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Scientific Investigations Map 2976

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## Alteration Map Showing Major Faults and Veins and Associated Water-Quality Signatures of the Animas River Watershed Headwaters Near Silverton, Southwest Colorado

#### By Dana J. Bove, Douglas B. Yager, M. Alisa Mast, and J. Brad Dalton

| *SIM 2976*Map PDF (8.7 MB)                Right-Click to 'Download' or 'Save As'*SIM 2976*Map PDF (8.7 MB)              Right-Click to 'Download' or 'Save As'
This map was produced to provide hard-copy and digital data for alteration assemblages in the historical mining area centered on the Tertiary San Juan and Silverton calderas. The data have direct application to geoenvironmental and mineral exploration objectives. 

This dataset represents alteration mapping for the upper Animas River watershed near Silverton, Colorado. The map is based on detailed 1:12,000-scale field mapping, X-ray diffraction (XRD) analysis, mineral mapping by remote sensing (AVIRIS) data, and 1:24,000-scale aerial photographic interpretation. Geologic structures were compiled and generalized from multiple published and unpublished sources (Burbank and Luedke, 1964; Steven and others, 1974; Luedke and Burbank 1975a, b; Lipman, 1976; Luedke and Burbank, 1987; Luedke, 1996) (see Index Map). Unpublished mapping of the Ironton quadrangle by D.J. Bove and J.P. Kurtz in 1997-1999 was included. | Version 1.0

Posted October 2007
-  **Map** PDF (8.7 MB) 
-  **Pamphlet** PDF (31 MB) 
-  **Downloads** Directory 
Refer to the Metadata file for more information about this dataset. |
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**Suggested citation:**

Bove, D.J., Yager, D.B., Mast, M.A., and Dalton, J.B., 2007, Alteration map showing major faults and veins and associated water-quality signatures of the Animas River watershed headwaters near Silverton, southwest Colorado: U.S. Geological Survey Scientific Investigations Map 2976, 18-p. pamphlet, 1 plate, scale 1:24,000.

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U.S. Department of the Interior | U.S. Geological Survey	URL: *http://pubsdata.usgs.gov/pubs/sim/2976/index.html*	Questions or Assistance: Contact USGS	Last modified: Thursday, 01-Dec-2016 17:09:57 EST