Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool

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Conference Paper: Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool

Abstract
In the Great Basin of the western United States, geothermal fluids are sometimes associated with surface crusts of borate evaporite minerals. These borates can therefore potentially serve as a geothermal exploration tool if they can be efficiently identified and mapped in the field. We demonstrate the effectiveness of using a field-portable ASD Fieldspec® spectroradiometer, and satellite-based Advanced Spaceborne Thermal and Emitted Reflectance Radiometer (ASTER) imagery for mapping borate minerals in the field. Using the ASTER imagery reflectance characteristics of tincalconite in the 0.4-2.5 μm wavelength region as a guide, remotely generated mineral abundance maps were made for Rhodes, Teels, and Columbus Marshes (playas), located in western Nevada,. Field observations confirmed the presence of borate evaporite crusts in each of these locations and chemical analyses of well, spring and groundwater samples suggest the possible presence of hidden subsurface geothermal reservoirs. Cation and quartz geothermometer analyses yield reservoir temperature estimates between 118º C and 162º C at all three areas where waters were sampled in close proximity to borax and tincalconite evaporite crusts.

Authors 
Chris Kratt, Mark F. Coolbaugh and Wendy M. Calvin






Conference 
GRC Annual Meeting; San Diego, CA; 2013/09/10


Published 
Geothermal Resources Council, 2006





DOI 
Not Provided
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Online 
Internet link for Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool

Citation

Chris Kratt,Mark F. Coolbaugh,Wendy M. Calvin. 2006. Remote Detection of Quaternary Borate Deposits with ASTER Satellite Imagery as a Geothermal Exploration Tool. In: Transactions. GRC Annual Meeting; 2013/09/10; San Diego, CA. Davis, CA: Geothermal Resources Council; p. 435–439