Column Leach Test Results Exceed Expectations for the Cheechoo Gold Project, Quebec
February 03 2021 - 8:00AM
The management of
Sirios Resources Inc. (TSXV:
SOI) is pleased to announce the results of metallurgical tests that
were performed on approximately 500 kg of a composite sample
material, representative of gold mineralization on the Cheechoo
property. These tests, performed by the renowned firm KCA over
several months in Reno, Nevada, were completed in January 2021.
After 151 days of column leaching, with a
crushing size of 6.3 mm, gold recoveries were 80% at
20°C and 76% at 4°C (Table 1). The tests
were conducted at various temperatures to simulate conditions that
could be encountered in an environment simulating crushed and
stacked mineralized material in the Cheechoo Project area. The
average gold recovery results obtained were 78%,
which is higher than the typical gold recoveries for heap leach
projects (55-75%) according to the Canadian Mining Journal.1
The tests also showed that reagent consumption
remained low throughout the leaching process (average of 1.93 kg/t
NaCN).
Temp. |
Calculated Head Grade (g/t Au) |
Gold Extracted |
Consumption of NaCN (kg/t) |
Addition Cement (kg/t) |
Days of Leach |
Crush Size (mm) |
Crush Type |
20°C |
0.967 |
80 |
% |
2.45 |
2.02 |
151 |
6.3 |
HPGR2 |
4°C |
0.802 |
76 |
% |
1.40 |
2.02 |
Table 1: Summary of Column Leach Work
Dominique Doucet, founder and CEO of Sirios,
stated: "Several gold processing options are being evaluated for
the Cheechoo Project, including heap leach and conventional mill
treatment. However, the results released today are very encouraging
and clearly demonstrate that heap leach is a viable option for
recovering gold from the Cheechoo deposit. Now that these tests
have been completed, the next step for the project will be to
conduct a definition drilling program planned for the summer of
2021, with the goal of completing a Preliminary Economic Assessment
(PEA) study thereafter.”
About heap leaching
Column leach tests are metallurgical tests
specifically designed to evaluate the gold recovery rate using the
heap leach extraction method.
Heap leaching is a method of recovering precious
metals that is widely used throughout the world, particularly in
the United States (Nevada, Colorado, Alaska). It is also the method
used at the Eagle Gold mine in the Yukon (operated by Victoria
Gold), one of the most recent gold mines to go into production in
Canada (2020). In addition to mining a style of mineralization,
similar to that of Cheechoo (free gold from a Reduced
Intrusion-related Gold System), the Eagle Gold mine is located in
northern Canada and operates in cold weather conditions similar to
those found on the Cheechoo property.
When the type of mineralization is appropriate
(which seems to be the case for Cheechoo), heap leaching is a
simple, low-cost process that can be very advantageous as it can
result in significant savings in capital expenditures (CAPEX) and
operating costs (OPEX), which can significantly improve a project's
economics.
The scientific and technical content of this
press release has been reviewed and approved by Dominique Doucet,
P.Eng. President and CEO of Sirios Resources Inc. and Jordi
Turcotte, P.Geo., Senior Geologist, Qualified Persons as defined by
NI 43-101.
About the Cheechoo Property
The Cheechoo gold property, wholly-owned by
Sirios, is located in Eeyou Istchee James Bay, Quebec, less than 9
km from Newmont’s Eleonore gold mine. The latest resource estimate
for the Cheechoo project (October 2020) estimated an inferred
resource of 2.0 million ounces of gold contained in 93.0 million
tonnes of rock at an average grade of 0.65 g/t Au, with significant
potential to increase this resource.3
About Sirios
A pioneer in the discovery of significant gold
deposits in Eeyou Istchee James Bay, Quebec, Canada, Sirios
Resources Inc. is focusing primarily on its Cheechoo gold
discovery, while actively exploring for the gold potential of its
other properties.
Forward-Looking Statements:
This news release contains "forward-looking
information" within the meaning of applicable Canadian securities
legislation based on expectations, estimates and projections as at
the date of this news release. Forward-looking information involves
risks, uncertainties and other factors that could cause actual
events, results, performance, prospects and opportunities to differ
materially from those expressed or implied by such forward-looking
information. Factors that could cause actual results to differ
materially from such forward-looking information include, but are
not limited to, capital and operating costs varying significantly
from estimates; the preliminary nature of metallurgical test
results; delays in obtaining or failures to obtain required
governmental, environmental or other project approvals;
uncertainties relating to the availability and costs of financing
needed in the future; changes in equity markets; inflation;
fluctuations in commodity prices; delays in the development of
projects; the other risks involved in the mineral exploration and
development industry; and those risks set out in the Company’s
public documents filed on SEDAR at www.sedar.com. Although the
Company believes that the assumptions and factors used in preparing
the forward-looking information in this news release are
reasonable, undue reliance should not be placed on such
information, which only applies as of the date of this news
release, and no assurance can be given that such events will occur
in the disclosed time frames or at all. The Company disclaims any
intention or obligation to update or revise any forward-looking
information, whether as a result of new information, future events
or otherwise, other than as required by law.
Neither TSX Venture Exchange nor its Regulation
Services Provider (as that term is defined in the Rules of the TSX
Venture Exchange) accepts responsibility for the adequacy or
accuracy of this release.
Contact :Dominique Doucet, President, CEO,
Eng.Tel. : (514) 918-2867ddoucet@sirios.comwebsite
: www.sirios.com
1 Canadian Mining Journal, 2020-09-01, « Sorting through
the heap »,
www.canadianminingjournal.com/features/sorting-through-the-heap 2
High Pressure Grinding Rolls3 BBA, Mineral Resource Estimate Update
for The Cheechoo Project, 31/10/2020
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