Link to USGS home page.
Open-File Report 2005–1338
  About USGS /  Science Topics /  Maps, Products & Publications /  Education / FAQ

Summary and Integration of Geophysical Investigations of the Tooele Army Depot (TEAD), Tooele, Utah

By Theodore H. Asch

thumbnail image of report's coverpage

This report is a summary of the integration of the different geophysical investigations that have been performed to determine the depth to bedrock at the Tooele Army Depot (TEAD) near Tooele, Utah. The geophysical investigations discussed include the seismic, time-domain electromagnetic, gravity, and audio-magnetotelluric surveys. The primary purpose of these investigations was to investigate the depth to bedrock and the location of faults. This report provides an integration of the geophysical data with the available borehole information. The geophysical results, processing, and interpretation have been revisited from a data-integration point of view. Several inconsistencies became apparent between the different interpretations and with the borehole data. The various data sets were reexamined and the results were integrated into one interpretation. Site survey “coverage” (how much of the site was surveyed) was determined to be the main issue. The complicated and rapidly varying geology prevents full continuity of the geophysical interpretation of faulted blocks between the different lines and stations. A case is made for “wide-area” airborne electromagnetic and magnetic surveys of the Depot. These likely would result in a more comprehensive interpretation of the subsurface geology and, hence, the ground-water flow models in the vicinity of the Tooele Army Depot area.

Version 1.0

Posted September 2005

Part or all of this report is presented in Portable Document Format. The latest version of Adobe Acrobat Reader or similar software is required to view it. If you wish to download the latest version of Acrobat Reader free of charge, click here.


For viewing and printing upon download.
(This version of the report is accessible as defined in Section 508 of the Rehabilitation Act of 1973, Amendments of 1998.)

*Downloading Suggestion: It is best to download a large PDF file to your hard drive rather than open it inside your browser.

A standard click may automatically open the PDF file inside the browser but doing so will result in a very slow load.   For guidance on how to do this, go to [http://cpg.cr.usgs.gov/toolbox/download_advice.html].

Downloading the PDF file may take several moments but will be worth the wait.

Once it is downloaded, open the PDF from your hard drive using Adobe Acrobat—it will open in a fraction of the time it would take to open the PDF over the Internet.

USA.gov logo