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Calculation of Simultaneous Chemical Equilibria in Aqueous-Mineral-Gas Systems and its Application to Modeling Hydrothermal Processes

By
Mark H. Reed
Mark H. Reed
Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403-1272
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Published:
January 01, 1998

Abstract

Geochemical processes in hydrothermal systems are complexly interconnected. Quantitative, whole-system modeling is one of the most effective ways to untangle the interdependent and counterposing chemical effects to determine what the actual natural processes may be. Examples of basic processes include precipitation of ore and gangue minerals in open space to form veins, metasomatic replacement of wall rock by alteration minerals, boiling of an ascending fluid, mixing of ascending and descending fluids, and condensation of boiled gases into cold ground water or into aerated fractures. The course of attendant chemical reactions depends on the combined effects of several of the processes, and the linkages among processes may be subtle. The quantitative details of species concentrations, as determined from chemical reactions, make the difference between whether a mineral precipitates or not.

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Contents

Reviews in Economic Geology

Techniques in Hydrothermal Ore Deposits Geology

Jeremy P. Richards
Jeremy P. Richards
Department of Earth and Atmospheric Sciences University of Alberta Edmonton, Alberta, Canada T6G 2E3
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Peter B. Larson
Peter B. Larson
Department of Geology Washington State University Pullman, Washington 99164
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Society of Economic Geologists
Volume
10
ISBN electronic:
9781629490175
Publication date:
January 01, 1998

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