IDM Mining Announces Resource Update at Red Mountain and Reports Significant Increase in Measured and Indicated Resources and Boosts Gold Grade

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Jan 23, 2017) - IDM Mining Ltd. (TSX VENTURE:IDM) ("IDM" or the "Company") is pleased to announce the results of an updated resource estimate for the Red Mountain Gold Project ("Red Mountain" or the "Project"), located in northwestern British Columbia near the town of Stewart, BC. The updated resource includes the results from additional drilling completed by IDM during 2016 which expanded mineralization along strike to the north, south, and down-dip, as well as additionally upgrading previous inferred resources. This estimate has yielded a 32% increase in contained Measured & Indicated ("M&I") gold ounces, and an increase in average grade from 8.36 g/t to 8.75 g/t Au. The resource estimate is authored by Dr. Gilles Arseneau, P.Geo and Andrew Hamilton, P.Geo with input from IDM's technical team.

The 2017 updated resource estimate at a 3.0 g/t Au cut-off represents an increase from the 2016 estimate by 142,200 oz Au and 275,900 oz Ag in the M&I categories. Resources in the Inferred category decreased by 42,700 oz Au and 48,200 oz Ag.

Rob McLeod, President and CEO, stated "Our 2016 drilling program was successful in expanding mineralization in all of the major mineralized zones, as well as demonstrating excellent continuity of wide zones of high-grade gold mineralization. Future underground drilling from the production-sized decline will continue to step-out in all directions, including targeting the northern extension of the mineralized trend, which can be traced a further 800 meters to the north of the current resources."

"This updated resource model will now be handed over to our Feasibility Study team to be incorporated into a revised and expanded mine design," said Michael McPhie, Executive Chairman of IDM Mining. "What is important to recognize about this revised and expanded resource update is it was made possible through a modest resource expansion drilling program during 2016."

Resource Estimate

The updated mineral resources for the Red Mountain Project are reported at a 3.0 g/t Au cut-off effective January 23, 2017.

Classification

Tonnage

Au (g/t)

Ag (g/t)

Oz Au

Oz Ag

Measured

1,246,000

9.40

30

376,400

1,194,000

Indicated

828,700

7.78

17

207,300

461,700

Measured + Indicated

2,074,700

8.75

25

583,700

1,655,700

Inferred

324,700

6.21

10

64,800

105,500

The resource update incorporates information from previous drilling, as well as infill and step-out holes completed during 2016. Mineralization was primarily modelled using an approximate minimum 2.5 g/t gold grade, with consideration for sulphide type and abundance. An extensive quality control and quality assurance ("QA/QC") review was completed on all 2016 and previous exploration work and a comparative analysis was performed on drill hole data, underground bulk sampling and geology.