Skip to Main Content
Book Chapter

A Field Trip Overview to Low-Angle Faults and Associated Mineralization

By
William A. Rehrig
William A. Rehrig
Applied Geologic Studies, Inc.
Search for other works by this author on:
Published:
January 01, 1996

Abstract

The Cordillera of western North America may succinctly be described as an accreted continental margin consisting of obducted and stacked oceanic and miogeoclinal plates (Late Precambrian to Mesozoic), which has been overprinted by extraordinary Tertiary extension, particularly in middle North American. Both compressional and extensional processes have utilized gently dipping (low-angle) structural features, which include thrust faults, detachment faults, and rotated or listric normal faults. The thrusts commonly are mylonitic, indicating ductile shear at some depth. The detachments are marked by mylonitic and later brecciated footwall fabrics, suggesting deep and shallow deformation.

Such low-angle zones of shear, while not unique to the southwestern United States, are especially well exposed there. On this field trip we will have the pleasure of viewing key outcrops over a broad region of southern Nevada and western Arizona. These exposures are particularly instructive not only as examples of unique tectonic processes, but also with regard to mineral deposits hosted by such low-angle faults.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

Society of Economic Geologists Guidebook Series

Tertiary Extension and Mineral Deposits, Southwestern U.S.

William A. Rehrig
William A. Rehrig
I. Low-Angle Tectonic Features of the Southwestern United States and Their Influence on Mineral Resources
Search for other works by this author on:
James J. Hardy
James J. Hardy
II. Dismemberment of Porphyry Copper Mineralization in the Rosemont-Helvetia District, Arizona
Search for other works by this author on:
Society of Economic Geologists
Volume
25
ISBN electronic:
9781934969786
Publication date:
January 01, 1996

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

This Feature Is Available To Subscribers Only

Sign In or Create an Account

This PDF is available to Subscribers Only

View Article Abstract & Purchase Options

For full access to this pdf, sign in to an existing account, or purchase an annual subscription.

Subscribe Now