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Ventura Mine (Silver Reef claim; Sunset claim), Cerro Gordo, Cerro Gordo District, Inyo Mts (Inyo Range), Inyo Co., California, USA

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A former Pb-Ag-Cu mine located in sec. 23, T16S, R38E, MDM, 1.9 km (1.2 miles) W of Cerro Gordo (7 miles E of Keeler). MRDS database stated accuracy for this location is 10 meters.

Mineralization is a vein deposit hosted in limestone. The ore body is lenticular in form at a thickness of 1.52 meters. Partially oxidized, irregular lenses occur in silicated limestone adjacent to a quartz-monzonite intrusive. There are 2 ore veins. One strikes N30W and dips 70-80W. The other strikes N20E and dips 80E. Associated rocks include monzonite. Local rocks include Carboniferous marine rocks, unit 3 (SE California Clastic Assemblage).

Workings include underground openings with a length of 82.3 meters and an overall depth of 36.58 meters, and comprised of a 120 foot vertical shaft and a 250 foot adit on the Silver Reef claim.

Production data are found in: GOODWIN, J. G., 1957 , P. 520 (SEE REF).

The Ventura and Sunset produced between 1911 and 1949. Ore averaging 28.3% Pb, 5.79% Zn and 12.58 ounces Ag/ton.

Mineral List

3 entries listed. 3 valid minerals.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Waring, Clarence A. (1915), Inyo County; 15th Report of the State Mineralogist, California Mining Bureau (Report 15): 15: 110-111. (Note: This reference was presented in the USGS MRDS database file as: "REPORT 5, 1915-16, P. 110-111.")

Tucker, W. Burling & Reid J. Sampson (1938), Mineral resources of Inyo County, California: California Journal of Mines and Geology; California Division of Mines (Report 34): 34(4): 458.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines (Report 53): 53(3&4): 520.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 50.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10076652 & 10138897.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270202.

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