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Bowman Mine (Boman), Grizzly Gulch, Pike District, Sierra Co., California, USA

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Latitude & Longitude (WGS84): 39° 26' 41'' North , 120° 56' 39'' West
Latitude & Longitude (decimal): 39.4447212219, -120.944168091
 
A former Au-Ag occurrence/mine located in the NE¼NE¼ sec. 10, T18N, R9E, MDM, 2.5 km (1.6 miles) ESE of Grizzly Gulch (townsite), about 2.5 km ENE of Pike, along the W ridge of Grouse Creek (6 miles WSW of Alleghany), on National Forest land. MRDS database stated accuracy for this location is 100 meters.

Mineralization is a vein deposit. The quartz vein strikes N30-40W in highly weathered metamorphic rocks. Local rocks include Paleozoic marine rocks, undivided, unit 6 (Northwestern Sierra Nevada).

Workings include surface openings comprised of a 1,200 foot trench.

Production data are found in: U. S. Bureau of Mines Minerals Yearbook for 1944 (1945), Volume 3.

Production statistics: Year: 1944: Ore (accurate): ^0.33 ounce (9 grams)/ton Au; 0.038 ounce (1 gram)/ton Ag.

For 180 tons of ore, 60 ounces Au and 7 ounces Ag were extracted in 1944. No other production record was found. Production in 1944 was small.

Mineral List



2 entries listed. 2 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

U. S. Bureau of Mines Minerals Yearbook for 1944 (1945), Volume 3.

McCulloch, W.C., Oesterling, W.A., Spurck, W.H., & Tischler, M.S. (1964), Minerals for Industry, Northern California, Southern Pacific Company: Vol. II: (reprint: California Division of Mines and Geology Special Publication 94, 1987): 34.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10086504 & 10141181.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060910016.

 
Mineral and/or Locality  
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