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Economic Geology GSW 2008 Users' Group Meeting
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Economic Geology; October 1968; v. 63; no. 6; p. 622-635
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Hydrothermal transport and deposition of gold

Harold C. Helgeson, and Robert M. Garrels

Geologic characteristics of gold-pyrite-quartz veins, particularly typical gold:quartz ratios, suggest that the veins can be formed from acid solutions containing 0.001-0.05 ppm Au. Thermodynamic calculations indicate that sufficient gold can be carried as chloride complexes in concentrated chloride solutions to account for deposits precipitated above 175 degrees C. Gold, pyrite, and quartz precipitate with falling temperature, gild and pyrite with increase in pH and(or) decrease in oxidation state. Data from fluid inclusions; paragenesis and ratios of gold, pyrite, and quartz; and possibly aluminum content of quartz are potential ore guides.

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JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
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