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Introduction to Chemical Calculations

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Published:
January 01, 1984

Abstract

This text is designed to introduce you to the practical concepts and calculations involved in interpreting the chemistry of high-temperature fluids in geothermal systems and hydrothermal ore-forming environments. It is intended that the energetic reader will learn to understand chemical principles, handle routine calculations and follow specialized chemical studies involved in geothermal exploration and exploitation and in ore genesis.

Although the emphasis of the text is on the interpretation of the chemistry of active geothermal systems, the principles involved are equally relevant to the interpretation of fossil hydrothermal ore-forming environments. Many gold-silver ore deposits, for example, have been shown to have formed in the near-surface region of hydrothermal systems similar in fluid chemistry and setting to those active today (White, 1981; Henley and Ellis, 1983). Combination of a knowledge of the principle processes within the active geothermal systems, the thermodynamics of complex ion formation, mineral-fluid equilibria and stable isotope systematics provide a framework which may assist in reconstruction of the hydrological regime within a fossil hydrothermal system where ore deposition occurred. This in turn may become useful in ore search. A chapter dealing with the hydrothermal chemistry of magmatic systems is included later in order to encompass a wider range of ore depositing environments and perhaps the root zones of the active geothermal systems.After a short introduction to the types of geothermal fluids and chemical calculations, successive chapters will address the interpretation of water and gas analyses from geothermal wells. When we understand the reservoi r compositions of some

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Contents

Society of Economic Geologists Guidebook Series

Fluid-Mineral Equilibria in Hydrothermal Systems

R. W. Henley
R. W. Henley
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A. H. Truesdell
A. H. Truesdell
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P. B. Barton, Jr.
P. B. Barton, Jr.
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J. A. Whitney
J. A. Whitney
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Society of Economic Geologists
Volume
1
ISBN electronic:
9781629490083
Publication date:
January 01, 1984

GeoRef

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