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Black Crow No. 1 claim [?], Black Crow No. 1 and Black Crow No. 2 claims, Boulder Peak, Altoona District, Trinity Mts, Klamath Mts, Trinity Co., California, USA

Latitude: 41°9'15"N
Longitude: 122°29'2"W

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A former Cr occurrence/claims/mine located 2.7 km (8,800 feet) S of Boulder Peak, along Grader Gulch, a tributary of the Trinity River, E of Crow Creek, on National Forest land. Discovered 1935. Owned by Mr. George L. Costa, Castella, California. MRDS database stated accuracy for this location is 500 meters.

NOTE: There are a total of 3 MRDS files pertaining to the Black Crow claims 1 & 2. There are two sets of data presented among those files. It would appear that MRDS files #10043522 & 10117796 applies to this location, probably one of the two combined claims, but not specified as such. The other file probably pertains to the other of the two claims located in sec. 14. This location was discovered first and is therefore probably claim No. 1.

Mineralization is a Cr deposit. The ore body is lens-shaped. The deposit occurs in a large body of peridotite that covers approximately 300 square miles in NE Trinity County. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 1 (Trinity Ophiolite).

Production data: Costa stated that he had 30 tons of chromite mined but not shipped on the Black Crow No. 1 claim (1941).

Mineral List

Chromite

1 entry listed. 1 valid mineral.

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References

Averill, Charles V. (1941), Mineral resources of Trinity County: California Journal of Mines and Geology, California Division Mines (Report 37): 37(1): 17.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10043522 & 10117796.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061050092.

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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: 7th Jul 2012 11:49:34