RETRANSMISSION - Sirios obtains up to 97% gold recovery including 88% by gravity on the Cheechoo project
September 03 2019 - 9:00AM
Management of SIRIOS (TSX-V:SOI) is pleased to announce the
positive results of the Phase I metallurgical testing undertaken by
COREM. Gold recovery rates up to 97% were obtained, including 88%
by gravity as shown in the table below. The tests were conducted on
three composite samples of PQ drill core, each of approximately 130
kg.
Gold
recovery by gravity and tailing cyanidation |
Sample # |
Lithology |
Head grade (Au g/t) |
Gold Recovery (%) |
Grade obtained (Au g/t) |
Gravity |
Tailing Cyanidation |
Total |
9 |
Tonalite |
0.56 |
81.4 |
15.2 |
96.6 |
0.92 |
12 |
Pegmatite |
3.06 |
88.0 |
9.1 |
97.1 |
2.81 |
26 |
Meta-greywacke |
0.27 |
56.5 |
34.5 |
91.0 |
0.31 |
The tonalite, sample #9 represents approximately
70% of the gold mineralization on Cheechoo. Samples # 12 and 26
represent respectively approximately 20% and 5% of the gold
mineralization.
The grades obtained from the metallurgical tests
show a significant increase compared to the head grades for the
low-grade samples #9 and #26, while a slight decrease is observed
for the sample #12. A population of 3 samples is however, not
sufficient to define a general trend, further studies of variations
in gold grade will be conducted when Phase II of the metallurgical
testing will be completed and available.
Dominique Doucet, President, stated: "We are
very encouraged by the results of these metallurgical tests which
show that the type of gold mineralization in Cheechoo is easy to
extract and has high recovery rates."
Gold recovery by gravity (GRG) tests undertaken
in Phase I, were conducted following the standard procedure
developed by the late André Laplante, PhD, involving three
successive separation steps with re-grinding between each step.
The tests also demonstrated the potential to
concentrate the sulfides in the tailings of the gravity process
using flotation. Note that there is a very low sulfides content, in
the order of less than 0.2%, in the tailings from the treatment of
Cheechoo samples.
Cyanidation tests via direct feed, demonstrate a
low consumption of reagents, in the range of 0.19 and 0.58 kg/t of
NaCN, and 0.56 and 1.09 kg/t of Ca(OH)2.
The whole of each sample was used for the
comminution tests. Approximately 30 kg was used for
gravity-testing, while 70 kg was used for cyanidation recovery
tests at different granulometries, as well as quantitative
mineralogy and gold deportment studies. The completed tests allowed
the company to determine the granulometry, being P80 75 μm, to
be used for the treatment of the 30 additional composite samples
that constitute Phase II of the work currently underway at COREM.
All thirty-three samples have a total mass of 5.5 tonnes (ref.
press release of November 5, 2018).
Jordi Turcotte, MSc., Geo., and Dominique
Doucet, P. Eng., Qualified Persons pursuant to National Instrument
43-101, prepared and verified the technical information of this
press release, as well as reviewed the final text.
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.To contact us:Sirios Resources
Inc.Dominique Doucet, Eng., President, CEO
ddoucet@sirios.com Tel.: (514)
510-7961
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