Mineral Resources On-Line Spatial Data

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Maps of hydrothermal alteration in the Basin and Range province of the US

Maps and data showing the geographic distribution of surficial minerals likely produced by hydrothermal alteration, which may indicate areas permissive of gold and copper mineral deposits.

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reduced-size image of the interactive map
Argillic alteration
Propylitic alteration (calcite, dolomite)
Propylitic alteration (epidote, chlorite)
Phyllic alteration
Hydrothermal silica-rich rocks
United States Legend
Show in Google Earth or download KML:
View as tiled imagery in Google Earth: alteration.kml
Alteration type Download file
KMZ file size
Argillic argillic.kmz 55
Phyllic phyllic.kmz 80
Epidote-chlorite epi_chlor.kmz 103
Carbonate carbonate.kmz 45
Hydro-silica hydro_silica.kmz 101
Show in your GIS using OGC WMS:
Show in your GIS using OGC WMTS:
Get the entire data set
ofr-2013-1139.zip (587 Mb zipped shapefile expands to 1.1 Gb)
Get data for a specific type of alteration
Alteration type Download file
Zip file size
Expands to
Argillic argillic.zip 86 182
Phyllic phyllic.zip 123 247
Epidote-chlorite epi_chlor.zip 161 339
Carbonate carbonate.zip 68 129
Hydro-silica hydro_silica.zip 150 274
[Outline] - [Questions & Answers] - [Plain text]
USGS Open-File Report 2013-1139
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

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Page Last Modified: Wednesday, 15-Feb-2017 10:42:00 MST