Sirios obtains up to 97% gold recovery including 88% by gravity on the Cheechoo project
TSX-V : SOI September 3, 2019
Sirios obtains up to 97% gold recovery including 88% by
gravity on the Cheechoo project
MONTREAL, QUEBEC - 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, s tated: "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 communition 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.
-30-
To contact us:
Sirios Resources Inc.
Dominique Doucet, Eng., President, CEO [email protected]
Tel.: (514) 510-7961