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

Deposit type

Mining; General mining

A class representing all the recognised mineral deposits that are defined by physical and genetic factors that can be consistently differentiated from those of other classes or deposit types.

Atmosphere-supplying respirator

Mining; General mining

A class of respirators that supply a respirable atmosphere, independent of the workplace atmosphere.

Hyperon

Mining; General mining

A class of short-lived elementary nuclear particles with masses greater than that of the neutron.

A closed conduit that is gradually contracted to a throat causing a reduction of pressure head by which the velocity through the throat may be determined. The contraction is generally followed, but ...

Depression contour

Mining; General mining

A closed contour, inside of which the ground or geologic structure is at a lower elevation than that outside, and distinguished on a map from other contour lines by hachures marked on the downslope ...

Owen's borehole surveying instrument

Mining; General mining

A clockwork photographic apparatus that records clinometer and compass readings on sensitised paper. It is used during borehole surveying.

Scalenohedron

Mining; General mining

A closed crystal form, each face of which is a scalene triangle; trigonal scalenohedra have 12 such faces; tetragonal have 8. Adjective: scalenohedral. See: dogtooth spar.