alluvial mining

British  

noun

1. a method of extracting minerals by dredging alluvial deposits

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Example Sentences

Residents of La Toma have long practiced both alluvial mining — panning in the Ovejas for gold washed down from the hills — and digging for ore in tunnels cut deep into dirt and rock.

From Los Angeles Times • Sep. 25, 2022

The contrast between the modern new plant, based in the town of Koidu, and traditional hand-dug alluvial mining could not be more stark.

From BBC • May 21, 2012

For alluvial mining it will throw a powerful jet at 100 lb. to 120 lb. pressure, or by means of a belt will drive an experimental quartz crusher or stamp mill.

From Scientific American Supplement, No. 1178, June 25, 1898 by Various

These may be classed as alluvial mining, vein-mining, and the treatment of auriferous ores.

From The Romance of Industry and Invention by Cochrane, Robert

Hydraulicing is the cheapest form of alluvial mining, but can only be profitably carried out where extensive drifts, which can be worked as quarry faces, and unlimited water exist in the same neighbourhood.

From Getting Gold: a practical treatise for prospectors, miners and students by Johnson, J. C. F. (Joseph Colin Frances)