Chemical aspects of hydrothermal alteration with emphasis on hydrogen metasomatism

Economic Geology
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Abstract

The ratio of cation to hydrogen-ion concentration is used as a basis for coordinating many observed varieties of silicate rock alteration. Low ratios drive alteration from feldspar through sericite, montmorillonite, or paragonite, toward kaolinite or pyrophyllite. Principal controls of ratio are reactions with wall rock, pressure-temperature changes, mixing of solutions, and oxidation of H 2 S; their interactions govern the assemblage attained.

Publication type Article
Publication Subtype Journal Article
Title Chemical aspects of hydrothermal alteration with emphasis on hydrogen metasomatism
Series title Economic Geology
DOI 10.2113/gsecongeo.59.4.538
Volume 59
Issue 4
Year Published 1964
Language English
Publisher Society of Economic Geologists
Description 32 p.
First page 538
Last page 569
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