in alluvial channels. These areas are adequately defined
by the drilling pattern and topographical control for the resource
estimate.
|
If
it is not known and only the down hole lengths are reported, there
should be a clear statement to this effect (e.g. 'down hole length,
true width not known'.
|
Downhole widths approximate true
widths limited to the sample intervals applied. Mineralisation
remains open at depth and in areas coincident with high-rutile
grade lithologies in basement rocks, is increasing with depth.
Graphite results are approximate true width as defined by the
sample interval and typically increase with depth.
|
Diagrams
|
Appropriate maps and sections (with scales) and tabulations of
intercepts should be included for any significant discovery being
reported. These should include, but not be limited to a plan view
of the drill collar locations and appropriate sectional
views.
|
Refer to figures in this report and
in previous releases. These are accessible on the Company's
webpage.
|
Balanced
reporting
|
Where comprehensive reporting of all Exploration Results is
not practicable, representative reporting of both low and
high-grades and/or widths should be practiced to avoid misleading
reporting of exploration results.
|
All results are included in this
report and in previous releases. These are accessible on the
Company's webpage.
|
Other substantive exploration
data
|
Other exploration data, if meaningful and material, should be
reported including (but not limited to: geological observations;
geophysical survey results; geochemical survey results; bulk
samples - size and method of treatment; metallurgical test results;
bulk density, groundwater, geotechnical and rock characteristics;
potential deleterious or contaminating
substances.
|
Limited lateritic duricrust has been
variably developed at Kasiya, as is customary in tropical highland
areas subjected to seasonal wet/dry cycles. Lithological logs
record drilling refusal in just under 2% of the HA/PT drill
database. No drilling refusal was recorded above the saprock
interface by AC drilling.
Slimes (-45 µm) averages 46wt% in
the Indicated Resource at a 0.7% rutile bottom cut. Separation test
work conducted at AML demonstrates the success in applying a
contemporary mineral sands flowsheet in treating this material and
achieving excellent rutile recovery.
Sample quality (representivity) is
established by geostatistical analysis of comparable sample
intervals.
Several generations of QEMSCAN
analysis of the NM performed at ALS Metallurgy fraction shows
dominantly clean and liberated rutile grains and confirms rutile is
the only titanium species in the NM fraction.
|
Further
work
|
The nature and scale of planned
further work (e.g. test for lateral extensions or depth extensions
or large-scale step-out drilling).
|
Further AC drilling will allow the
definition of a more extensive saprock-interface basement and
should continue to deliver additional resources below the
HA/PT-drilled regions.
A greater understanding of the
lithological character and extent of those basement units, where
high-grade (>1%) rutile persists at the saprock interface, may
assist in focussing further resource definition and exploration
targeting.
Further metallurgical assessment is
suggested to characterise rutile quality and establish whether any
chemical variability is inherent across the deposit.
Trialling drill definition at a 100m
spacing is suggested for Measured Resource assessment.
|
Diagrams clearly highlighting the areas of possible
extensions, including the main geological interpretations and
future drilling areas, provided this information is not
commercially sensitive.
|
Refer to diagrams in the body of
this report and in previous releases. These are accessible on the
Company's webiste.
|
Section 3 - Estimation and Reporting of Mineral
Resources
Criteria
|
JORC Code
explanation
|
Commentary
|
Database
integrity
|
Measures taken to ensure that data has not been corrupted by,
for example, transcription or keying errors, between its initial
collection and its use for Mineral Resource estimation
purposes.
|
Data are manually entered into
database tables according to SOPs and conforming to company field
names and classifications. These are then migrated to Datashed5
cloud-hosted database managed internally by the Company with
validation and quarantine capability. Relevant tables from the
database are exported to csv format and forwarded to Placer for
independent review.
|
Data validation procedures used.
|
Validation of the primary data
include checks for overlapping intervals, missing survey data,
missing assay data, missing lithological data, missing and
mis-matched (to Lithology) collars.
Statistical, out-of-range,
distribution, error and missing data validation is completed by
Placer on data sets before being compiled into a de-surveyed drill
hole file and interrogated in 3D using Datamine Studio RM software.
All questions relating to the input
data are forwarded to the client for review and resolution prior to
resource estimation.
|
Site visits
|
Comment on any site visits undertaken by the Competent Person
and the outcome of those visits.
|
Perth Laboratory visits have been
completed by the Competent Person, Mr Richard Stockwell. Field and
in-country lab visits were complete over a 1-week period in May
2022. A high standard of operation, procedure and personnel was
observed and reported.
|
If
no site visits have been undertaken indicate why this is the
case.
|
Not applicable
|
Geological
interpretation
|
Confidence in (or conversely, the uncertainty of) the
geological interpretation of the mineral deposit.
|
There is a high degree of
repeatability and uniformity in the geological character of the
Kasiya Deposit demonstrated by lithological logging of AC, PT core
and HA samples. Satellite imagery and airborne geophysical data
provided guidance for interpreting the strike continuity of the
deposit.
Drill hole intercept logging and
assay results (AC, PT and HA), stratigraphic interpretations from
drill core and geological logs of drill data have formed the basis
for the geological interpretation. The drilling exclusively
targeted the SOIL, FERP, MOTT and SAPL weathering horizons, with no
sampling of the SAPR and below the upper level of the fresh rock
(FRESH) domain.
|
Nature of the data used and of any assumptions
made.
|
No assumptions were made.
|
The effect, if any, of alternative interpretations on Mineral
Resource estimation.
|
No alternative interpretations on
Mineral Resource Estimation are offered.
|
The
use of geology in guiding and controlling Mineral Resource
estimation.
|
The mineral resource is constrained
by the drill array plus one interval in each of the X, Y and Z
axes.
The topographical DTM constrains the
vertical extent of the resource. Rutile, enriched at surface by
deflation and elluvial processes, is constrained internally by a
hard boundary at the base of the SOIL and FERP horizons that overly
the (generally less-mineralised) MOTT and SAPL horizons. In this
way, continuity of rutile, observed in surface drilling results, is
honoured between drill lines rather than being diluted by averaging
with underlying, lower-grade material.
The base to mineralisation is
arbitrarily designated at effective drill depth plus one (average
sample width) interval in the Z orientation in HA/PT drilling. The
effective drill depth is where HA drilling intersects the static
water table, rather than being a true depth to un-mineralised
basement. Deeper drilling using the AC method has shown rutile
enrichment persists to bedrock and a material resource increase is
anticipated upon application of this method to a broader
area.
A base to mineralisation of BOH plus
2.7m (-2.7 RL) is retained for this estimate, where drilled by
HA/PT methods. This basement horizon is interpreted on 200m north
sections and accounts for artifacts of ineffective drilling
terminating in soil or ferp horizons. It is applied consistently to
both Indicated and Inferred resource areas.
AC drilling has accurately defined
depth to basement at the saprock interface, which has been modelled
where intersected in the updated MRE.
|
The
factors affecting continuity both of grade and
geology.
|
Rutile grade is generally
concentrated in surface regolith horizons. Deposit stratigraphy and
weathering is consistent along and across strike. Rutile grade
trend is oriented at 45 degrees at Kasiya North and 360 degrees at
Kasiya South, which mimics the underlying basement source rocks and
residual topography. Rutile varies across strike as a result of the
layering of mineralised and non-mineralised basement
rocks.
|
Dimensions
|
The extent and variability of the Mineral Resource expressed
as length (along strike or otherwise), plan width, and depth below
surface to the upper and lower limits of the Mineral
Resource.
|
The Kasiya mineralised footprint
strikes NE - SW and currently occupies an area of about
201km2.
Depth to basement is described
previously.
|
Estimation and modelling
techniques
|
The
nature and appropriateness of the estimation technique(s) applied
and key assumptions, including treatment of extreme grade values,
domaining, interpolation parameters and maximum distance of
extrapolation from data points. If a computer assisted estimation
method was chosen include a description of computer software and
parameters used.
|
Datamine Studio RM and Supervisor
software are used for the data analysis, variography, geological
interpretation and resource estimation. Key fields are interpolated
into the volume model using a range of parameters and interpolation
methods to establish best fit for the deposit. For the Kasiya MRE
update, the Inverse Distance weighting (power 4) method was seen to
perform a superior interpolation of informing data and replication
of the high-value and thin, surface (SOIL/FERP) grade distribution.
This was assisted by the (customary) application of a Dynamic
Anisotropy search, informed by the results of variography, Suitable
limitations on the number of samples and the impact of those
samples, was maintained.
Extreme grade values were not
identified by statistical analysis, nor were they anticipated in
this style of deposit. No top cut is applied to the resource
estimation.
Interpolation was constrained by
hard boundaries (domains) that result from the geological
interpretation.
|
|
The
availability of check estimates, previous estimates and/or mine
production records and whether the Mineral Resource estimate takes
appropriate account of such data.
|
This is the fourth MRE for the
Kasiya Deposit.
Bulk-scale test work has been
completed and results support the view of the Competent Person that
an economic deposit of readily separable, high-quality rutile is
anticipated from the Kasiya Deposit. The recovery of a coarse-flake
graphite by-product was achieved by the test work.
|
|
The assumptions made regarding recovery of
by-products.
|
A graphite co-product was modelled
as recoverable TGC.
|
|
Estimation of deleterious elements or other non-grade
variables of economic significance (e.g. sulphur for acid mine
drainage characterisation).
|
No significant deleterious elements
are identified. A selection of assay, magnetic separation and XRF
results are modelled and are reported.
|
|
In
the case of block model interpolation, the block size in relation
to the average sample spacing and the search
employed.
|
The average parent cell size used is
equivalent to the average drill hole spacing within the Indicated
Resource (200m*200m). Cell size in the Z-axis is established
to cater for the composite sample spacing and definition of the
Topsoil domain. This resulted in a parent cell size of 200m x 200m
x 3m for the volume model with 5 sub-cell splits available in the X
and Y axes and 10 in the Z axis to smooth topographical and
lithological transitions. Both parent cell and sub-cell
interpolations were completed and reported. The sub-cell
interpolation was again applied to this MRE as it better reflected
the geological interpretation and a reasonable graduation of
informing data through intermediate cell areas.
A Topsoil horizon has been defined
at 0.3m thickness throughout the Indicated Resource area to support
anticipated ore reserve calculation and mining studies. Topsoil is
disclosed separately but remains in the MRE in recognition of
advanced rehabilitation studies in the PFS by Agreenco.
|
|
Any
assumptions behind modelling of selective mining
units.
|
No assumptions were made regarding
the modelling of selective mining units. The resource is
reported at an Indicated level of confidence and is suitable for
optimisation and the calculation of a Probable Reserve.
|
|
Any
assumptions about correlation between variables.
|
No assumptions were made regarding
the correlation between variables.
|
|
Description of how the geological interpretation was used to
control the resource estimates.
|
Interpolation was constrained by
hard boundaries (domains) that result from the geological
interpretation.
|
|
Discussion of basis for using or not using grade cutting or
capping.
|
Extreme grade values were not
identified by statistical analysis, nor were they anticipated in
this style of deposit. No top cut is applied to the resource
estimation.
|
|
The
process of validation, the checking process used, the comparison of
model data to drill hole data, and use of reconciliation data if
available.
|
Validation of grade interpolations
was done visually In Datamine by loading model and drill hole files
and annotating, colouring and using filtering to check for the
appropriateness of interpolations.
Statistical distributions were
prepared for model zones from both drill holes and the model to
compare the effectiveness of the interpolation. Distributions of
section line averages (swath plots) for drill holes and models were
also prepared for each zone and orientation for comparison
purposes.
The resource model has effectively
averaged informing drill hole data and is considered
suitable to support the
resource classifications as applied to the
estimate.
|
Moisture
|
Whether the tonnages are estimated on a dry basis or with
natural moisture, and the method of determination of the moisture
content.
|
Tonnages are estimated on a dry
basis. No moisture content is factored.
|
Cut-off
parameters
|
The
basis of the adopted cut-off grade(s) or quality parameters
applied.
|
The resource is reported at a range
of bottom cut-off grades in recognition that optimisation and
financial assessment is outstanding.
A nominal bottom cut of 0.7% rutile
is offered, based on preliminary assessment of resource value and
anticipated operational cost.
|
Mining factors or
assumptions
|
Assumptions made regarding possible mining methods, minimum
mining dimensions and internal (or, if applicable, external) mining
dilution. It is always necessary as part of the process of
determining reasonable prospects for eventual economic extraction
to consider potential mining methods, but the assumptions made
regarding mining methods and parameters when estimating Mineral
Resources may not always be rigorous. Where this is the case, this
should be reported with an explanation of the basis of the mining
assumptions made.
|
Dry-mining has been determined as
the optimal method of mining for the Kasiya Rutile deposit. The
materials competence is loose, soft, fine and friable with no
cemented sand or dense clay layers, allowing for a free dig mining
method. It is considered that the strip ratio would be zero or near
zero.
Dilution is considered to be minimal
as mineralisation commonly occurs from surface and mineralisation
is generally gradational with few sharp boundaries.
Recovery parameters have not been
factored into the estimate. However, the valuable minerals
are readily separable due to their SG differential and are expected
to have a high recovery through the proposed, conventional wet
concentration plant.
|
Metallurgical factors or
assumptions
|
The
basis for assumptions or predictions regarding metallurgical
amenability. It is always necessary as part of the process of
determining reasonable prospects for eventual economic extraction
to consider potential metallurgical methods, but the assumptions
regarding metallurgical treatment processes and parameters made
when reporting Mineral Resources may not always be rigorous. Where
this is the case, this should be reported with an explanation of
the basis of the metallurgical assumptions made.
|
Rigorous metallurgical testwork on
rutile and graphite recoverability and specifications has been
completed on numerous bulk samples since 2018.
Rutile recovered to product is
modelled at 100% and graphite recovered to product is modelled at
67.5%.
Both products have best-in-class
chemical and physical specifications.
Refer to text of the announcement
for further details.
|
Environmental factors or
assumptions
|
Assumptions made regarding possible waste and process residue
disposal options. It is always necessary as part of the process of
determining reasonable prospects for eventual economic extraction
to consider the potential environmental impacts of the mining and
processing operation. While at this stage the determination of
potential environmental impacts, particularly for a greenfields
project, may not always be well advanced, the status of early
consideration of these potential environmental impacts should be
reported. Where these aspects have not been considered this should
be reported with an explanation of the environmental assumptions
made.
|
A large portion of the Mineral
Resource is confined to the SOIL, FERP and MOTT weathering domains,
and any sulphide minerals have been oxidised in the geological
past. Therefore, acid mine-drainage is not anticipated to be a
significant risk when mining from the oxidised domain.
The Kasiya deposit is located within
a farming area and has villages located along the strike of the
deposit. Sovereign holds regular discussions with local landholders
and community groups to keep them well informed of the status and
future planned directions of the project. Sovereign has benefited
from maintaining good relations with landowners and enjoys strong
support from the community at large.
Kasiya is in a sub-equatorial region
of Malawi and is subject to heavy seasonal rainfall, with rapid
growth of vegetation in season. Substantial vegetation or nature
reserve is absent in the area.
|
Bulk
density
|
Whether assumed or determined. If assumed, the basis for the
assumptions. If determined, the method used, whether wet or dry,
the frequency of the measurements, the nature, size and
representativeness of the samples.
|
Density was calculated from 310 full
core samples taken from geographically and lithologically-diverse
sites across the deposit. Density is calculated using a cylinder
volume wet and dry method performed by Sovereign in Malawi and
calculations verified by Placer Consulting.
Density data was loaded into an
Excel file, which was flagged against weathering horizons and
mineralisation domains. These results were then averaged, by domain
and applied to the MRE.
|
|
The
bulk density for bulk material must have been measured by methods
that adequately account for void spaces (vughs, porosity, etc.),
moisture and differences between rock and alteration zones within
the deposit.
|
As above.
|
|
Discuss assumptions for bulk density estimates used in the
evaluation process of the different materials.
|
An average density of 1.65
t/m3 was determined for the total weathering
profile.
This incorporates and average
density of 1.39 t/m3 for the SOIL domain, 1.58
t/m3 for the FERP domain, 1.66 t/m3 for the
MOTT domain, 1.69 t/m3 for the PSAP domain, 1.97
t/m3 for the SAPL domain, and 1.95 t/m3 for
the LAT domain. Density data are interpolated into the resource
estimate by the nearest neighbour method.
|
Classification
|
The
basis for the classification of the Mineral Resources into varying
confidence categories.
|
Classification of the
MRE is at an Indicated and Inferred
category. Minor regions of unclassified material occur in sparsely
drilled, typically extraneous regions of the mineralised area.
These are excluded from the resource
inventory.
Inferred classification is
attributed to those areas with drilling spaced at 400m x 400m.
Indicated classification is attributed to those areas with drilling
spaced at 200m x 200m.
|
|
Whether appropriate account has been taken of all relevant
factors (i.e. relative confidence in tonnage/grade estimations,
reliability of input data, confidence in continuity of geology and
metal values, quality, quantity and distribution of the
data).
|
All available data were assessed and
the competent person's relative confidence in the data was used to
assist in the classification of the Mineral Resource.
|
|
Whether the result appropriately reflects the Competent
Person's view of the deposit
|
Results appropriately reflects a
reasonable and conservative view of the deposit.
|
Audits or
reviews
|
The
results of any audits or reviews of Mineral Resource
estimates.
|
Independent audit of the MRE
construction was contracted to Datamine Australia by Placer prior
to delivery to SVM. A third party is engaged by SVM for a further
verification of the MRE.
|
Discussion of relative
accuracy/ confidence
|
Where appropriate a statement of the relative accuracy and
confidence level in the Mineral Resource estimate using an approach
or procedure deemed appropriate by the Competent Person. For
example, the application of statistical or geostatistical
procedures to quantify the relative accuracy of the resource within
stated confidence limits, or, if such an approach is not deemed
appropriate, a qualitative discussion of the factors that could
affect the relative accuracy and confidence of the
estimate.
|
Substantial additional
mineralisation was expected to occur below the effective depth of
HA and PT drilling. This has been confirmed by the deeper AC
drilling.
A high-degree of uniformity exists
in the broad and contiguous lithological and grade character of the
deposit. Drilling technique have been expertly applied and data
collection procedures, density assessments, QA protocols and
interpretations conform to industry best practice with few
exceptions.
Assay, mineralogical determinations
and metallurgical test work conform to industry best practice and
demonstrate a rigorous assessment of product and procedure. The
development of a conventional processing flowsheet and
marketability studies support the classification of the Kasiya
Resource.
|
|
The statement should specify whether it relates to global or
local estimates, and, if local, state the relevant tonnages, which
should be relevant to technical and economic evaluation.
Documentation should include assumptions made and the procedures
used.
|
The estimate is global.
|
|
These statements of relative accuracy and confidence of the
estimate should be compared with production data, where
available.
|
No production data are available to
reconcile model results.
|
Section 4 - Estimation and Reporting of Ore
Reserves
Criteria
|
Explanation
|
Commentary
|
Mineral Resource estimate for conversion to Ore
Reserves
|
Description of the Mineral Resource estimate used as a basis
for the conversion to an Ore Reserve.
Clear statement as to whether the Mineral Resources are
reported additional to, or inclusive of, the Ore
Reserves.
|
The current identified MRE underpins
the Ore Reserve. Sovereign engaged independent geological and
mining consultants Placer to complete the MRE for the Kasiya
deposit.
The principal resource geologist Mr
Richard Stockwell is highly experienced with more than 25 years in
resource estimation and mine geology. Mr Richard Stockwell is a
Competent Person for the purposes of the MRE as defined and in
accordance with the JORC Code 2012.
The MRE as reported in this document
is inclusive of the Ore Reserve declared in this document. The Ore
Reserve does not include Inferred Mineral Resources.
|
Site visits
|
Comment on any site visits
undertaken by the Competent Person and the outcome of those
visits.
|
Site visits have been carried out by
the following personnel:
·
Mr Frikkie Fourie, the Competent Person for the
JORC Mineral Reserve Estimate update, has conducted multiple
site visits, overseeing the excavation of the trial mining pit as
part of the recent Pilot Phase.
·
Mr Richard Stockwell, the Competent Person for the
JORC Mineral Resource Estimate and a representative of Placer
Consulting Pty Ltd has conducted one site visit.
|
Study status
|
The type and level of study
undertaken to enable Mineral Resources to be converted to Ore
Reserves.
The Code requires that a
study to at least Pre-Feasibility Study level has been undertaken
to convert Mineral Resources to Ore Reserves. Such studies will
have been carried out and will have determined a mine plan that is
technically achievable and economically viable, and that material
Modifying Factors have been considered.
|
The technical and financial
information in this release is at PFS-level enabling the restament
of Ore Reserves. The studies carried out have determined a mine
plan that is technically achievable and economically viable with
all material Modifying Factors having been considered.
The Ore Reserve in this OPFS, in
underpinned by a mine plan detailing mining locations, ore and
waste quantities; plant feed quantities and plant head grades.
Scheduling was undertaken in annual and quarterly
periods.
The Mine planning activities
included an updated pit optimisation, development of mineable pit
geometries, scheduling, mining cost estimation and financial
analysis in order to confirm the ability to economically mine the
Kasiya Ore Reserve.
Modifying factors considered and
reviewed during the OPFS mine planning process included pit slope
design criteria, mining costs, mining dilution and ore loss,
processing recoveries, processing costs, selling costs, general and
administration costs and product price.
|
Cut-off parameters
|
The basis of the adopted
cut-off grade(s) or quality parameters applied.
|
Pit cut-off grades varied between
0.7% and 0.9% rutile with cut-offs selected to provide the most
tonnage whilst minimising the pit footprint to have as little
environmental/social impact as possible.
The selected cut-off grades are
above the final project breakeven cut-off grade of approximately
0.40% rutile.
|
Mining factors or assumptions
|
The method and assumptions
used as reported in the Pre-Feasibility or Feasibility Study to
convert the Mineral Resource to an Ore Reserve (i.e. either by
application of appropriate factors by optimisation or by
preliminary or detailed design).
The choice, nature and
appropriateness of the selected mining method(s) and other mining
parameters including associated design issues such as pre-strip,
access, etc.
The assumptions made
regarding geotechnical parameters (e.g. pit slopes, stope sizes,
etc.), grade control and pre-production drilling.
The major assumptions made
and Mineral Resource model used for pit and stope optimisation (if
appropriate).
The mining dilution factors
used.
The mining recovery factors
used.
Any minimum mining widths
used.
The manner in which Inferred
Mineral Resources are utilised in mining studies and the
sensitivity of the outcome to their inclusion.
The infrastructure
requirements of the selected mining methods.
|
The Kasiya MRE was used as the basis
for the PFS Ore Reserve estimate. Mineral Resources were converted
to Ore Reserves in line with the material classifications which
reflect the level of confidence within the resource estimate. The
Ore Reserve reflects that portion of the Mineral Resource which can
be economically extracted by open pits utilising using conventional
dry mining techniques and a simple mobile excavator fleet. The Ore
Reserve considers the modifying factors and other parameters
detailed in the relevant sections of the OPFS report, including but
not limited to the mining, metallurgical, social, environmental,
approvals, tenure, statutory and financial aspects of the
project.
In line with the JORC 2012
guidelines, the Kasiya Probable Ore Reserve is based on Indicated
classified Mineral Resources. There is no Measured classified
Mineral Resource at Kasiya and consequently no Proved Ore Reserve.
Inferred classified material is not included in the Ore Reserve and
therefore is not considered for mining.
The reported MRE is inclusive of the
resources converted to Ore Reserves.
The Ore Reserve includes an
allowance for mining dilution and ore loss on the basis that all
material within the shell is classified and extracted as
ore.
The open pit geometries developed
for the purposes of mine planning, and which define the subsequent
Ore Reserve, are based on Whittle pit shells edited to comply with
practical mining requirements and identified exclusion
zones.
Selection of Mining method
The mining options were evaluated in
detail during the OPFS to determine the best suited mining method
for the operation. The criteria for selection were based not only
on capital and operating cost, but ESG considerations,
infrastructure requirements and operability. Sovereign performed
testwork on ROM material and conducted an extensive trial mining,
backfilling and rehabilitation operation. The outcomes of this work
resulted in a dry mining solution, utilising draglines, shovels and
trucks.
The conversion to conventional dry
mining methods adds significant production flexibility and lower
operational risk.
Pit
Optimisation
An open pit optimisation utilising
Whittle™ software was carried out on the Kasiya deposit using
Indicated Mineral Resources only (in line with the JORC 2012
guidelines). The latest parameters available were used to determine
the economic extent of the open pit excavation. The process plant
production parameters were supplied by Sovereign with an initial
rate of 12mtpa and a ramp up in production in year 5 to an annual
rate of 24Mtpa by the beginning of year 6.
Whilst dry mining lends itself to a
selective mining approach, the basis of the OPFS is a bulk mining
operation and therefore, all material within the "shell" will be
extracted and fed to the plant as ore and any interstitial waste
and/or sub-economic grade material will be likewise treated as
diluent material. However, due to the relatively homogenous and
continuous nature the orebody, the quantities of this material will
be relatively small and therefore a simple 5% dilution was applied
within the Whittle™ tool to approximate this assumption.
The OPFS uses an overall slope angle
of 20 degrees has been applied within the optimisation.
Mineable Pit Geometries
Based on the cut-off grades applied,
the optimization shells were further were further refined to
develop a mineable geometry. The process applied the following
constraints:
- A
minimum depth of 5m.
- Pit
extents limited to mineable areas and to remain outside of
identified exclusion areas wherever reasonably possible. Sovereign
identified all local village areas and areas of cultural or
environmental significance within the potential mining envelope
that should not be disturbed during the mining phase of the
Project.
|
Metallurgical factors or assumptions
|
The metallurgical process
proposed and the appropriateness of that process to the style of
mineralisation.
Whether the metallurgical
process is well-tested technology or novel in
nature.
The nature, amount and
representativeness of metallurgical test work undertaken, the
nature of the metallurgical domaining applied and the corresponding
metallurgical recovery factors applied.
Any assumptions or
allowances made for deleterious elements.
The existence of any bulk
sample or pilot scale test work and the degree to which such
samples are considered representative of the orebody as a
whole
For minerals that are
defined by a specification, has the ore reserve estimation been
based on the appropriate mineralogy to meet
specifications?
|
Rutile
Sovereign completed bulk rutile
testwork programs at the globally recognised AML in Perth,
Australia. The program was supervised by Sovereign's Head of
Development, Paul Marcos. Mr Marcos is a metallurgist and process
engineer and a mineral sands industry veteran. Bulk test-work
programs have confirmed premium grade rutile can be produced via a
simple and conventional process flow sheet.
Processing engineering was completed
by DRA Limited who developed the process plant design and
associated cost estimate for the OPFS. An average product grade of
96% TiO2 with 100% recovery to rutile product was
assumed for the PFS.
Graphite
Sovereign has conducted graphite
testwork across ALS Laboratory in Perth and SGS Lakefield in
Canada. Veteran graphite metallurgist Oliver Peters, MSc, P.Eng.,
MBA (Consulting Metallurgist for SGS and Principal Metallurgist of
Metpro Management Inc.) was engaged to supervise and consult on the
testwork programs. Mr Peters has over 25 years' experience in
metallurgy on graphite and other commodities. He has operated
numerous graphite pilot plants and commissioned a number of
full-scale processing facilities.
DRA's Senior Engineer, Stewart
Calder and Manager Metallurgy, John Fleay supervised and advised on
sample selection, testwork scope and results from the latest
testwork programs for the PFS. Both consultants are considered to
have the appropriate capabilities and similarities with the
material and the early stage of the project.
An average product grade of 96%
Ct with 67.5% recovery to product was assumed for the
PFS.
Rutile & Graphite
It is acknowledged that laboratory
scale test-work will not always represent actual results achieved
from a production plant in terms of grade, chemistry, sizing and
recovery. Further test-work will be required to gain additional
confidence of specifications and recoveries that will be achieved
at full-scale production.
Overall, the process flow-sheet is
conventional for both rutile and graphite with no novel features or
equipment incorporated.
|
Environmental
|
The status of studies of
potential environmental impacts of the mining and processing
operation. Details of waste rock characterisation and the
consideration of potential sites, status of design options
considered and, where applicable, the status of approvals for
process residue storage and waste dumps should be
reported.
|
An Environmental Impact Assessment
(ESIA) is underway with reference to applicable Malawian and
international environmental and social permitting and baseline
requirements for the Kasiya Project.
Sovereign is committed to conduct
its activities in full compliance to the requirements of national
regulations, its obligations under international conventions and
treaties and giving due consideration to international best
practices and policies. Sovereign has appointed an experienced
environmental consultant to manage the ESIA process, and
environmental and social baseline studies have commenced with
appropriately qualified independent experts. Sovereign has also
completed a high-level risk assessment to identify major
environmental and social risks which could affect the development
of the Project, along with mitigating strategies to allow
identified risks to be addressed early in the project design
phase.
Sovereign has embarked on several
exercises with the communities in the area and there is a general
positive acceptance of the Project.
Based on the current assessments and
commenced ESIA, the Competent Person believes there are no
environmental issues currently identified that cannot be
appropriately mitigated in accordance with standard practices
adopted for the development of mining projects.
|
Infrastructure
|
The existence of appropriate infrastructure: availability of
land for plant development, power, water, transportation
(particularly for bulk commodities), labour, accommodation; or the
ease with which the infrastructure can be provided, or
accessed.
|
Kasiya is located approximately 40km
northwest of Lilongwe, Malawi's capital, and boasts favourable
access to services and infrastructure. The proximity to Lilongwe
gives the project access to a large pool of professionals and
skilled tradespeople, as well as industrial services.
Logistics cost estimates, including
rail and port infrastructure and handling, were provided by Thelo
DB, Nacala Logistics and Grindrod based on market data, suppliers'
quotations, industry databases, industry contacts and the
consultant's existing knowledge of southern African transport
infrastructure and freight markets.
The above consultants are
independent with appropriate experience in the management of
transport logistics studies in southern Africa.
|
Costs
|
The derivation of, or
assumptions made, regarding projected capital costs in the
study.
The methodology used to
estimate operating costs.
Allowances made for the
content of deleterious elements.
The derivation of
assumptions made of metal or commodity price(s), for the principal
minerals and co- products.
Derivation of transportation
charges.
The basis for forecasting or
source of treatment and refining charges, penalties for failure to
meet specification, etc.
The allowances made for
royalties payable, both Government and private.
|
Capital estimates for the Project
have been prepared by PCC, together with input from DRA Limited,
Sovereign and other contributing consultants using
combinations of cost estimates from suppliers, historical data,
benchmarks and other independent sources. The accuracy of the
initial capital cost estimate for the Project is -20% and
+25%.
Capital costs include the cost of
all services, direct costs, contractor indirects, EPCM expenses,
non-process infrastructure, sustaining capital and other facilities
used for the mine. Capital costs make provision for mitigation
expenses and mine closure and environmental costs.
Working capital requirements
(including contingency) for plant commissioning and full ramp-up
have been included in the headline capital estimate reported under
construction, owner's and start-up costs.
Labor costs have been developed
based on a first-principles build-up of staffing requirements with
labor rates benchmarked in Malawi and expatriate rates benchmarked
for professionals from South Africa and other
jurisdictions.
A Government royalty of 5% (applied
to revenue) and a vendor profit share of 2% (applied to gross
profit) has been included in all project economics. A 0.45% royalty
(applied to revenue) has been applied for the community development
fund.
Rehabilitation and mine closure
costs are included within the reported operating cost and
sustaining capital estimates.
|
Revenue factors
|
The derivation of, or
assumptions made regarding revenue factors including head grade,
metal or commodity price(s) exchange rates, transportation and
treatment charges, penalties, net smelter returns,
etc.
The derivation of
assumptions made of metal or commodity price(s), for the principal
metals, minerals and co-products.
|
Sales pricing for both products is
based on current market analysis conducted by independent parties
(see below).
|
Market assessment
|
The demand, supply and stock
situation for the particular commodity, consumption trends and
factors likely to affect supply and demand into the
future.
A customer and competitor
analysis along with the identification of likely market windows for
the product.
Price and volume forecasts
and the basis for these forecasts.
|
Sovereign obtained independent
market assessments for both products.
Rutile
Sovereign engaged market leading
TZMI to provide a bespoke marketing report to support the Study.
TZMI is a global, independent consulting and publishing company
which specialises in technical, strategic and commercial analyses
of the opaque (non-terminal market) mineral, chemical and metal
sectors.
TZMI's assessment has confirmed
that, based upon their high-level view on global demand and supply
forecasts for natural rutile, and with reference to the specific
attributes of Kasiya, there is a reasonable expectation that the
product will be able to be sold into existing and future rutile
markets.
Given the premium specifications of
Kasiya's natural rutile, the product should be suitable for all
major natural end-use markets including TiO2 pigment
feedstock, titanium metal and welding sectors.
The rutile price adopted in the OPFS
is unchanged from the 2023 PFS rutile price which was based on
TZMI's real 2023 price forecast and confirmed by TZMI as part of
the OPFS. Using the above product mix, the LOM average "realised"
price for rutile was US$1,490 per tonne FOB, Nacala
Graphite
Sovereign engaged Fastmarkets, a
specialist international publisher and information provider for the
global steel, non-ferrous and industrial minerals markets, to
prepare a marketing report for graphite.
Fastmarkets' assessment has
confirmed that based upon their high-level view on global demand
and supply forecasts for natural flake graphite, and with reference
to the specific attributes of Sovereign's projects, there is a
reasonable expectation that the product from Sovereign's projects
will be able to be sold into existing and future graphite markets.
Given the extremely low-cost profile and high-quality product, it
is expected that output from Kasiya will be able to fill new demand
or substitute existing lower quality / higher cost
supply.
Project considerations taken by
Fastmarkets in forming an opinion about the marketability of
product include:
-
Low capital costs (incremental)
-
Low operating costs
-
High quality concentrate specifications
Industry participants confirm that
the highest value graphite concentrates remain the large, jumbo and
super-jumbo flake fractions, primarily used in industrial
applications such as refractories, foundries and expandable
products. These sectors currently make up the significant majority
of total global natural flake graphite market by value.
Fastmarkets have formed their
opinion based solely upon project information provided by Sovereign
to Fastmarkets and have not conducted any independent analysis or
due diligence on the information provided.
The Company has taken conservative
view on graphite pricing. The basket price used for the OPFS
remains unchanged from the 2023 PFS, remaining at US$1,290/t (real)
for the LOM.
Price forecasts for Kasiya's
graphite basket were sourced Fastmarkets as part of the OPFS. The
graphite price used in the OPFS is 30% lower than Fastmarkets'
long-term price forecast of US$1,846.
|
Economic
|
The inputs to the economic
analysis to produce the net present value (NPV) in the study, the
source and confidence of these economic inputs including estimated
inflation, discount rate, etc
NPV ranges and sensitivity
to variations in the significant assumptions and
inputs.
|
Key parameters are disclosed in the
body of the announcement, and include:
-
Life of Mine: 25 years
-
Discount rate: 8%
-
Royalty rate: 5% royalty (Government), 2% of gross
profit (Original Project Vendor) and 0.45% Community Development
Fund.
-
Pricing: Rutile average price of US$1,490
per tonne and Graphite average basket price of US$1,290 per
tonne
The OPFS financial model has been
built and prepared by Practara, an independent specialist mining
financial modelling company using inputs from the various expert
consultants and has been reviewed by SP
Angel Corporate Finance LLP, the Company's Nominated Advisor and
Corporate Broker as defined by the AIM Rules for Companies set out
by the London Stock Exchange, to validate the functionality and
accuracy of the model.
NPV sensitivity to costs and price
were assessed utilising the Project financial model developed by
Practara. As is the case for most commodity-based projects, the NPV
is most sensitive to changes in price, with a +/-25% variation in
both rutile and graphite price generating a +/-54% variation in
project pre-tax ungeared net present value at an 8% discount. It is
moderately sensitive to operating cost changes, with a +/-25% cost
change producing a -/+18% fluctuation in project pre-tax ungeared
net present value at an 8% discount. Approximately 3% of this value
change is attributable to mining costs, 4% to logistics costs and
the remaining 10% to processing/labour/G&A related costs. The
project is less sensitive to capital cost changes, with a +/-25%
variation in capital affecting NPV by -/+11%.
|
Social
|
The status of agreements
with key stakeholders and matters leading to social license to
operate.
|
Sovereign expects to enter into a
Community Development Agreement ("CDA") with the surrounding
communities. Significant engagement with these communities has
occurred over the exploration phases and is ongoing ahead of
negotiation of the CDA which is expected to be concluded during the
DFS stage.
|
Other
|
To
the extent relevant, the impact of the following on the project
and/or on the estimation and classification of the Ore
Reserves:
Any identified material naturally occurring
risks.
The status of material legal agreements and marketing
arrangements.
The status of government
agreements and approvals critical to the viability of the project,
such as mineral tenement status and government and statutory
approvals. There must be reasonable grounds to expect that all
necessary Government approvals will be received within the
timeframes anticipated in the Pre-Feasibility or Feasibility study.
Highlight and discuss the materiality of any unresolved matter that
is dependent on a third party on which extraction of the reserve is
contingent.
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No identifiable naturally occurring
risks have been identified to impact the Kasiya Ore
Reserve.
Sovereign has no existing binding
offtake agreement in place.
Sovereign is yet to apply for a
Mining Licence ("ML") covering the footprint of the project,
however it is not anticipated for there to be any objections in
obtaining the necessary government approvals.
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Classification
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The basis for the classification of
the Ore Reserves into varying confidence categories. Whether the
result appropriately reflects the Competent Person's view of the
deposit. The proportion of Probable Ore Reserves that have been
derived from Measured Mineral Resources (if any).
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The Kasiya Ore Reserves comprise
Indicated Mineral Resource material converted to "Probable"
reserves.
In line with JORC 2012 guidelines,
Inferred Mineral Resource material has not been
included.
100% of the Kasiya Ore Reserve is in
the Probable Reserves category.
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Audit or
reviews
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The results of any audits or reviews
of Ore Reserve estimates.
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No external audits or reviews have
been carried out to date.
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