What is the standard unit for grade in hard rock deposits, and how is it converted to ounces per ton?

What is the standard unit for grade in hard rock deposits, and how is it converted to ounces per ton?

• A. The standard unit is ounces per ton; conversion to grams per tonne is approximately 0.0321 g/t.
• B. The standard unit is pounds per ton; conversion to ounces per ton is approximately 2 oz/ton per lb.
• C. The standard unit is kilograms per cubic meter; conversion to oz/ton is not defined.
• D. The standard unit is grams per tonne (g/t); conversion to ounces per ton is approximately 0.02917 oz/ton per g/t.

Answer: (D)