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Mexican Mine (Reed Flat), Index Hill, White Mts, Inyo Co., California, USA

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A former Pb-Zn-Ag mine located in sec. 31, T6S, R35E & in sec. 6, T7S, R35E, MDM, about 9.3 km SSW of Index Hill, on the SE margin of Reed Flat, on National Forest wilderness land (Birch Creek Roadless Area Review & Evaluation (RARE II) Area). Discovered in 1862. First (modern ?) production was in 1909. MRDS database stated accuracy for this location is 10 meters.

Mineralization is a replacement deposit hosted in limestone. The ore body is 18 meters thick, 134 meters wide & 134 meters long. The ore body(ies) are massive, disseminated replacement bodies. The primary mode of origin was hydrothermal. Primary ore control was faulting and the secondary was lithology. The degree of wallrock alteration is unknown. The ore is partially oxidizedm to carbonates of Pb & Zn. Galena & cerussite combined are 1.1% Pb. Sphalerite & smithsonite may also be present. Local rocks include Precambrian rocks, undivided, unit 1 (Death Valley).

Workings include surface and underground openings. There are several open cuts, a 60 foot shaft with an 800 feet crosscut adit driven S60E. There are also over 400 feet of drifts and crosscuts driven N from the adit. A 60 foot winze and a 25 foot raise are also present.

Production data are found in: Goodwin, Joseph Grant (1957).

Production totals unknown.

Assay data results: Year: 1948: 3.7% Pb, 6% Zn, & 2.6 ounces Ag/ton.

NOTE: The MRDS files present "production" data in the form of yield per ton. These data are confusing as presented. see the MRDS files.

Reserves and resources data: Estimate year: 1983: inferred: 245,000 metric tons ore; demonstrated: 49,000 metric tons ore, indicated: 49,000 metruic tons ore; total resources: 294,000 metric tons ore.

Resource details: Ag: 58 grams/metric ton; Pb: 1.1 weight %; Zn: 1.8999 weight %.

Mineral List



6 entries listed. 6 valid minerals.

The above list contains all mineral locality references listed on mindat.org. 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 mindat.org 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.

References

Tucker, W. Burling (1926), Imperial, Inyo Counties: California Journal of Mines and Geology, California Mining Bureau. (Report 22): 22(4): 497.

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): 452, 478.

Butner, D. W. (1945), Mexican Lead Mine, Inyo County, California, Access Road Report (unopublished), U.S. Bureau of Mines: 6 (report on file at the U.S. Bureau ofMines Western Field Operations Center, Spokane, Washington).

Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology (Report 47): 47(1): 74-75.

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines (Report 53): 53(3&4): 489.

Rains, R. L., and Iverson, S.R. (1983), Mineral Resources of the Birch Creek RARE II Area (No. 5060), Inyo County, California, U.S. Bureau of Mines Open-File Report 90-83, No. 10: p. 14.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10076658 & 10212141.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270212.

 
Mineral and/or Locality  
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