• Drill hole #99 intersected a near surface interval of 10.6 m at 11.2 g/t Au, including two intervals with visible gold of one metre each at 63.3 g/t Au and 50.5 g/t Au.
  

Drill hole #95, located in the West area, was assayed in priority and assay results were published previously (see March 6, 2017 press release).

The winter drilling campaign on Cheechoo ended mid-April. A total of 5,397 meters was drilled in fourteen drill holes (#94 to #107) and four extensions at depth (#36E, 37E, 58E and 82E). Three drill holes (#82E, #94 and #98) reached depths of 500 to 750 metres in order to test the interpreted tonalite/meta-sediments contact. They did intersect the contact which is mainly made of a sequence of alternating sediments and tonalite.

Assay results from drill holes # 36E, 37E, 82E, 94, 98 and 100 to 107 are still pending or being compiled. A table of all assays encompassing described intervals in the table above is available on the Sirios website at the following link:

http://sirios.com/files/Drill-holes-details.pdf

A location map of drill holes as well as their coordinates are available at following links:

http://sirios.com/images/carte-2017-05-09.jpeg

http://sirios.com/files/Coordinates.pdf

Sirios's fully owned Cheechoo property is located at Eeyou Istchee James Bay, Quebec, at 800 km north of Montreal, 200 km east of Wemindji and less than 10 km of the Éléonore goldmine of the producer Goldcorp.

Assay quality control

All NQ drill cores were described by Sirios personnel at the Cheechoo exploration camp. They were then sent to Rouyn-Noranda to be sawed in half, with one half sent to a commercial laboratory for assaying and other half retained as future reference. A strict QA/QC program was followed by integrating blanks and standards to core samples sequence, all of which were prepared by Services Technominex Inc. of Rouyn-Noranda. They were then assayed for gold by fire assay and atomic absorption finish by Actlabs in Ste-Germaine-Boulé, close to Rouyn-Noranda. Samples grading more than 3 g/t were repeated at the lab. Drill core samples with visible gold or from suspected gold zones were assayed by pyro-analysis with metallic sieve from a sample of about 1 kg.

Jordi Turcotte, MSc., Geo. and Jacquelin Gauthier, Geo., Qualified Persons pursuant to National Instrument 43-101, have prepared and verified the technical information of this press release, as well as reviewing the final text.

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