alunitization

alunitization

[‚al·yə·nə·tə′zā·shən]
(geology)
Introduction of or replacement by alunite.
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The gangue minerals are quartz, rhodochrosite, fluorite, calcite, and dolomite, which are not accordant with the typical characteristics of alternation in epithermal deposits (e.g., adularization or alunitization [24, 76, 77]), which can further rule out the possibility that the Zhijiadi deposit is a kind of epithermal deposit.