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Scientific Investigations Map 2892

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## Geologic Map of the Vigo NE Quadrangle, Lincoln County, Nevada

#### By Robert B. Scott and Anne E. Harding

| *SIM 2892*PDF (6.3 MB)                    Right-Click to 'Save As' or 'Download'*SIM 2892*PDF (6.3 MB)                  Right-Click to 'Save As' or 'Download'**Abstract**
This map of the Vigo NE quadrangle, Lincoln County, Nevada records the distribution, stratigraphy, and structural relationships of Tertiary intracaldera lavas and tuffs in the southeastern part of the Kane Springs Wash caldera, extracaldera Tertiary and upper Paleozoic rocks, and late Cenozoic surficial deposits both within and outside the caldera. The alkaline to peralkaline Kane Springs Wash caldera is the youngest (14 Ma) of three chemically related metaluminous to peralkaline calderas (Boulder Canyon caldera, 15 Ma; Narrow Canyon caldera, 16 Ma) of the nested Kane Springs Wash caldera complex. The chemistry of this caldera complex became progressively more alkalic with time, in contrast to the older calc-alkalic calderas and caldera complexes to the north that migrated progressively southward in eastern Nevada. The increasingly peralkaline eruptions from the Kane Springs Wash caldera complex reached a climax that was simultaneous with the end of both rapid extension and magmatism in this part of the Basin and Range. Using the assumption that degree of tilting is related to the degree of extension, the rate of extension increased until the abrupt halt at about 14 Ma. Silicic volcanism terminated at the Kane Springs Wash caldera followed only by local sporadic basaltic eruptions that ended by about 8 Ma. The northern boundary of an east-west-trending amagmatic corridor appears in the Vigo NE quadrangle south of the Kane Springs Wash caldera.

This map is available from USGS: Maps on Demand. | Version 1.0

Posted September 2006
-  **Map** PDF (6.3 MB)  (This report meets accessibility standards defined by Section 508.) 
-  **Pamphlet** PDF (443 KB) 
-  **Downloads** Directory  Refer to the Metadata file for more information about the dataset in this directory. 
*Contains*ArcView shapefiles and other related geospatial database files.*Contains*ArcView shapefiles and other related geospatial database files. |
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| U.S. Department of the Interior | U.S. Geological Survey      URL: https://pubsdata.usgs.gov/pubs/sim/2006/2892/Questions or Assistance: USGS Web ContactPage Last Modified: Thr Dec  1 17:05 EDT 2016 |  |

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