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SOI.V ·

Sirios obtains 23.5 g/t Au* over 3.1 metres at surface on Cheechoo

Drill Results

TSX-V : SOI October 3, 2017

Sirios obtains 23.5 g/t Au* over 3.1 metres at surface on Cheechoo

MONTREAL – Management of SIRIOS (TSX -V : SOI) is pleased to announce the first series of

prospecting results from channels sampling undertaken recently on the Cheechoo gold property. Gold has

been observed in trench 2-2 that yielded an interval of 3.1 m at 23.5 g/t Au* (45.5 g/t uncut grade) in an

interval of 21.6 m at an average grade of 4.0 g/t Au* (7.1 g/t uncut grade). A grade of 112 g/t Au over

1.1 m is included in these intervals. The channel is perpendicular to the geological structures which implies

that the 21.6 metres interval is close to true width.

*: grade cut at 50 g/t Au.

Trench 2-2 is located at around 150 metres north of the main stripped area, the auriferous mineralization

is found at the contact between meta-sedimentary rocks and a tonalite dyke. Gold is found both in tonalite

dyke and m eta-sedimentary rocks being crosscut by pegmatites or folded quartz-feldspar veins and

veinlets. The auriferous mineralization observed in the trench is similar to those observed in other channels

and a dozen drill holes including drill hole #52 (press release March 29 and June 8, 2016), located up to

300 metres south. All these drill holes (#12, 54, 60, 61, 62, 65, 70, 83, 86) show a continuity of auriferous

mineralization along the contact of meta -sedimentary rocks and the tonalite. Other drill holes testing

trench 2-2 extensions laterally and at depth, will be undertaken in the currently ongoing drilling campaign.

Discovery of the Mafic Dyke showing

The prospecting led to the discovery of the Mafic Dyke gold showing with a channel grading 1.2 g/t Au

over 3.7 m. The showing is located at approximately 1.3 km north-west of the main stripped area. All the

channel samples from this roughly 100 m 2 area yielded a weighted average of 0.8 g/t Au. Gold is

associated with tonalite crosscut by a two-metre wide mafic dyke. Additional fieldworks of stripping and

sampling will be undertaken in this new area.

A location map of surface gold showings and maps of trench 2- 2 and Mafic Dyke showing are available

at following links :

http://sirios.com/maps/indices.jpg

http://sirios.com/maps/t22.jpg

http://sirios.com/maps/dyke.jpg

A dozen of trenches were undertaken in a 2 km radius on the main stripped area. Trenches were dug on

locations where overburden permitted, to gain a better understanding of the auriferous mineralization.

Currently, 1,320 channel samples, mostly from the main stripped area are being assayed along with a little

less than 100 selected grab samples. The prospecting of north and southeast ends of the property, at more

than 7 km and at more than 3 km respectively from the main stripped zone, didn’t yield significant results.

The Cheechoo gold project is located in Eeyou Istchee James Bay, Quebec, 800 km north of Montreal,

Quebec, Canada, at 200 km east of Wemindji and less than 10 km from the Eleonore gold mine of producer

Goldcorp. Sirios received the award of Discovery of the year 2016 by Quebec Mineral Exploration

Association for its Cheechoo gold discovery.

Assay quality control

All rock samples were described by Sirios personnel at the Cheechoo exploration camp or at their sampling

location. They were then sent to a commercial laboratory for assaying. A strict QA/QC progra m was

followed by integrating blanks and certified standards by Sirios personnel. They were then assayed for

gold by fire assay and atomic absorption finish by Actlabs in Ancaster, Ontario. Samples with visible gold

as well as samples from trench 2 -2 were assayed by pyro -analysis with metallic sieve from a sample of

about 1 kg.

Jordi Turcotte, MSc., Geo., and Dominique Doucet, Eng. President of Sirios, Qualified Person pursuant

to National Instrument 43-101, prepared this press release.

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

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For more information, contact:

Dominique Doucet, Eng., President, CEO

[email protected] Tel.: (514) 510-7961

Website: www.sirios.com Fax: (514) 510-7964