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Tungsten Blue Mine (Pappas property), West Bishop, Bishop District (Tungsten Hills District), Inyo Co., California, USA

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A former W mine located in the NW¼ (estimated) sec. 12, T7S, R31E, MDM, 7.0 km (4.4 miles) W of West Bishop, along Deep Canyon. Operated intermittently (?) during the period 1941-1944. MRDS database stated accuracy for this location is 10 meters.

Mineralization is hosted in gabbro. The ore body is irregular in form. Gabbro surrounds a tactite pendant, which is 80 by 120 feet and which has its deepest exposure about 110 feet below the outcrop. The depth to which the pendant extends is unknown. It is a small tactite body. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include surface and underground openings with an overall depth of 51.82 meters, and comprised of 2 open pits, a 300 foot haulage adit, and a grizzly level established 70 feet above the adit. More development is not warranted.

Production statistics: Year: 1944 (period = 1944): 27 weight percent WO3. Total ore treated was 38,400 tons which averaged 0.35% to 0.4% WO3. (Discrepancy in data noted).

Mineral List



2 entries listed. 2 valid minerals.

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References

Lemmon, Dwight Moulton and Tweto, O.L. (1962) Tungsten in the United States, exclusive of Alaska and Hawaii. USGS Mineral Investigative Resources Map MR-25.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 333 (map 10-1).

Lemmon, D.M., Tungsten deposits in the US; Vol. I, unpublished data: 259-261.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10008561 & 10163893.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270060.

Mineral and/or Locality  
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