alluvial mining

常見例句

雙語例句

• Placer mining: Oldest method of recovering gold from alluvial deposits.
  砂礦 古河床里的金砂礦床。
• Mechanized placer mining, with special devices for washing and separating waste from valuable minerals, is used in productive alluvial deposits.
  機(jī)械化砂礦開采用于含礦量豐富的砂礦床．利用專門設(shè)備來淘洗、分離廢物與有用礦物。
• Gravel cemented geological body, called solid formation, has been found in the fluvial sediment of Quaternary system in the exploration and mining of alluvial gold deposit in recent years.
  近年來在砂金礦床的勘探和開采中，發(fā)現(xiàn)在第四系河流沖積物中存在砂礫石膠結(jié)地質(zhì)體，被稱為膠結(jié)層。

原聲例句

• He is one of many who have flocked to the Kangari hills in southern Sierra Leone to find small fortunes in the hard graft of alluvial gold mining.

權(quán)威例句

• De Beers is active in every category of industrial diamond mining: open-pit, underground, large-scale alluvial, coastal and deep sea.
  FORBES: Anglo American Receives Final Regulatory Approval for De Beers Acquisition
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