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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Show in your GIS using OGC web services:

https://mrdata.usgs.gov/services/alteration (WMS, version 1.3.0)

https://mrdata.usgs.gov/mapcache/wmts (WMTS, version 1.0.0)

View as tiled imagery in Google Earth

Download compressed KML for a specific type of alteration

Alteration type KML Download 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

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Get the entire data set:

ofr-2013-1139.zip (zipped shapefile 587 MB)

Download zipped shapefile for a specific type of alteration

Alteration type Shapefile Size
Argillic argillic.zip 86
Phyllic phyllic.zip 123
Epidote-chlorite epi_chlor.zip 161
Carbonate carbonate.zip 68
Hydro-silica hydro_silica.zip 150

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