出典:Wiktionary
gangue (countable かつ uncountable, 複数形 gangues)
出典:Wikipedia
出典:『Wikipedia』 (2011/05/15 09:25 UTC 版)
In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. The separation of mineral from gangue is known as mineral processing, mineral dressing or ore dressing and it is a necessary and often significant aspect of mining. It can be a complicated process, depending on the nature of the minerals involved.