The minimum metal grade at which a tonne of rock can be processed on an economic basis.
(4) the lowest grade of mineralized material in a given deposit that qualifies as ore. Used in the calculation of ore reserves.
The grade at which the ore-body is mined with no profit or loss, i.e. the breakeven grade.
The lowest grade of mineralized material that qualifies as ore in a given deposit. The grade above which minerals are considered economically mineable considering the following parameters: estimates over the relevant period of mining costs, ore treatment costs, general and administrative costs, smelting and refining costs, royalty expenses, byproduct credits, process and refining recovery rates and PGM prices.
The gold grade below which mineralized material cannot be exploited profitably.
The lowest grade of mineralised material considered economic to extract; used in the calculation of the ore reserves in a given deposit.
The lowest payable grade of gold-bearing ore below which it is unprofitable to mine.
The minimum grade at which a unit of ore will be mined so as to achieve a required mining grade and hence a desired economic outcome.
the lowest grade of mineral resources considered economic; used in the calculation of reserves in a given deposit
A grade level below which the material is not “ore” and considered to be uneconomical to mine and process. The minimum grade of ore used to establish reserves.
Percentage grade of contained mineral which at recovery from an orebody is deemed economic. The cut-off grade is determined by the following formula parameters: estimates over the relevant period of mining costs, ore treatment costs, general and administrative costs, refining costs, royalty expenses, process and refining recovery rates and mineral prices.
the lowest grade of mineralized material considered to be economic and used to calculate the ore reserve in a deposit
