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Black Oak Mine, Zenia, Coastal Range, Trinity Co., California, USA

Latitude: 40°14'5"N
Longitude: 123°31'37"W

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A former Mn mine located 4.4 km (2.7 miles) NW of Zenia, in the headwaters area of Bluford Creek on National Forest land (located claim). Discovered 1941. Owned by A. C. Crossman and T. K. Tyree, California (1974). MRDS database stated accuracy for this location is 1,000 meters.

The ore body dips vertically at a width of 1.52 meters. The 3 to 5 feet wide ore body dips vertically and lies in a belt of thin-bedded red chert that extends to the NW for more than 700 feet. The ore body can be traced for more than 40 feet and consists of highly siliceous oxide, which appears to lessen in grade with increasing depth. Local rocks include Franciscan Complex, unit 1 (Coast Ranges).

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References

Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 196.

Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 307.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10033675 & 10141713.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061050015

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 23rd Jun 2012 19:58:09