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Open-File Report 2011–1174

Audiomagnetotelluric Data to Characterize the Revett-Type Copper-Silver Deposits at Rock Creek in the Cabinet Mountains Wilderness, Montana

By Jay A. Sampson and Brian D. Rodriguez

Thumbnail of and link to report PDF (1 MB) Abstract

The Revett-type deposits at Rock Creek are part of the concealed stratabound copper-silver deposits located in the Cabinet Mountains Wilderness of Montana. The U.S. Geological Survey is conducting a series of multidisciplinary studies as part of the Assessment Techniques for Concealed Mineral Resources project.

Geologic, geochemical, geophysical, and mineral resources data are being evaluated with existing and new mineral deposit models to predict the possibility and probability of undiscovered deposits in covered terranes. To help characterize the size, resistivity, and depth of the mineral deposit concealed beneath thick overburden, a regional southwest-northeast audiomagnetotelluric sounding profile was acquired. Further studies will attempt to determine if induced polarization parameters can be extracted from the magnetotelluric data to determine the size of the mineralized area. The purpose of this report is to release the audiomagnetotelluric sounding data collected along that southwest-northeast profile. No interpretation of the data is included.

First posted August 10, 2011

For additional information contact:
Center Director, USGS Crustal Geophysics and Geochemistry Science Center
Box 25046, Mail Stop 964
Denver, CO 80225

http://crustal.usgs.gov/

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Suggested citation:

Sampson, J.A., and Rodriguez, B.D., 2011, Audiomagnetotelluric data to characterize the Revett-type copper-silver deposits at Rock Creek in the Cabinet Mountains Wilderness, Montana: United States Geological Survey Open-File Report 2011–1174, 73 p.



Contents

Abstract

Introduction

Electrical Properties of Rock

Magnetotelluric Method

Audiomagnetotelluric Survey Across the Revett-Type Copper-Silver Deposits at Rock Creek

Audiomagnetotelluric Data Collected in the Rock Creek Survey

References Cited

Audiomagnetotelluric Data Diagrams


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