TIDMJAN
RNS Number : 8211E
Jangada Mines PLC
10 November 2020
Jangada Mines plc / EPIC: JAN.L / Market: AIM / Sector:
Mining
10 November 2020
Jangada Mines plc ('Jangada' or the 'Company')
ValOre Announcement
Jangada Mines plc, a natural resources company, is pleased to
note the announcement released on 9 November 2020 by TSX-V listed
ValOre Metals Corp. ('ValOre'), in which Jangada holds a 17.68 per
cent interest.
The announcement has been reproduced exactly as reported below,
other than for the inclusion of images, and can be viewed in full
on ValOre's website using the following link:
http://valoremetals.com/news-media/news-releases/2020/valore-reports-further-encouraging-metallurgical-testing-results-from-pedra-branca-pge-project-91-palladium-recoveries-in-cyanide-leach-and-82-platinum-recovered-in-32-mass-in-gravity-sort
ValOre Reports Further Encouraging Metallurgical Testing Results
from Pedra Branca PGE Project: 91% palladium recoveries in cyanide
leach and 82% platinum recovered in 32% mass in gravity sort
Vancouver, B.C. ValOre Metals Corp. ("ValOre"; the "Company";
TSX -- V: VO; OTC: KVLQF; Frankfurt: KEQ0) today announced
preliminary metallurgical results for cyanide leach and Falcon
Ultra-Fine ("UF") testwork for ValOre's 100%-owned Pedra Branca
Platinum Group Element ("PGE") Project in northeastern Brazil.
"We are extremely pleased with both the high palladium
recoveries achieved with cyanidation tests and the gravity
concentration tests which showed more than 80% of the platinum
recovered in 32% of the mass," stated ValOre's Chairman and CEO,
Jim Paterson. "These favorable and complimentary results
significantly increase the optionality related to future
development of the Pedra Branca project and they provide real
impetus for ValOre to continue to perform tests to optimize
conditions and improve metallurgical recoveries."
Highlights from Cyanide Leach and Falcon UF Gravity Tests at
Pedra Branca
-- Hot cyanide metallurgical test recoveries of 84.4%, 88.5% and
91.7% palladium ("Pd") were achieved;
-- Falcon UF gravity test work was very effective at
concentrating platinum ("Pt") with 73.3% Pt recovered in only 9.6%
of the mass and 82.6% Pt recovered in 32.1% of the mass ;
-- Falcon UF gravity concentration may serve to optimize
conditions required for the Platsol(TM) process (see news release
date November 2, 2020) by favorably rejecting acid-consuming
minerals, and consequently, three subsequent Platsol(TM)
optimization tests have been initiated.
PGE Cyanidation Testwork
Palladium and platinum are readily soluble in a cyanide leach
solution under certain chemical conditions. To assess the potential
of cyanide leaching as a means to recover PGEs at Pedra Branca,
three initial 48-hour hot cyanide leach tests were conducted at SGS
Lakefield, Ontario ("SGS"). These tests were conducted on: 1)
composite drill core sample from the Curiu 2PGE+Au deposit
(100,000oz at 1.93 g 2PGE+Au/t); 2) an outcrop sample from the
Trapia 2PGE+Au deposit (219,000oz at 1.19 g 2PGE+Au/t); and 3)
tailings material collected from the first Falcon UF Gravity
Concentrator test (see "Falcon UF Gravity Separation" below).
Recoveries of 84.4%, 88.5% and 91.7% Pd were achieved in 48-hour
leach experiments. See Table 1 below for a summary of cyanidation
results, and Table 2 below for a description of sample details.
The hot cyanide leach tests were performed with the following
conditions:
-- Grind size = 20-30 <MU>m (P80)
-- Pulp density = 33% solids (w/w)
-- Pulp temperature = 50degC
-- Cyanide concentration = 20 g/L NaCN (maintained)
-- Dissolved Oxygen = 20 mg/L (maintained)
-- Retention time = 48 hours
-- Kinetic solution subsamples assayed for Pt and Pd after 6, 24 and 48 hours
Table 1: Summary of Hot Cyanide Leach Results
Sample Tailing from Test % Extraction
Platinum Palladium
6 h 24 h 48 h 6 h 24 h 48 h
Curiu Core -- 1 2 2.6 81 88 91.7
Trapia West Outcrop -- 2 3 4.2 47 74 84.4
Curiu Core G1 5 5 7.2 83 90 88.5
Table 2: Description of Sample Details
Sample Type Source Weight Pd Pt Rh Au 3PGE+Au
Received (g/t) (g/t) (g/t) (g/t) (g/t)
Historical Drill Core Curiu Deposit 20-25 kg 3.83 6.86 0.25 0.24 11.2
Outcrop Curiu Deposit 20-25 kg 7.86 3.95 0.45 0.30 12.6
Outcrop Trapia West Deposit 20-25 kg 21.6 17.0 0.25 0.83 39.6
The strong leachability of Pd in all three tests warrants
subsequent cyanidation tests aimed at improving the performance of
Pt recoveries. The addition of chloride and/or iodine as an
additive in future testing may promote reaction activity and this
could positively impact the recoveries of both Pt and Pd.
About Cyanidation of PGEs
Further information about cyanide leaching can be found in the
link below:
https://www.sgs.ca/en/mining/metallurgy-and-process-design/cyanidation-technologies/cyanide-leaching
Falcon UF Gravity Separation
Previous mineralogical studies of Pedra Branca mineralized
ultramafic rocks suggest a very fine nature to the PGE minerals
(<9 micrometer ("<MU>m")) and thus multiple rounds of
testwork have been initiated to assess the potential to upgrade
feed material by means of a fine grind (-20 to -38 <MU>m)
followed by gravity separation using the Falcon UF Gravity
Concentrator. The primary objective is to scavenge ultra-fine
mineral particles that are typically rejected from conventional
gravity processing circuits as slimes.
The first round of Falcon UF testwork ("G1") was completed on a
sample of historical drill core from the Curiu 2PGE+Au deposit (NI
43-101 resource of 100,000oz 2PGE+Au at 1.93 g/t). A summary of the
samples tested is included in Table 2 above. Platinum responded
very favorably to Falcon UF Gravity concentration, with 73.3% Pt
separated into only 9.6% of the mass, 82.6% Pt separated into 32.1%
of the mass, and 57.8% Pt on the first mass pull (4.6% of the
mass). Palladium responded less favorably to Falcon UF
concentration, with 47.7% Pd recovered in 32.1% of the mass. See
Figure 1 and Table 3 below for a summary of G1 test results, which
were run under the following test protocols: 5 kg feed at -38
<MU>m, 10-15% solids with 3 litres/minute pulp feed rate.
-- 300 G-Force centrifugal pressure
-- Recover Pass 1 Concentrate and retain
-- Repass Pass 1 Tailing
-- Repeat for a total of 8 passes - expected mass recovery of 20-25% in total
-- Filter, dry and weigh all products and submit for assay (8
concentrates, 1 tailing), including Cr, Pt and Pd
-- Metallurgical balance relating mass recovery to PGE recovery
Figure 1: Summary Graph of G1 Falcon UF Gravity Test Results -
see Valore announcement
Table 3: Summary Table of G1 Falcon UF Gravity Test Results
Product Mass Assays, g/t Distribution %
g % Pt, g/t Pd, g/t Cr, % Pt Pd Cr
Pass 1 Concentrate 226.7 4.6 44.5 21.9 15.1 57.8 15.0 8.6
Pass 1+2 Concentrate 477.3 9.6 26.8 17.9 16.8 73.3 25.9 20.1
Pass 1-3 Concentrate 707.1 14.2 19.0 15.1 17.1 77.0 32.3 30.2
Pass 1-4 Concentrate 921.6 18.5 15.0 13.2 16.9 79.0 37.0 39.0
Pass 1-5 Concentrate 1121.0 22.5 12.5 11.9 16.4 80.2 40.4 46.1
Pass 1-6 Concentrate 1297.9 26.1 10.9 11.0 16.0 81.2 43.3 52.0
Pass 1-7 Concentrate 1455.6 29.2 9.8 10.3 15.6 82.0 45.5 56.9
Pass 1-8 Concentrate 1600.1 32.1 9.0 9.8 15.4 82.6 47.4 61.6
Given the strong performance of Pt concentration in the G1 test,
a subsequent round of Falcon UF concentration testwork ("G2") was
performed, aimed at further improving recoveries by a sequential
coarse-to-fine grind. G2 was designed to examine the response of
coarsely ground (100 um P80) material to standard gravity recovery
techniques (Wilfley table), followed by fine grinding of the
tailing (P80 = 20 um) and processing at high G-Force with the
Falcon UF test procedure. This assumes that the PGEs were
predominantly associated with chromite and that coarse chromite may
concentrate somewhat efficiently relative to the lighter matrix
minerals.
Platinum once again responded well to the combined Wilfley +
Falcon UF process, with 76.4% recovered in 30.6% of the mass
(Wilfley concentrate + Falcon pass 1 concentrate), and 86.9%
recovered in 56.1% of the mass in the combined Wilfley + 4 pass
Falcon concentrate. Palladium showed a slight improvement to G1
results, but required a higher mass pull, with recovery curves
flattening at 30% mass pull. The Wilfley stage did not show a
marked improvement on G1 results. See Valore announcement for
Figure 2 and Table 4 for summaries of the G2 test results.
The strong performance of Pt in both the G1 and G2 Falcon UF
gravity tests, combined with strong leachability of Pd seen in the
three cyanidation tests presents two highly complementary processes
to concentrate and recover Pd and Pt at Pedra Branca. High-priority
follow-up testwork is planned to further optimize conditions and
improve metallurgical recoveries.
About Falcon UF Gravity Separation
Further information about Falcon UF gravity separation can be
found in the link below:
https://minerals.seprosystems.com/equipment/falcon-uf-gravity-concentrators/
ABOUT SGS
SGS is the world's leading inspection, verification, testing and
certification company. SGS is recognized as the global benchmark
for quality and integrity. With more than 89,000 employees, SGS
operates a network of more than 2,600 offices and laboratories
around the world.
SGS fit-for-purpose solutions encompass the skills of qualified
geologists, geostatistician, analytical chemists, mineralogists,
metallurgists, process engineers and mining engineers brought
together to provide accurate and timely mineral and process
evaluation services across the entire mining life cycle.
Qualified Person (QP)
The technical information in this news release has been prepared
in accordance with Canadian regulatory requirements set out in NI
43-101 and reviewed and approved by Colin Smith, P.Geo., ValOre's
QP, who oversees New Project Review for ValOre.
About ValOre Metals Corp.
ValOre Metals Corp. (TSX -- V: VO) is a Canadian company with a
portfolio of high -- quality exploration projects. ValOre's team
aims to deploy capital and knowledge on projects which benefit from
substantial prior investment by previous owners, existence of
high-value mineralization on a large scale, and the possibility of
adding tangible value through exploration, process improvement, and
innovation.
In May 2019, ValOre announced the acquisition of the Pedra
Branca Platinum Group Elements (PGE) property, in Brazil, to
bolster its existing Angilak uranium, Genesis/Hatchet uranium and
Baffin gold projects in Canada.
The Pedra Branca PGE Project comprises 38 exploration licenses
covering a total area of 38,940 hectares (96,223 acres) in
northeastern Brazil. At Pedra Branca, 5 distinct PGE+Au deposit
areas host, in aggregate, a NI 43-101 Inferred Resource of
1,067,000 ounces 2PGE+ Au contained in 27.2 million tonnes grading
1.22 g/t 2PGE+Au (see ValOre's July 23, 2019 news release). PGE
mineralization outcrops at surface and all of the currently known
inferred resources are potentially open pittable.
Comprehensive exploration programs have demonstrated the
"District Scale" potential of ValOre's Angilak Property in Nunavut
Territory, Canada that hosts the Lac 50 Trend having a NI 43 -- 101
Inferred Resource of 2,831,000 tonnes grading 0.69% U(3) O(8) ,
totaling 43.3 million pounds U(3) O(8) . For disclosure related to
the inferred resource for the Lac 50 Trend uranium deposits, please
refer to ValOre's news release of March 1, 2013.
ValOre's team has forged strong relationships with sophisticated
resource sector investors and partner Nunavut Tunngavik Inc. (NTI)
on both the Angilak and Baffin Gold Properties. ValOre was the
first company to sign a comprehensive agreement to explore for
uranium on Inuit Owned Lands in Nunavut Territory and is committed
to building shareholder value while adhering to high levels of
environmental and safety standards and proactive local community
engagement.
On behalf of the Board of Directors,
"Jim Paterson"James R. Paterson, Chairman and CEO
ValOre Metals Corp.
For further information about, ValOre Metals Corp. or this news
release, please visit our website at valoremetals.com or contact
Investor Relations toll free at 1.888.331.2269, at 604.646.4527, or
by email at contact@valoremetals.com .
ValOre Metals Corp. is a proud member of Discovery Group. For
more information please visit: discoverygroup.ca
Neither the TSX Venture Exchange nor its Regulation Services
Provider (as that term is defined in the policies of the TSX
Venture Exchange) accepts responsibility for the adequacy or
accuracy of this release.
This news release contains "forward-looking statements" within
the meaning of applicable securities laws. Although ValOre believes
that the expectations reflected in its forward-looking statements
are reasonable, such statements have been based on factors and
assumptions concerning future events that may prove to be
inaccurate. These factors and assumptions are based upon currently
available information to ValOre. Such statements are subject to
known and unknown risks, uncertainties and other factors that could
influence actual results or events and cause actual results or
events to differ materially from those stated, anticipated or
implied in the forward-looking statements. A number of important
factors including those set forth in other public filings could
cause actual outcomes and results to differ materially from those
expressed in these forward-looking statements. Factors that could
cause the actual results to differ materially from those in
forward-looking statements include the future operations of ValOre
and economic factors. Readers are cautioned to not place undue
reliance on forward-looking statements. The statements in this
press release are made as of the date of this release and, except
as required by applicable law, ValOre does not undertake any
obligation to publicly update or to revise any of the included
forward-looking statements, whether as a result of new information,
future events or otherwise. ValOre undertakes no obligation to
comment on analyses, expectations or statements made by third
parties in respect of ValOre, or its financial or operating results
or (as applicable), their securities.
This announcement contains inside information for the purposes
of Article 7 of EU Regulation 596/2014. Upon the publication of
this announcement, this inside information is now considered to be
in the public domain.
ENDS
For further information please visit www.jangadamines.com or
contact:
Jangada Mines plc Brian McMaster (Chairman) Tel: +44 (0) 20
7317 6629
Strand Hanson Limited James Spinney Tel: +44 (0)20 7409
(Nominated & Financial Ritchie Balmer 3494
Adviser) Jack Botros
Brandon Hill Capital Jonathan Evans Tel: +44 (0)20 3463
(Broker) Oliver Stansfield 5000
St Brides Partners Charlotte Page Tel: +44 (0)20 7236
Ltd Beth Melluish 1177
(Financial PR)
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