Gravity Survey and Interpretation of Fort Irwin and Vicinity, Mojave Desert, California

Open-File Report 2013-1024-H
Prepared in cooperation with the U.S. Army, Fort Irwin National Training Center
By:  and 
Edited by: David C. Buesch

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Abstract

In support of a hydrogeologic study of the groundwater resources on Fort Irwin, we have combined new gravity data with preexisting measurements to produce an isostatic residual gravity map, which we then separated into two components reflecting (1) the density distribution in the pre-Cenozoic basement complex and (2) the distribution of low-density Cenozoic volcanic and sedimentary deposits that lie on top of the basement complex. The second component was inverted to estimate the three-dimensional distribution of Cenozoic deposits by using constraints from geology, drillholes, and time-domain electromagnetic soundings. In most of the base, the Cenozoic deposits are no more than 300 m thick, except in the basins with more than 500 m of fill beneath Coyote Lake, Red Pass Lake, west of Nelson Lake, west of Superior Lake, Bicycle Lake, and in the vicinity of Nelson Lake.

Suggested Citation

Jachens, R.C., and Langenheim, V.E., 2014, Gravity survey and interpretation of Fort Irwin and vicinity, Mojave Desert, California, chap. H 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, 11 p., https://doi.org/10.3133/ofr20131024H.

ISSN: 2331-1258 (online)

Publication type Report
Publication Subtype USGS Numbered Series
Title Gravity survey and interpretation of Fort Irwin and vicinity, Mojave Desert, California
Series title Open-File Report
Series number 2013-1024
Chapter H
DOI 10.3133/ofr20131024H
Year Published 2014
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geology, Minerals, Energy, and Geophysics Science Center
Description Report: iv, 11 p.
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Geology and geophysics applied to groundwater hydrology at Fort Irwin, California
Country United States
State California
County San Bernardino County
City Fort Irwin
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
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