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Definitions (22)
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assay
The chemical analysis of an ore, mineral, concentrate of metal to-determine the amount of valuable species. Precious metals are usually given in ounces per short ton or grams per metric tonne, while base metals are given in percentage.
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bornite
Bornite is an important copper ore mineral. It ranks up there with many of the other copper ores such as chalcocite, chalcopyrite, covellite, digenite, cuprite and tetrahedrite. Bornite copper content is 50% atomic ratio.
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chalcopyrite
Chalcopyrite (or copper pyrite), is one of the minerals refered to as "Fool's Gold" because of its bright golden color. As a copper ore, the yield of chalcopyrite is rather low in terms of atoms per molecule. It is only 25%, compared to other copper minerals such as chalcocite, Cu2S - 67%; cuprite, Cu2O - 67%; covellite, CuS [..]
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chip sample
A method of sampling a rock exposure whereby a regular series of small chips of rock is broken off along a line across the face.
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copper sulphide
Copper sulphide, often referred to as "hypogene", is the copper mineralization generally found at the bottom of a deposit.
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crushing and grinding
Mined ores have to be crushed and milled into a fine powder to liberate the economic mineral particles in a number of stages. The primary crushers are used for the initial phase after the ore is conveyed to stockpiles. Conventional milling circuits takes the coarse ore through secondary, and possibly tertiary, crushing which produces pebble-sized f [..]
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diamond drill
A drill using small diamond chips embedded on the head of the drill bit to cut the rock and the drill turns.
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drill core
The cylindrical piece of rock, usualy between one and three inches in diameter brought to surface by diamond drilling.
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environmental impact study
A written report, compiled prior to a production decision, that examines the effects proposed mining activities will have on the natural surroundings.
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flotation cells
Flotation cells are commonly used in conventional copper concentrators to separate the copper minerals from the waste rock. After being crushed and ground, the copper ore is pumped into flotation cells. Chemical reagents are added and the mixture is aerated and mechanically agitated. The mineral particles are separated from the host rock and float [..]
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