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.
Show in a web browser window:
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 MB |
| Phyllic | phyllic.kmz | 80 MB |
| Epidote-chlorite | epi_chlor.kmz | 103 MB |
| Carbonate | carbonate.kmz | 45 MB |
| Hydro-silica | hydro_silica.kmz | 101 MB |
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 | ofr-2013-1139-argillic.zip | 86 |
| Phyllic | ofr-2013-1139-phyllic.zip | 123 |
| Epidote-chlorite | ofr-2013-1139-epi_chlor.zip | 161 |
| Carbonate | ofr-2013-1139-carbonate.zip | 68 |
| Hydro-silica | ofr-2013-1139-hydro_silica.zip | 150 |
Metadata:
