90% Gold Recovery Attained at Buckreef Oxide Test Plant
September 08 2021 - 6:00AM
Tanzanian Gold Corporation (TSX:TNX) (NYSE American:TRX) (TanGold
or the Company) (operating through its wholly owned subsidiary in
Tanzania) is pleased to announce that 90% gold recovery has been
attained on a consistent basis at the oxide test plant at Buckreef
Gold Company Limited’s (Buckreef Gold) project.
As previously disclosed in the Company’s Q3 2021
Management Discussion and Analysis (Q3-MD&A), the focus of the
oxide test plant in the final two months was on recovery rates
utilizing similar retention time and grind size design parameters
as the 15 tonne per hour (tph) (360 tonnes per day (tpd)) and 40+
tph (960+ tpd) expansions. The results of the gold
recovery tests are above the gold recovery rates previously
achieved at the oxide test plant, when the goal was to maximize
gold production versus maximizing gold recovery rates. These higher
gold recovery rates provide increased confidence in an already
robust oxide mine plan. Higher gold recoveries increase revenue per
tonne and lower costs per gold ounce versus lower gold recovery
rates.
Highlights
- 90% gold recovery systematically
attained at the Buckreef Gold oxide test plant;
- Grindability of 85% passing 75µ
(microns) screen aperture and retention times averaging 33 hours
significantly improve gold recovery;
- The 90% gold recovery exceeds
previously achieved and disclosed gold recovery rates; and
- Test plant studies are now complete
for the oxide mill feed.
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/86d4b3c6-73a9-488f-87c6-d65f4194e52b
“The results of the focused oxide test plant
aimed at maximizing recovery of the oxide mill feed have
conclusively demonstrated 90% gold recoveries. I am delighted with
the results and look forward to the finalization and commissioning
of the 15 tph (360 tpd) operation,” noted Stephen Mullowney,
CEO.
Methodology
The Buckreef Gold test plant process sampling
involved taking the leach feed and tails pulp (slurry) samples on a
shift basis (day and night shift). A one-liter scoop was taken
after each hour in a shift to make a composite of twelve liters per
shift. This composite was homogenized and two liters of the
slurry sample shipped to the analytical laboratory (METLAB AFRICA –
in Geita, Tanzania) for aqua regia gold analysis. The sample was
filtered and gold assayed in both solids and solution. The final
gold grade in the feed and tails being obtained by the calculation
that combines both solid and solution assay with the slurry percent
solids value. 95 samples were analyzed between July and August
2021.
The laboratory pulverized the solid sample and
took 50g sub sample for analysis. The rest of the sample is packed
as a ‘reject sample’ and returned to site for quality checks.
Twenty samples were selected for re-assay at the second lab (SGS -
Mwanza). The samples included ten feed solids samples and 10 tails
solids samples. The 20 samples were analyzed by the aqua regia
method, and the obtained results were compared to the ones reported
by METLAB AFRICA lab and used to calculate the gold recovery as
previously discussed. The second set of samples substantiated the
original assay samples.
Both laboratories have comprehensive internal
QA/QC controls.
About Tanzanian Gold Corporation
Tanzanian Gold Corporation along with its joint
venture partner, STAMICO is building a significant gold project at
Buckreef in Tanzania that is based on an expanded Mineral Resource
base and the treatment of its mineable Mineral Reserves in two
standalone plants. Measured Mineral Resource now stands at 19.98MT
at 1.99g/t gold containing 1,281,161 ounces of gold and Indicated
Mineral Resource now stand at 15.89MT at 1.48g/t gold containing
755,119 ounces of gold for a combined tonnage of 35.88MT at 1.77g/t
gold containing 2,036,280 ounces of gold. The Buckreef Project also
contains an Inferred Mineral Resource of 17.8MT at 1.11g/t gold for
contained gold of 635,540 ounces of gold. The Company is actively
investigating and assessing multiple exploration targets on its
property. Please refer to the Company’s Updated Mineral Resources
Estimate for Buckreef Gold Project, dated May 15, 2020, for more
information.
Tanzanian Gold Corporation is advancing on three
value-creation tracks:
- Strengthening its balance sheet by
expanding near-term production to 15,000 - 20,000 oz. of gold per
year from the processing of oxide material from an expanded oxide
plant.
- Advancing Sulphide Development for
a stand-alone plant that is substantially larger than previously
modelled and targeting significant annual gold production.
- Continuing with a drilling program
to further test the potential of its property, Exploration Targets
and Mineral Resource base by: (i) infill drilling to upgrade
Mineral Resources currently in the Inferred category in Buckreef
Main; (ii) step-out drilling in the northeast extension of Buckreef
Main; (iii) infill drilling program of Buckreef West; (iv) develop
exploration program for the newly discovered Anfield Zone; (v)
upgrade historical resources at Bingwa and Tembo; (vi)
identification of new prospects at Buckreef Gold Project and in the
region.
For further information, please contact Michael Martin, Investor
Relations, m.martin@tangoldcorp.com, 860-248-0999, or visit the
Company website at www.tangoldcorp.com
Andrew M. Cheatle, P.Geo., the Company’s COO and
Director, is the Qualified Person as defined by the NI 43-101 who
has reviewed and assumes responsibility for the technical content
of this press release.
The Toronto Stock Exchange and NYSE American
have not reviewed and do not accept responsibility for the adequacy
or accuracy of this release.
This press release contains certain
forward-looking statements as defined in the applicable securities
laws. No assurance can be given that Tanzanian Gold will be able to
achieve the same level of gold recovery in the future as it did at
the test oxide test plant during the months of July and August
2021. The actual achievements of Tanzanian Gold or other future
events or conditions may differ materially from those reflected in
the forward-looking statements due to a variety of risks,
uncertainties and other factors. These risks are set forth under
Item 3.D in Tanzanian Gold’s Form 20-F for the year ended August
31, 2020, as amended, as filed with the SEC and other reports that
we subsequently file with the SEC. You can review and obtain copies
of these filings from the SEC's website at
http://www.sec.gov/edgar.shtml.
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