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Tiptop prospect, McGee Mountain, Mono Co., California, USA

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A former W mine located in the SW¼SE¼ sec. 19, T4S, R29E, MDM, 1.7 km (5,600 feet) N of McGee Mountain (coordinates of record) and 9.4 km (5.9 miles) WNW of Aspen Springs (town), on National Forest land. MRDS database stated accuracy for this location is .

Mineralization involves a partially masked elliptical outcrop of tactite 350 feet long and 200 feet wide surrounded by granite, contains a little scheelite in irregular, narrow zones that trend E and W. Most of the tactite is barren; however, at the E edge is a single streak of high-grade ore 6 feet wide, 15 feet long and exposed to a depth of 10 feet. It appears under the ultra-violet lamp to contain about 5% WO3 and may amount to 90 tons. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Mineral List

1 entry listed. 1 valid mineral.

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.


Lemmon, Dwight Moulton (1941c), Tungsten deposits in the Sierra Nevada near Bishop California: USGS Bulletin 931-E: 99-100, Pl. 14.

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): 339.

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: No. 50.

Rinehart, Charles Dean & Donald C. Ross (1964), Geology and mineral deposits of the Mount Morrison quadrangle, Sierra Nevada, California: USGS Professional Paper 385, 106 pp.: 94, Pl. 1.

Johnson, F.L. (1983) Mineral Investigation of the Laurel-McGee Roadless Area Review & Evaluation (Rare II) Area No. 5045, Mono County, California, U.S. Bureau of Mines, MLA Open-File Report 38-83, Table 1, No. 12: 11.

Johnson, F.L., et al (1985), Mineral Resources of the John Muir Wilderness, Fresno, Inyo, Madera, and Mono Counties, California: U. S. Bureau of Mines unpublished file report. No. 64 (on file at USBM WFOC, Spokane, WA): Pl. 1, map No. 19.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10092372 & 10008602.

Lemmon, D.M., Tungsten deposits in the US; Vol. I, unpublished data.

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