is the normal effect of grade reduction from idealized that occurs when mining takes place. Some dilution, or non-mineralized material below an "ideal cut", is mined and sent to the mill along with the ore.
mixing of economic grade material with non-economic grade or waste material in the mining process
Incorporation of low grade mineralization or waste rock with ore during mining operations.
Waste, which is mined with ore in the mining process.
A lowering of the grade of ore being mined when waste rock or low-grade ore is included unavoidably in the mined ore.
The contamination of ore with barren wall rock during stoping operations.
Waste which is mixed with ore in the mining process.
Waste which is commingled with ore in the mining process
The undesirable but often unavoidable mixing of ore body and sterile surrounding rock during the mining process which effectively lowers the gold grade.
The contamination of ore with barren wall rock in stoping. The assay of the ore after mining is frequently 10% lower than when sampled in place.
an estimate of the amount of waste or low-grade mineralized rock which will be mined with the ore as part of normal mining practices in extracting an orebody
Mixing of ore grade material with non-ore grade waste material in the mining process.
Rock that is, by necessity, removed along with the ore in the mining process, subsequently lowering the grade of the ore.
Incorporation of low grade or waste material into the mined ore as a function of the mining process
The contamination of ore with barren wall rock in stopping.
The effect of waste or low-grade ore being included unavoidably in the mined ore, lowering the recovered grade.