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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.

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References

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.

 
Mineral and/or Locality  
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