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

button test

Mining; General mining

A test designed to determine relative fusibility of frit or powder. So called because the completed specimens resemble buttons.

dry ice test

Mining; General mining

A test for detecting glass imitations; if a crystalline substance such as a gem mineral is placed on a piece of dry ice (solid CO 2 ), a squeaking noise can be heard. This is not true of ...

phenocryst

Mining; General mining

A term for large crystals or mineral grains floating in the matrix or groundmass of a porphyry.

inset

Mining; General mining

A term for large crystals or mineral grains floating in the matrix or groundmass of a porphyry.

demonstrated resources

Mining; General mining

A term for the sum of measured resources plus indicated resources.

A term frequently used in connection with conveyors used in gathering service. The mother conveyor receives coal from other conveyors or gathering machines, such as shuttle cars, and delivers it to ...

bedding fissility

Mining; General mining

A term generally restricted to primary foliation parallel to the bedding of sedimentary rocks; i.e., it forms while the sediment is being deposited and compacted. It is the result of the parallelism ...