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

tangiwaite

Mining; General mining

A term used by the Maoris of New Zealand for bowenite, a massive variety of antigorite. Also spelled tangiwai or tangawaite.

zonal structure

Mining; General mining

A term used esp. in miscroscopic work to describe those minerals whose cross sections show their successive concentric layers of growth.

aminoffite

Mining; General mining

A tetragonal mineral, Ca 2 (Be,Al)Si 2 O 7 (OH).H 2 O ; in colorless crystals in Sweden.

gehlenite

Mining; General mining

A tetragonal mineral, Ca 2 Al(AlSi)O 7 ; melilite group; forms a series with akermanite; a common constituent of feldspathoidal rocks formed by reaction of mafic magmas with carbonate rocks.

velardenite

Mining; General mining

A tetragonal mineral, Ca 2 Al(AlSi)O 7 ; melilite group; forms a series with akermanite; a common constituent of feldspathoidal rocks formed by reaction of mafic magmas with carbonate rocks.