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Open-File Report 2013–1024–G

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Prepared in cooperation with the U.S. Army, Fort Irwin National Training Center

Airborne Electromagnetic Data and Processing within Leach Lake Basin, Fort Irwin, California

By Paul A. Bedrosian, Lyndsay B. Ball, and Benjamin R. Bloss

Thumbnail of and link to report PDF (16.2 MB)Abstract

From December 2010 to January 2011, the U.S. Geological Survey conducted airborne electromagnetic and magnetic surveys of Leach Lake Basin within the National Training Center, Fort Irwin, California. These data were collected to characterize the subsurface and provide information needed to understand and manage groundwater resources within Fort Irwin. A resistivity stratigraphy was developed using ground-based time-domain electromagnetic soundings together with laboratory resistivity measurements on hand samples and borehole geophysical logs from nearby basins. This report releases data associated with the airborne surveys, as well as resistivity cross-sections and depth slices derived from inversion of the airborne electromagnetic data. The resulting resistivity models confirm and add to the geologic framework, constrain the hydrostratigraphy and the depth to basement, and reveal the distribution of faults and folds within the basin.

First posted January 6, 2014

This publication is online only

Back to Geology and Geophysics Applied to Groundwater Hydrology at Fort Irwin, California

For additional information, contact:
Geology, Minerals, Energy, and Geophysics Science Center
U.S. Geological Survey
345 Middlefield Road, MS 901
Menlo Park, CA 94025-3591
http://geomaps.wr.usgs.gov/gmeg/

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Suggested citation:

Bedrosian, P.A., Ball, L.B., and Bloss, B.R., 2014, Airborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California, chap. G of Buesch, D.C., ed., Geology and geophysics applied to groundwater hydrology at Fort Irwin, California: U.S. Geological Survey Open File Report 2013–1024, 20 p., http://dx.doi.org/10.3133/ofr20131024G.

ISSN 2331-1258 (online)

Contents

Abstract

Introduction

Purpose and Scope

Geologic Background

Airborne Electromagnetic Survey

Inversion of Electromagnetic Data

Model Assessment and Interpretation

Geophysical Data Overview

Acknowledgments

References

Figures (6)

Tables (4)

Appendixes (2)


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