Open-File Report 2013–1139
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and Interactive Data Language (IDL) logical operator algorithms were used to map hydrothermally altered rocks in the central and southern parts of the Basin and Range province of the United States. The hydrothermally altered rocks mapped in this study include (1) hydrothermal silica-rich rocks (hydrous quartz, chalcedony, opal, and amorphous silica), (2) propylitic rocks (calcite-dolomite and epidote-chlorite mapped as separate mineral groups), (3) argillic rocks (alunite-pyrophyllite-kaolinite), and (4) phyllic rocks (sericite-muscovite). A series of hydrothermal alteration maps, which identify the potential locations of hydrothermal silica-rich, propylitic, argillic, and phyllic rocks on Landsat Thematic Mapper (TM) band 7 orthorectified images, and ArcGIS1 shape files of hydrothermal alteration units are provided in this study.
First posted November 21, 2013
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Eastern Mineral and Environmental Resources Science Center
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Mars, J.C., 2013, Hydrothermal alteration maps of the central and southern Basin and Range province of the United States compiled from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data (ver. 1.1, April 8, 2014): U.S. Geological Survey Open-File Report 2013–1139, 5 p., 13 plates, scale 1:1,300,000, http://dx.doi.org/10.3133/ofr20131139. (Available only online.)
ISSN 2331-1258 (online)
Data and Processing Methods