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

pressure detector

Mining; General mining

A pressure-sensitive detector that responds to sound transmitted through water. It is used in marine seismic surveying, or as a seismometer in a well.

primary basalt

Mining; General mining

A presumed original magma, from which all other rock types are obtained by various processes of fractional crystallization.

ex vessel

Mining; General mining

A price quoted ex vessel used in connection with a port name means all costs paid until free of the ship's tackle at the port designated.

A primary cell, with a constant electromotive force of about 1.1 V, having as its electrodes: (1) copper in a copper sulfate solution, and (2) zinc in dilute sulfuric acid or zinc sulfate--the two ...

gyratory breaker

Mining; General mining

A primary crusher consisting of a vertical spindle, the foot of which is mounted in an eccentric bearing within a conical shell. The top carries a conical crushing head revolving eccentrically in a ...

gyratory crusher

Mining; General mining

Benthic Division

Mining; General mining

A primary division of the sea that includes all of the ocean floor. The Benthic Division is subdivided into the Littoral System (the ocean floor lying in water depths ranging from the high watermark ...