Skip to Main Content
Book Chapter

Hydrothermal Mineralization in the Guaymas Basin, Gulf of California

By
Jan M. Peter
Jan M. Peter
Marine Geology Research Laboratory Department of Geology University of Toronto Toronto, Ontario, Canada
Search for other works by this author on:
Steven D. Scott
Steven D. Scott
Marine Geology Research Laboratory Department of Geology University of Toronto Toronto, Ontario, Canada
Search for other works by this author on:
Published:
January 01, 1991

Abstract

Hydrothermal precipitates occur in both the northern and southern troughs of the Guaymas Basin in the Gulf of California. A talc-pyrrhotite deposit in the northern trough is interpreted to have formed at temperatures around 280°C. Numerous hydrothermal spires and mounds composed of carbonates, sulfates, silicates, metal (Fe, Zn, Cu-Fe, Pb) sulfides, and iron oxides are found at a water depth of 2000 m in the southern trough. Some structures are actively venting hydrothermal fluid at temperatures of more than 300°C. Predominant minerals include calcite, barite, amorphous silica, stevensite, pyrrhotite, and marcasite. Mineral assemblages present and the compositions of the individual minerals can best be explained by the mixing of end-member hydrothermal fluid with ambient seawater. Most minerals are precipitated at the vent site largely in response to decreasing temperature induced by mixing.

You do not currently have access to this article.

Figures & Tables

Contents

AAPG Memoir

The Gulf and Peninsular Province of the Californias

J. Paul Dauphin
J. Paul Dauphin
Search for other works by this author on:
Bernd R. T. Simoneit
Bernd R. T. Simoneit
Search for other works by this author on:
American Association of Petroleum Geologists
Volume
47
ISBN electronic:
9781629811130
Publication date:
January 01, 1991

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal