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Beck Mine [1] (Beck deposits; Kingston Iron deposit; Iron Gossam; Beck Mine; Gossan No. 1; 2 & 5 claims), Kingston Peak, Kingston Range District, Kingston Range, San Bernardino Co., California, USA

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Latitude & Longitude (WGS84): 35° 47' 5'' North , 115° 56' 6'' West
Latitude & Longitude (decimal): 35.7847222222, -115.935

A Fe occurrence/mine located in secs. 7 & 8, T21N, R10E, and in sec. 31, T20N, R10E, SBM, 6.6 km (4.1 miles) NNW of Kingston Peak (coordinates of record), at/near Beck Spring, along Excelsior Mine Road (about 20 miles ESE of Tecopa), on land of mixed ownership, including private (patented) (located claim). Owned by The Standard Slag Company (100%), Ohio (1981). Owned and operated by Standard Industrial Minerals, Inc. (100%), Ohio (1990). First produced in 1971. MRDS database stated accuracy for this location is 10 meters. The property contains Gossan No. 1, 2 & 5. They have exposed lengths of 430, 1,130 and 1,070 feet, respectively, from SE to NW. Their widths are from 50 to 100 feet.

Mineralization is a replacement deposit hosted in limestone. The ore body is lenticular, strikes N50W and dips 70E at a thickness of 152 meters, depth-to-top of 76 meters, depth-to-bottom of 182.88 meters, width of 30.48 meters and a length of 344.42 meters. The primary mode of origin was contact metasomatism and the secondary mode was metamorphic. Primary ore control was lithology and the secondary was fracturing. The limestone and diabase sill lie in the middle or upper part of the Crystal Spring Formation. A drilling project by the Pacific Coke and Coal Company in 1924 showed a major, low-angle thrust fault beneath the Beck Spring area, that truncates steeply dipping Crystal Spring units. This fault limits the downward extent of the iron gossan No. 5. The degree of wallrock alteration is moderate (sericitic, carbonatization). Associated rocks include diabase. Local rocks include Precambrian rocks, undivided, unit 1 (Death Valley).

Workings include surface and underground openings with a length of 111.25 meters and an overall depth of 19.81 meters. A 300 foot drift was driven on the Gossan No. 5 and a 65 foot shaft. An open pit mine was proposed (status =?). The road to Cima was improved for 77 km for the mine development. Water is obtained from a well 19 km from the mine. An existing power line was extended 16 km to the site.

Production statistics: Year: 1971 (Fe concentrates at 40% Fe): 204,508 tonnes per year.

Year: 1972 (Fe same): 719,829 tonnes per year.

Year: 1973 (Fe same): 625,444 tonnes per year.
Year: 1973 (direct shipping ore at 56.9% Fe): 30,864 tonnes per year.

Year: 1974 (Fe concentrates at 56.9% Fe): 380,646 tonnes per year.

Year: 1974 (direct shipping ore at 57.0% Fe): 25,561 tonnes per year

Year: 1975 (Mining operation terminated in 1974).

Year: 1976 (Fe concentrates at 40% Fe): 48,332 tonnes per year.
Year: 1976 (direct shipping ore at 50% Fe): 5,385 tonnes per year.

Year: 1977 (Fe concentrates at 56.9% Fe): 1,585 tonnes per year.

Year: 1978 (Fe concentrates at 57% Fe): 10,567 tonnes per year.

Reserves and resources: Type: in-situ (estimate year = 1944): Inferred reserves: 1,415,000 metric tons of ore; demonstrated reserves: 5,102,000 metric tons; indicated: 5,102,000 metric tons of ore. Total resources are 6,517,000 metric tons of ore. Commodity is Fe at 56.4 weight percent Fe (1944). Production has been 2,054,000 tons. The original reserve estimates were 5,021,000 tons of demonstrated and 6,414,000 tons of identified (11,435,000 tons).

Mineral List

11 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Mesozoic - Paleoproterozoic
66 - 2500 Ma
Precambrian rocks, undivided, unit 1 (Death Valley)

Age: to Cretaceous (66 - 2500 Ma)

Stratigraphic Name: Beck Spring Dolomite; Crystal Spring Formation; Deep Spring Formation; Johnnie Formation; Kingston Peak Formation; Marvel Dolomitic Limestone; Middle Park Formation; Mountain Girl Quartzite; Noonday Dolomite; Pahrump Group; Panamint Metamorphic Complex; Reed Dolomite; Sourdough Limestone; Stirling Quartzite; Wildrose Formation; World Beater Porphyry; Wyman Formation

Description: Conglomerate, shale, sandstone, limestone, dolomite, marble, gneiss, hornfels, and quartzite; may be Paleozoic in part

Comments: Death Valley region. Primarily sandstone, shale, dolomite, limestone, and conglomerate of Middle and Late Proterozoic age, but also includes some older Precambrian crystalline rocks. As mapped, includes some rocks of probable Mesozoic age

Lithology: Major:{conglomerate,mudstone,sandstone}, Minor:{dolostone,gneiss,marble,limestone,hornfels, quartzite}, Incidental:{siltstone, metavolcanic, amphibolite, chert, granitic}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page 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.


Butner, D. W. (1944) Kingston Iron Deposit, U.S. Bureau of Mines War Minerals Report, 10 pp.

Hewett, Donnel Foster (1948), Iron deposits of the Kingston Range, San Bernardino County, California: California Division Mines Bulletin 129: Part M: 194-206.

Hewett, Donnel Foster (1956), Geology and mineral resources of the Ivanpah quadrangle, California and Nevada, USGS Professional Paper 275, 172 pp.: 144.

Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology (Report 49): 49(1-2): 90-91, tabulated list No. 232, p. 72.

Skillings Mining Review (1971). Standard Slag Co. Develops New Iron Ore Mine in California. Skillings Mining Review, November 1971: 14.

Skillings Mining Review (1971). Standard Slag Ships First Ore from Beck Property. Skillings Mining Review, January 8, 1972: 22.

Skillings, Jr., David N. (1973), The Standard Slag Co. Skillings Mining Review, January 20, 1973: 11-15.

Engineering and Mining Journal (1974), Beck Mine - A Small California Operation, Engineering and Mining Journal: 175(11): 154.

Anonymous (1977), International Directory of Mining and Mineral Processing Operations, published by Engineering and Mining Journal: 174.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 72, 162.

California Division of Mines and Geology Open-File Report 85-15 (1985): No. 14, Pl. 6B & 7.

U.S. Bureau of Mines Open-File Report MLA 36-86 (1986): 16-18.

Calzia, J. P.; Frisken, J. G.; Jachens, R. C.; McMahon, A. B.; Rumsey, C. M. (1987), Mineral Resources of the Kingston Range Wilderness Study Area, San Bernardino County, California. U.S. Geological Survey Bulletin 1709-D, 34 p., maps.

California Division of Mines and Geology (1990), Mines and mineral producers active in California (1988-89), California Department of Conservation, Division of Mines and Geology, Special Publication 103.

Straam Engineers, Inc.; Capital and Operating Cost Estimating System Handbook, U.S. Bureau of Mines Contract No. JO255026.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10036214, 10262700.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060710209.

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