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

radium

Mining; General mining

A radioactive metallic element; one of the alkaline-earth metals. Symbol, Ra. It occurs in pitchblende ore, in carnotite sands, and in all uranium minerals.

A radioactive, silvery-white, metallic element. Symbol, U. Occurs in numerous minerals such as pitchblende, uraninite, carnotite, autunite, uranophane, davidite, and tobernite. It is also found in ...

neutron-gamma log

Mining; General mining

A radioactivity log employing both gamma and neutron-log curves. The neutron log should respond best to porous fluid-filled rock and the gamma best to shale markers.

neutron logging

Mining; General mining

A radioactivity logging method used in boreholes in which a neutron source provides neutrons that enter rock formations and induce additional gamma radiation, which is measured by use of an ...

fished joint

Mining; General mining

A rail joint made by means of fishplates.

gondola

Mining; General mining

A railroad car with no top, flat bottom, fixed sides, and sometimes demountable ends that is used chiefly for hauling heavy bulk materials. Compare: high side