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Duncan Creek deposit, Lookout Peak, Klamath Mts, Shasta Co., California, USA

Latitude: 40°26'43"N
Longitude: 122°45'51"W
A Mn occurrence located in sec. 28, T30N, R8W, MDM, 7.0 km (4.3 miles) SSE of Lookout Peak (coordinates of record), along the East Fork Duncan Creek. Location approximate. Discovered 1918. Owned by the American Mining and Smelting, Inc. (1974). MRDS database accuracy for this location is not stated.

Local rocks include schist of various types and ages, unit 7 (Klamath Mountains) and/or Lower Cretaceous marine rocks.

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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: 182.

Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 266.

Trengrove, Russell R. (1960), Reconnaissance of California Manganese Deposits, U.S. Bureau of Mines Report of Investigation 5579: 13.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10033602 & 10116538.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060890002.

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New Mineral Name: 褐硫砷鉛礦From Peter Haas, 30th Sep 2014 11:10:28