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Mohawk Mine (Clark Station Mine; Pactolus Mine; Wilshire prospect), Mohawk Hill, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA

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Latitude & Longitude (WGS84): 35° 28' 43'' North , 115° 37' 4'' West
Latitude & Longitude (decimal): 35.47860,-115.61774
Köppen climate type:BWh : Hot deserts climate

A former Pb-Cu-Au-Ag-Zn-Mn occurrence/mine complex located in secs. 7, 8, 17 & 18, T16N, R13E, SBM, on and around Mohawk Hill, just N of Interstate highway 15 (24 miles N of Cima). MRDS database stated accuracy for this location is 100 meters.

NOTE: This mine has been placed off limits and posted against trespass in both English and Spanish. Both roads leading to the mine adits are chained and padlocked with carbide-shackled locks (as of February 3, 2010).

Mineralization is hosted in limestone. The ore body is irregular in form, strikes N40W and dips vertical at a thickness of 9.14 meters. Controls for ore emplacement included fractures crossing the contact zones. A series of parallel fissures lie near an irregular contact between limestone and quartz monzonite. The strike is generally eastward, and the dip is about 40 degree southward. The ore is soft, earthy and associated with soft Fe and Mn oxides. Associated rocks include quartz monzonite. Local rocks include Devonian marine rocks, unit 1 (Death Valley) and/or Quaternary alluvium and marine deposits.

Workings include underground openings comprised of 3 tunnels (adits) at different levels driven northward into Mohawk Hill. The workings include winzes, raises, adits, drifts and stopes, totaling over 2,500 feet.

Production statistics: Year: 1951: ore (estimate): ^12% Pb, 4.92 ounces Ag, 0.50% Cu, and minor Au. Recovery percentage: 1 weight percent Pb (139 grams/metric ton).

Recorded production 1918 to 1952, intermittent. Ratio of Pb:Zn, about 2:1. During early years of production operators reported the average grade to be 10% Pb, 3% Zn and 7-8 ounces Ag/ton.

Mineral List

Mineral list contains entries from the region specified including sub-localities

59 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

Holocene - Pliocene
0 - 5.333 Ma

ID: 2885167
Quaternary alluvium and marine deposits

Age: Cenozoic (0 - 5.333 Ma)

Stratigraphic Name: Temescal Formation; Modesto Formation; Victor Formation; Alameda Formation; Aromas Red Sands; Bautista Beds; Brawley Formation; Borrego Formation; Burnt Canyon Breccia; Cabezon Fanglomerate; Campus Formation; Casitas Formation; Chemehuevi Formation; Corcoran Clay; Cushenbury Springs Formation; Dos Picachos Gravels; Dripping Springs Formation; Frazier Mountain Formation; Friant Formation; Harold Formation; Heights Fanglomerate; Hookton Formation (part); Huichica Formation; La Habra Formation; Manix Lake Beds; Mohawk Lake Beds; Montezuma Formation; Nadeau Gravel; Ocotillo Conglomerate; Orcutt Formation; Pacoima Formation; Pauba Formation; Peckham Formation; Pinto Formation; Resting Springs Formation; Riverbank Formation; Rohnerville Formation; San Dimas Formation; Shoemaker Gravel; Temecula Arkose; Battery Formation; Bay Point Formation; Colma Formation; Lindavista Formation; Lomita Marl; Merritt Sand; Millerton Formation; Palos Verdes Sand; San Pedro Formation; Sweitzer Formation; Timms Point Silt

Description: Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.

Lithology: Major:{coarse alluvium}, Minor:{fine alluvium}

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

Localities in this Region


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.


Tucker, W. Burling & Reid J. Sampson (1943b), Mineral resources of San Bernardino County: California Division Mines Report 39: 484, 485.

Wiebelt, F.J. (1949a), Investigation of the Mohawk lead-zinc mine, San Bernardino County, California: US Bureau Mines Report of Investigation 4478.

Wright, L.A., et al (1953), Mines and mineral resources of San Bernardino County, California: California Journal of Mines and Geology: 49: 49-192: 109-111.

Hewett, Donnel Foster (1956) Geology and mineral resources of the Ivanpah quadrangle, California and Nevada, USGS Professional Paper 275, 172 pp.: 145-146.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 59, 172.

Mineralogical Record (1977): 8: 432.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 85, 104, 168, 227, 229, 230, 233, 277, 302, 303, 321, 323.

California Division of Mines and Geology Open File Report 84-2 (1984): No. 19, Plates 5 & 6.

U.S. Bureau of Mines (1990), Mineral Investigation of the East Mojave National Scenic Area, San Bernardino County, California: Table 2: No. 95-96: p. 74; No. 107: p. 76.

Wise, William S. (1990), The Mineralogy of the Mohawk Mine San Bernardino County, California, San Bernardino County Museum Association, Quarterly Vol 37(1), February, 1990.

Mineralien-Welt (1993): 1/93: 44.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10034068 & 10213076.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060710264.

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