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Pittsburgh and Mount Shasta Mine (Mount Shasta Mine), Shasta, Shasta District, Klamath Mts, Shasta Co., California, USA

Latitude: 40°35'3"N
Longitude: 122°31'38"W
A former lode Au mine located in sec. 34, T32N, R6W, MDM (coordinates accurate; section projected), 3.4 km (2.1 miles) WSW of Shasta, on National Park Service land (Whiskeytown-Shasta-Trinity National Recreation Area). Located 1897. The property consisted of 3 claims. Active until 1905 and 1911 to 1913. The MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is hosted in meta-rhyolite. The ore body strikes N40W and dips 40 to 50SW at a thickness of 1.52 meters. The deposit consists of 2 parallel veins 50 feet apart. The footwall is quartz diorite and the hanging wall is meta-rhyolite. White quartz carries gold and pyrite in a dike of sheared alaskite within the quartz diorite. The ore shoot is low grade. Associated rocks include diorite. Local rocks include Mesozoic granitic rocks, unit 4 (Klamath Mountains and Northern Sierra Nevada).

Workings include underground openings comprised of a 660 foot shaft with 7 levels and a short crosscut at its base plus several short adits. The ore shoot is 400 x 12 feet.

Production data are found in: Averill, C.V. (1933). Production record from smelter shipment; additional production from stamp mill returns not recorded.

Mineral List

Gold
Pyrite


2 entries listed. 2 valid minerals.

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References

Ferguson, Henry G. (1914a), Gold lodes of the Weaverville quadrangle, California: USGS Bulletin 540: 47-49.

Brown, G. Chester (1916b), Shasta, Siskiyou, Trinity Counties: California Mining Bureau. (Report 14): 14(4): 794.

Averill, Charles V. (1933), Gold deposits of the Redding-Weaverville quadrangles: California Journal of Mines and Geology, California Division Mines (Report 29): 29: 38.

Eric, J.C. (1948), Copper in California: California Division of Mines Bulletin 144: 336.

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.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10262565 & 10103033.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060890347.

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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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