Mineral mining

Mineral mining

The extraction of valuable minerals or other geological materials from the earth for economic interests.

Industry: Mining

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Mineral mining

fancy

Mining; General mining

A term applied to semiprecious stones prized for qualities other than intrinsic value.

miarolitic

Mining; General mining

A term applied to small irregular cavities in igneous rocks, esp. granites, into which small crystals of the rock-forming minerals protrude; characteristic of, pertaining to, or occurring in such ...

red-hard

Mining; General mining

A term applied to some varieties of tool steels that will retain their hardness even when operating at a red heat.

metallurgical smoke

Mining; General mining

A term applied to the gases and vapors, and fine dust entrained by them, that issue from the throats of furnaces; consists of three distinct substances: gases (including air), flue dust, and the ...

A term applied to the rims or borders consisting of microcrystalline aggregates of pyroxene or amphibole occurring around olivine, where it would otherwise be in contact with plagioclase, or around ...

mass detonation

Mining; General mining

A term applied to the unintentional detonation of all or a part of a large quantity of explosive material (bulk truckload, shipload, or caseload) by the explosion of a smaller quantity of explosives ...

plateau basalt

Mining; General mining

A term applied to those basaltic lavas that occur as vast composite accumulations of horizontal or subhorizontal flows, which, erupted in rapid succession over great areas, have at times flooded ...