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Adamson Mine (Panaminas Inc.; Adamson claims; Adamson Tungsten deposit; Wheeler Ridge Tungsten Mine; Blue Jay claim), Scheelite, Bishop District (Tungsten Hills District), Inyo Co., California, USA

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Latitude & Longitude (WGS84): 37° 21' 42'' North , 118° 42' 12'' West
Latitude & Longitude (decimal): 37.3616666667, -118.703333333

A W-Cu-Mo-Ag-Au mine located in secs. 29, 30 & 31, T6S, R30E, MDM, 3.0 km (1.9 miles) SW of Scheelite, along the North Branch Morgan Creek near its confluence with Pine Creek (1 mile SE of Mount Morgan), in the Sierra Nevada, near the Pine Creek Mine, on private (patented) land within a National Forest area. Discovered in 1939. First production was in 1942. Owned by Paniminas Inc. (100%), California (1981). Operated by Union Carbide Mining and Metals Division - Pine Creek (100%), California (1981). MRDS database stated accuracy for this location is 10 meters.

Mineralization is hosted in marble. There are 2 ore bodies, the Northwest Ore Body and the Ridge Ore Body. The NW ore body is a horseshoe-shaped tactite zone, while the ridge ore body is a tactite bed. Ore body No. 1 strikes N5W and dips 72E at a thickness of 30 meters, a width of 800 meters and length of 100 meters. It is disseminated and irregular. Ore body No. 2 is a replacemetn body and tabular in shape. The primary mode of origin was contact metamorphism. The primary ore control was the contact zone and the secondary control was lithology. There is slight wallrock alteration (carbonate silicification). The mine is on the Pine Creek pendant. Local rocks include Carboniferous marine rocks, unit 7 (Bishop).

Workings include surface and underground openings comprised of a 1,300 foot main adit and 1,600 feet of level workings plus some open cuts. The site has a mill installed (beneficiation - flotation method). The mining method employed was caving methods - sublevel caving.

Production data are found in: Norman, L.A. & Richard M. Stewart (1951).

Production statistics: Year: 1943 (period = 1942-1943): 41,000 tons of ore.
Year: 1957 (period = 1954-1957): 68,400 tons of ore.
Tungsten ore mined after 1959 was included with that from the Pine Creek Mine.

Mineral List

8 valid minerals.

The above list contains all mineral locality references listed on 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 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.


Tucker, W. Burling & Reid J. Sampson (1938), Mineral resources of Inyo County, California: California Journal of Mines and Geology; California Division of Mines (Report 34): 34(4): 462.

Lemmon, Dwight Moulton (1941c), Tungsten deposits in the Sierra Nevada near Bishop California: USGS Bulletin 931-E: 91-92.

Partridge, John F., Jr. (1941), Tungsten resources of California: California Journal of Mines and Geology, California Division of Mines (Report 37): 37(2): 292.

Jenkins, Olaf Pitt (1942), Tabulation of tungsten deposits of California to accompany Economic Minerals Map no. 4: California Division Mines (Report 38): 38(3&4): 317.

Bateman, Paul C. (1945), Pine Creek and Adamson tungsten mines, Inyo County, California: California Division Mines Report 42: 231-250.

Norman, L.A. & Richard M. Stewart (1951), Mines and mineral resources of Inyo County, California: California Journal of Mines and Geology (Report 47): 47(1): 18-223.

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.

Bateman, Paul C. (1965), Geology and tungsten mineralization of the Bishop district, California: USGS Professional Paper 470: 134.

Gray, R.F., Hoffman, V.F., Bagan, R.J., and McKinley, H.L. (1968) Bishop tungsten district. In Ore Deposits of the United States, 1933-1967. The Graton-Sales volume, New York. A.I.M.E.: 1553.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 188.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10008550 & 10285137.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060270699.

Lemmon, D.M., Tungsten deposits in the US; Vol. I, unpublished data: 224-227.

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