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American Mine (American vein; Old American Mine; French Gulch Mine), French Gulch, French Gulch District, Klamath Mts, Shasta Co., California, USA

Latitude: 40°43'9"N
Longitude: 122°36'25"W
A former Au-Pb-S-As mine located in sec. 7, T33N, R6W, and in secs. 12 & 13, T33N, R7W, MDM, 3.3 km (2.0 miles) NE of French Gulch, on a prominent ridge between China Gulch and Jic Gulch, both tributaries of Cline Gulch, which, in turn, is a tributary of Clear Creek. Property is comprised of 6 claims. Produced 1886-1914. MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is a Au-bearing vein deposit hosted in slate of the Bragdon Formation (siltstone, shale, slate, conglomerate). The ore body is tabular, strikes N80E, dips steeply S at 0.91 meters thick, with a depth-to-top of 0.0 meters and a depth-to-bottom of 243.84 meters. Both slate and conglomerate were encountered in the upper workings. Only slate was encountered in the lower part. The slate is crushed near the vein into small, angular fragments, which are silicified. The slate is in fault contact with greenstone. Local rocks include Paleozoic metavolcanic rocks, unit 1 (Eastern Klamath Mountains) and/or carboniferous marine rocks, unit 4 (Eastern Klamath Mountains).

Workings include underground openings with an overall depth of 243.84 meters.
They are comprised of a series of 5 adits, 50 to 1400 feet long, with drifts, winzes, stopes, etc.. There are several levels. The ore shoot is 125 x 2 feet.

Production data are found in: Lydon, P.A. and O'Brien, J.C. (1974).

Production was recorded prior to 1914.

Mineral List

Galena
Gold
Pyrite


3 entries listed. 3 valid minerals.

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References

Averill, Charles V. (1939), Mineral resources of Shasta County: California Journal of Mines and Geology, California Division of Mines (Report 35): 35(2): 130-131.

Albers, John P. & Jacques F. Robertson (1961), Geology and ore deposits of East Shasta copper-zinc district, Shasta County, California, USGS PP 338:

Albers, J.P. & C.H. Sandberg (1965), Economic geology of the French Gulch quadrangle: California Division Mines & Geology Special Report 85: 43p.

Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193, 186 pp.

Lydon, Philip Andrew and O’Brien, J.C. (1974) Mines and mineral resources of Shasta County, California. California Division of Mines and Geology County Report 6, 154 pp.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 32.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10034364, 10214100.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060890410.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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.
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