African Gold Group, Inc. (TSX-V: AGG) (“
AGG” or
the “
Company”) is pleased to announce positive
test results from metallurgical testing on sulphide material from
its flagship Kobada Gold Project in southern Mali.
Highlights from the metallurgical
testing include:
- High average gold recoveries of 96.1%
- Sulphide ore is free milling (non
refractory)
- Current processing plant design (gravity + CIL) is well
sized to treat additional sulphide ore
Danny Callow, CEO, African Gold Group
states:
“From our ongoing drilling programme results, we
are confident that we have a sizeable sulphide resource sitting
below the oxides at our Kobada Gold Project. Based upon the
geological interpretation to date, this could be far larger than
the current oxide resource. Whilst we believe we have significant
upside in the oxides along strike, it made sense to test the
ability to treat the sulphides, especially those that fall within
the current open-pit shell and are classified as a
resource.
We could not be happier with the initial results
from the comprehensive testwork programme, which shows that not
only is the gold free milling, but that it displays optimal
recovery through the existing gravity + CIL circuit already
designed for the Kobada Gold Project oxides.
We are confident that some of our existing
345,000oz of sulphides as per our latest resource statement will
fall within our open-pittable reserves and therefore be added to
the overall reserve number as we seek to update the technical
report from our additional oxide drilling results and sulphide
testwork.”
Comprehensive metallurgical testing programme
was conducted by Maelgwyn South Africa (MSA) on composite samples
from all defined mineral zones (north, south, and central domains)
of the main shear zone.
The sulphide ore testwork programme involved the
following:
- Head grade assays (Multi Au x 3; Sg; As, Hg, S-package; Full
ICP scan)
- Diagnostic leach
- Comminution testwork - to be performed after a review of the
gold recovery results.
- Gravity recovery followed by intensive cyanidation on the
gravity concentrate.
- Cyanidation on the gravity middlings and tailings which
involved leach rate tests to determine the effect of time on gold
dissolution.
Intensive cyanidation on gravity
concentrate
The ILR tests indicate that a gold dissolution
of 96.37% over 6 hours is achieved and this is consistent with what
was obtained for saprolite and laterite. The current gravity
recovery equipment selection is adequately sized to recover gravity
gold from the sulphides.
Leach Time |
NaCN |
Recovery |
pH |
Sample |
Leached |
Dissolved Oxygen Measured |
|
Au |
|
Au |
Au |
DO |
|
Ppm |
% |
|
mg |
mg |
mg/L |
0 hrs |
20,000 |
0 |
11.64 |
0 |
0 |
15.93 |
1 hrs |
20,000 |
79.61 |
11.31 |
0.656 |
0.656 |
30.18 |
2 hrs |
20,000 |
91.48 |
11.16 |
0.753 |
0.098 |
22.49 |
4 hrs |
20,000 |
95.95 |
10.74 |
0.79 |
0.037 |
26.15 |
6 hrs |
20,000 |
96.37 |
10.47 |
0.794 |
0.003 |
21.71 |
7 hrs |
20,000 |
96.37 |
10.66 |
0.794 |
0 |
26.69 |
24 hrs |
20,000 |
96.37 |
10.6 |
0.794 |
0 |
|
Figure 1: Intensive cyanidation results
Leach results on middlings and
tailings
Time |
Reagent Addition |
Head |
Residue |
Carbon |
Reagent Consumption |
Dissolution (Calc) |
Account |
NaCN |
CaO |
Assayed |
Calc. |
Au |
Au |
NaCN |
Sol + Carbon |
Solid |
Au |
g/t |
Kg/t |
Au (g/t) |
Au (g/t) |
g/t |
g/t |
Kg/t |
Au % |
Au % |
% |
2 hrs |
5,000 |
0.24 |
0.30 |
0.31 |
0.25 |
2 |
0.94 |
20.48 |
20.48 |
104.80 |
4 hrs |
0.24 |
0.30 |
0.29 |
0.14 |
5 |
0.94 |
51.05 |
51.05 |
95.33 |
6 hrs |
0.24 |
0.30 |
0.31 |
0.02 |
10 |
1.99 |
93.52 |
93.52 |
102.93 |
8 hrs |
0.24 |
0.30 |
0.33 |
0.02 |
11 |
1.84 |
93.92 |
93.92 |
109.73 |
12 hrs |
0.24 |
0.30 |
0.33 |
0.02 |
11 |
2.13 |
93.92 |
93.92 |
109.73 |
16 hrs |
0.24 |
0.30 |
0.30 |
0.02 |
10 |
2.54 |
93.38 |
93.38 |
100.67 |
18 hrs |
0.24 |
0.30 |
0.31 |
0.02 |
10 |
2.43 |
93.61 |
93.61 |
104.29 |
24 hrs |
0.24 |
0.30 |
0.31 |
0.02 |
10 |
2.38 |
93.55 |
93.55 |
103.39 |
36 hrs |
0.24 |
0.30 |
0.32 |
0.02 |
11 |
2.42 |
93.66 |
93.66 |
105.20 |
48 hrs |
0.24 |
0.30 |
0.32 |
0.02 |
11 |
2.59 |
93.66 |
93.66 |
105.20 |
Figure 2: Leach test rate
The following is noted regarding the results:
- Rate of gold dissolution is high and the rate curve “plateaued”
after 8 hours. An optimum residence time of 24 hours can be
selected. Current leach design residence time of 24 hours will be
more than adequate when treating sulphides.
- Lime requirements are low at 0.24kg/t- this is line with
expectations as sulphides generally contain carbonates which will
result in low lime demand.
- Cyanide optimization tests will be conducted to determine
cyanide consumptions for design and operating cost estimates.
Ongoing comprehensive testwork will include
additional comminution testing to determine optimal grind size,
leach optimisation and further variability testing.
TSXV Final Approval
The Company is also please to announced that it
has receive final approval from the TSX Venture Exchange with
respect to the closing of the $4.6 million private placement of
units of the Company (the “Offering”) (see press release dated
February 24, 2021). As a matter of clarification, all warrants
comprising the units of the Company issued under the Offering
expire on February 24, 2023. Additionally, in connection with the
closing of the Offering, the Company has paid aggregate finder’s
fees of $115,757.50 in cash and 776,832 finder’s warrants
(“Finder’s Warrants”) to certain finders.
About African Gold Group
African Gold Group is a TSX Venture Exchange
(TSX-V: AGG) listed exploration and development company with a
focus on building Africa’s next mid-tier gold producer. The Company
has a highly experienced board and management team with a proven
track record in the African mining sector operating mines from
development through to production. AGG’s principal asset is the
Kobada Project in southern Mali, which is in an advanced stage of
development having completed the 2020 definitive feasibility study
and is targeting gold production of 100,000 oz per annum. As well
as the initial Kobada Gold Project, other exploration locations
have been identified on the Kobada, Farada and Kobada Est
concessions, offering potential for an increase in resource. For
more information regarding African Gold Group visit our website at
www.africangoldgroup.com.
Qualified Person
The scientific and technical information
contained in this press release has been reviewed, prepared and
approved by Dr. Andreas Rompel, PhD, Pr. Sci. Nat. (400274/04),
FSAIMM, Vice President Exploration of AGG, who is a "Qualified
Person" as defined by National Instrument 43-101 - Standards of
Disclosure for Mineral Projects.
For more information:
Danny Callow President and Chief Executive
Officer+(27) 76 411 3803 Danny.Callow@africangoldgroup.com
Scott EldridgeNon-Executive Chairman of the
Board(604) 722-5381Scott.Eldridge@africangoldgroup.com
Daniyal Baizak VP Corporate Development(416)
861-2267Daniyal.Baizak@africangoldgroup.com
Camarco (Financial PR) Gordon Poole Nick Hennis +44 (0) 20 3757
4997 AfricanGoldGroup@camarco.co.uk
Cautionary statements
This press release contains “forward‑looking
information” within the meaning of applicable Canadian securities
legislation. Forward‑looking information includes, but is not
limited to, statements regarding, gold recoveries from the Kobada
Gold Project, inclusion of sulphides into reserves and resources of
the Kobada Gold Project, grant of incentive stock options and the
Offering. Generally, forward‑looking information can be identified
by the use of forward-looking terminology such as “plans”,
“expects” or “does not expect”, “is expected”, “budget”,
“scheduled”, “estimates”, “forecasts”, “intends”, “anticipates” or
“does not anticipate”, or “believes”, or variations of such words
and phrases or statements that certain actions, events or results
“may”, “could”, “would”, “might” or “will be taken”, “occur” or “be
achieved”. Forward‑looking information is subject to known
and unknown risks, uncertainties and other factors that may cause
the actual results, level of activity, performance or achievements
of AGG to be materially different from those expressed or implied
by such forward‑looking information, including but not limited to:
receipt of necessary approvals; general business, economic,
competitive, political and social uncertainties; future prices of
mineral prices; accidents, labour disputes and shortages and other
risks of the mining industry. Although AGG has attempted to
identify important factors that could cause actual results to
differ materially from those contained in forward-looking
information, there may be other factors that cause results not to
be as anticipated, estimated or intended. There can be no assurance
that such information will prove to be accurate, as actual results
and future events could differ materially from those anticipated in
such statements. Accordingly, readers should not place undue
reliance on forward‑looking information. AGG does not undertake to
update any forward-looking information, except in accordance with
applicable securities laws.
This news release does not constitute an offer
to sell or a solicitation of an offer to buy any of the securities
in the United States. The securities have not been and will
not be registered under the United States Securities Act of 1933,
as amended (the “U.S. Securities Act”) or any state securities laws
and may not be offered or sold within the United States or to U.S.
Persons unless registered under the U.S. Securities Act and
applicable state securities laws or an exemption from such
registration is available.
NEITHER 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.
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