What a cracker of a hole - can't wait to see the next batch
Highlights
• Following the receipt of final assays for NAD012, the C2 vein system now gives three potential MCOG (mineable cut-off grade) stopes: o 2.6m EHT (estimated horizontal thickness) at 11.6 g/t AuEq (gold equivalent) in C2 East; o 2.0m EHT at 13.7 g/t AuEq in C2 Middle (hinge zone); and o 2.4m EHT at 21.1 g/t AuEq in C2 West.
• The NAD012 hole also intersected a potential MCOG C1 stope, extending the strike length of the C1 vein system to 100m: o 1.2m EHT at 5.2 g/t AuEq in C1 West
• All 12 high-grade intersections to date within the MCOG zones of the C1 and C2 vein systems average 16.4 g/t AuEq (6.0% Sb (antimony), 5.0 g/t Au (gold)
''The strike length of the C1 vein system is now currently around 100m. The vertical extent of the C1 vein system is currently around 200m but could increase substantially, to 1,000m or more, with extensive further drilling – initially from surface and later from underground. The Fosterville epizonal mineralisation extends to more than 1,000m vertical depth and the Costerfield epizonal mineralisation is approaching 1,000m vertical depth.''
So when NAG talk about stopes this is what they have in mind
Considerations for Creating Stopes
When creating stopes, it is common practice to dig vertical shafts down to the orebody. Once the ore is reached, horizontal levels are created to mine the ore. These levels are where stoping occurs.
When creating a stope, miners consider the following:
Depending on the orebody orientation, an underground mining technique will be selected to extract the greatest amount of ore from a stope.
- The grade of the ore
- The width of the ore
- The incline of the ore (tilted, vertical, or flat)
- The strength of the surrounding rock
- The cost for supporting the mine roofs
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