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Dewey Mine, Coffee Creek, Coffee District (Coffee Creek District), Klamath Mts, Trinity Co., California, USA

Latitude: 41°4'25"N
Longitude: 122°45'43"W

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A former Au-Cu-Fe mine located in sec. 10, T37N, R8W, MDM (UTM estimated S½S½ sec. 10, location estimated from description in reference. Uncertain.), 5.4 km (3.3 miles) W of Coffee Creek (town), along Little Boulder Creek, a tributary of Coffee Creek (2 miles S of the Coffee Creek Ranch), on National Forest land. MRDS database stated accuracy for this location is 500 meters.

Mineralization is hosted in granodiorite and lamprophyre. The ore body strikes N30E and dips 85SE at a thickness of 1.22 meters. Local rocks include Mesozoic granitic rocks, unit 5 (Klamath Mountains).

Workings include underground openings comprised of 150 feet of drifts from a crosscut adit.

No special production record found. Soon after discovery, a considerable quantity of oxidized croppings were worked, yielding $700 (period values).

Mineral List

Calcite
Chalcopyrite

Gold
Pyrite

Quartz
Siderite

6 entries listed. 6 valid minerals.

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References

MacDonald, Donald Francis (1913), Notes on the gold lodes of the Carrville district, Trinity County, California: USGS Bulletin 530-D: 33.

Averill, Charles V. (1931), Preliminary report on economic geology of the Shasta quadrangle: California Journal of Mines and Geology, California Division Mines (Report 27): 27: 32.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10035868 & 10281219.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061050504.

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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: 8th Jul 2012 14:21:43