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Radisson intersects high grade 250m below defined resources at O'Brien

Oct 14, 2020

Radisson Mining Resources has announced significant high-grade gold intercepts from the ongoing 60,000 m exploration drill program at its O’Brien gold project located along the Larder-Lake-Cadillac Break, halfway between Rouyn-Noranda and Val-d’Or in Quebec.


Step-out drilling highlights resource growth potential 250 m below currently defined resources on the second mineralized trend(600 m east of the old O’Brien Mine)

  • Hole OB-20-156 intersected 6.89 g/t Au over 21.10 m including; 
    • 4.81 g/t Au over 2.00 m (760 m vertical depth)
    • 11.32 g/t Au over 11.80 m (775 m vertical depth) which includes: 
      • 38.11 g/t Au over 2.10 m 
      • 20.39 g/t Au over 2.30 m
  • OB-20-156 represents the deepest hole drilled to test the second trend as part of the ongoing drill campaign and appears to have intersected at least three distinct high-grade mineralized structures almost 250 m below the boundary of current resources in the area.
  • The intercepts were obtained 355 m down-plunge from a previously released intercept grading 8.35 g/t Au over 6.00 m (Hole OB-20-124).
  • Current resources in this area are largely limited to a vertical depth of 400 m. Drilling so far suggests continuity of mineralization to a vertical depth of almost 700 m based on today’s results as well as previously released holes OB-20-124 and OB-19-106 (14.30 g/t Au over 2.00 m and 22.17 g/t over 1.80 m).
  • In addition, results from the ongoing campaign appear to tie in with high-grade resources above 400 m, and within a high-grade mineralized trend that could possibly extend further to approximately 1,100 m where a deeper historical intercept returned 17.46 g/t over 1.00 m.
  • Assays are pending for wedge holes OB-20-156W1, OB-20-156W2 and additional drill holes completed with the objective of exploring the down-plunge continuity and expanding current resources in the area.

See Figure 1. OB-20-156: Au grade distribution

Deep drilling on the first mineralized trend (300 m east of the old O’Brien Mine) intersects mineralized structures including visible gold approximately 400 m below the current resource boundary

  • Assays are pending for recently completed hole OB-20-174 which intersected targeted mineralized structures from 915 m to 1,070 m vertical depth, including visible gold at 960 m vertical depth, representing 360 m below the boundary of defined resources on the first mineralized trend (see Visible gold in hole OB-20-174).
  • Resources defined in the first mineralized trend are limited to 600 m vertical depth, previously released results suggest continuity of high-grade mineralization below the resource boundary down to a depth of 950 m vertical depth, and in an area extending 300 m laterally and 350 m vertically.
  • Two wedge holes are planned with the objective of testing the continuity of mineralization above and to the east of OB-20-174.
  • Visible gold in hole OB-20-174 was obtained 130m below the previously released intercept of 66.71 g/t Au over 4.70 mobtained in hole OB-19-92w2b.
  • Recent results have also demonstrated the potential to laterally expand mineralization in the first mineralized trend to the east and west. This includes 45.33 g/t over 2.20 m (OB-20-148W1) in addition to a number of holes that intersected visible gold in mineralized structures and for which assays are pending (OB-20-164, OB-20-167, OB-20-168 and OB-20-170).

Drilling at O’Brien continues to validate the litho-structural model while highlighting resource growth potential laterally and at depth

  • Drilling to date has continued to define and expand three high-grade mineralized trends, located approximately 300 m, 600 m and 900 m respectively to the east of the old O’Brien Mine.
  • Mineralized trends identified bear similarities with structures previously mined at O’Brien down to a depth of 1,100 m (historical production of 587 koz grading 15.25 g/t)
  • Drilling so far has demonstrated continuity of mineralization well below the boundary of defined resources in all three trends, which remain open for expansion laterally and at depth.

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