general copper ore cut off grade

INTERNAL REVENUE SERVICE NATIONAL OFFICE . NATIONAL OFFICE TECHNICAL ADVICE MEMORANDUM August ... cut-off grade are placed on leach piles. Ore with Metal 1 above ... is very good and the amount of copper ... Ore Deposits class notes - ORE DEPOSITS Ore is a ... Various economic and sometimes political considerations will determine the lowest grade of ore that can be mined at a profit, this is termed cut-off grade ... general ... Carpathian files NI 43-101 technical report on the Rovina ... Carpathian files NI 43-101 technical report on the Rovina Valley Project, Romania, which details a ... copper mineralization (see grade cut-off ... general concepts ...    Read More

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