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单词 Propylitic Alteration
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Propylitic Alteration

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Propylitic alteration

Propylitic alteration is the chemical alteration of a rock, caused by iron and magnesium bearing hydrothermal fluids, altering biotite or amphibole within the rock groundmass. It typically results in epidote–chlorite–albite alteration and veining or fracture filling with the mineral assemblage along with pyrite.

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