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Open-File Report 2011–1304

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Prepared in cooperation with Fugro Airborne Surveys, Limited, and the U.S. Army Cold Regions Research and Engineering Laboratory

Airborne Electromagnetic and Magnetic Geophysical Survey Data of the Yukon Flats and Fort Wainwright Areas, Central Alaska, June 2010

By Lyndsay B. Ball, Bruce D. Smith, Burke J. Minsley, Jared D. Abraham, Clifford I. Voss, Beth N. Astley, Maria Deszcz-Pan, and James C. Cannia

Thumbnail of and link to report PDF (6 MB)Abstract

In June 2010, the U.S. Geological Survey conducted airborne electromagnetic and magnetic surveys of the Yukon Flats and Fort Wainwright study areas in central Alaska. These data were collected to estimate the three-dimensional distribution of permafrost at the time of the survey. These data were also collected to evaluate the effectiveness of these geophysical methods at mapping permafrost geometry and to better define the physical properties of the subsurface in discontinuous permafrost areas. This report releases digital data associated with these surveys. Inverted resistivity depth sections are also provided in this data release, and data processing and inversion methods are discussed.

First posted January 9, 2012

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

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Suggested citation:

Ball, L.B., Smith, B.D., Minsley, B.J., Abraham, J.D., Voss, C.I., Astley, B.N., Deszcz-Pan, Maria, and Cannia, J.C., 2011, Airborne electromagnetic and magnetic geophysical survey data of the Yukon Flats and Fort Wainwright areas, central Alaska, June 2010: U.S. Geological Survey Open-File Report 2011–1304, 21 p.


Contents

Abstract

Introduction

Purpose and Scope

Description of Study Areas

Airborne Electromagnetic and Magnetic Survey: Methods and Measurements

Inversion of Electromagnetic Data

Model Assessment Using the Depth of Investigation (DOI) Metric

Geophysical Data Overview

Acknowledgments

References Cited

Appendix 1: Fugro Airborne, Ltd., Geophysical Report

Appendix 2: Calibration Procedure Summary

Appendix 3: Calibration Procedure Summary


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