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Sweetwater Mine (Milliken Mine; Frank R. Milliken; Blair Creek; Ozark Lead Company Mine; Adair Creek; Logan Creek), Ellington, Viburnum Trend District, Reynolds Co., Missouri, USA

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Latitude & Longitude (WGS84): 37° 21' 32'' North , 91° 8' 48'' West
Latitude & Longitude (decimal): 37.3590041605, -91.1468930529
Other regions containing this locality:North America

A former Pb-Zn occurrence/mine located about 12 miles NW of Ellington. Formerly owned by ASARCO since December, 1987 & operated by Ozark Lead Company. Reopened December, 1987. Later owned by the Doe Run Company, about 1999-2000.

Reserves in 1988 amounted to 22.6 million tons of ore at an average of 4.84% Pb & 0.59% Zn.

Mining Method: Room and Pillar. Drill+Blast with LHD or mine truck haulage to ore chutes below. After crushing underground, ore is hauled to a 20 foot diameter x 1,250 foot deep, central 3-compartment hoisting shaft.

Regional Geology: The Viburnum Trend is a 6 mile x 40 mile North-trending deposit discovered in the late 1950's and early 1960's whose Pb-Ag-Zn deposits are exploited by the Brushy Creek, Buick, Fletcher, Magmont, Sweetwater, West Fork, and Viburnum mines Nos. 27, 28, 29, and 35 at depths ranging from 1,000-1,450 feet.

The Viburnum Trend deposits differ from other Mississippi Valley-type lead-zinc ore deposits in that ores are shallower, they include nickel and cobalt minerals, and some copper-iron sulfides. Also, while ores were formed from hot, saline brines, it is generally accepted that for the Viburnum Trend, this was a repetitive precipitation and dissolution process for the sulfides, particularly galena and suggests that the ore-forming base metal constituents were transported with reduced sulfur in the same solutions, with precipitation initiated by a change in pH, dilution, and/or a decrease in temperature. For the Sweetwater ores, the repetitive precipitations comprised decreasing base metal concentrations in the mineralizing fluids.

Most ore minerals are found as sulfides such as galena, sphalerite, and chalcopyrite. Gangue minerals associated with the economic minerals include pyrite, calcite, dolomite, and quartz.

Sweetwater Geology: There are 8 distinct ore bodies distributed at depth within the Bonneterre formation. The Bonneterre itself comprises four facies; fore reef, reef complex, back reef, and shelf. These facies are petrographic units developed in response to sea level fluctuations and the distribution of Precambrian knobs and ridges in a shallow Cambrian sea. Oolitic and digitate stromatolite facies predominate in the mine, and stratigraphic relationships record a prograding sedimentary pattern during lower Bonneterre sedimentation that expresses as an interfingering of the planar stromatolitic burrowed lime mudstone (reef complex) facies with the digitate (back reef) facies.

Mineral List

24 valid minerals.

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.


American Institute of Mining, Metallurgical, and Petroleum Engineers (1970), A.I.M.E. World Symposium on Mining and Metallurgy of Lead and Zinc, D.O. Rausch and B.C. Mariacher, editors, A.I.M.E., New York, New York, volume I: 483-498.

Christiansen, C.R., and J.J. Scott (1970), Mining Systems in the New Lead Belt of Southeast Missouri, chapter 11, volume 1, of Lead & Zinc, A.I.M.E. Symposium, 1970: 206-217.

Engineering and Mining Journal (1970), The New Lead Belt (October, 1970): 67-78.

Ryan, J.P., and Martin, J.A. (1971), The Mineral Industry of Missouri, U.S. Bureau of Mines Minerals Yearbook, volume 2, Area Reports, Domestic: 423-435.

U.S. Bureau of Mines Yearbook (1971), Volume 2: 431.

Gerity, C.E. (1972), Ozark's Haulage System Gets the Lead Out, Mining Engineering (November, 1972): 41-44.

Lagergren, M.A., and A.W. Griffith (1973), Design Construction and Operation of Ozark Lead Company's Tailings Disposal System, Proceedings (entitled "Tailings Disposal Today") of the First International Tailing Symposium, October 31 - November 3, 1972, Miller Freeman Publications, San Francisco, California, 1973: 714-733.

Mouat, M.M., and C.W. Clendenin, Jr. (1975), Ozark Lead Company Mine, Viburnum Trend, Southeast Missouri, chapter in Guidebook to the Geology and Ore Deposits of Selected Mines, Missouri Department of Natural Resources Report of Investigations No. 58, 1975: 48-56.

Mouat, M.M., and Clendenin, C.W. (1977), Geology of the Ozark Lead Company Mine, Viburnum Trend, Southeast Missouri, Economic Geology: 72(3): 398-407.

White, T. G., and K. L. Clifford (1977), Milling of Lead-Zinc Ores - USA, chapter in Lead-Zinc Update, D.O. Rausch, F.M. Stephens, Jr., and B.C. Mariacher, editors, Society of Mining Engineers of the American Institute of Mining, Metallurgical and Petroleum Engineers, New York, New York: 125, 127, 135, 137, 140-143.

Mineralogical Record (1978): 9: 111-112.

Dressel, W. M. (1979), former state liaison officer, personal communications, August 2, 1979.

Weakly, L. A. (1982), Ore Moving Logistics for Room and Pillar Mines in the Viburnum Trend, Mining Engineering: April, 1982: 406-407.

Skillings Mining Review Magazine (1987), ASARCO Slates Sweetwater Mine for Limited Production (August 8, 1987): 3.

Economic Geology (1988): 83: 355-376

U.S. Bureau of Mines Minerals Yearbook - Zinc (1988): 2.

Mineralogical Record (1989): 20: 481.

Mining Magazine (1989), January: 45.

Rocks & Minerals (1989): 64: 22 & 26.

ASARCO Incorporated (1993), Securities and Exchange Commission Form 10-K Report (December 31, 1993): A16-A18.

Economic Geology (1993): 88: 957-960.

ASARCO Incorporated (1995), Securities and Exchange Commission Form 10-K Report.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10293984 & 10085082 (& 10196555 = mill).

American Mineral Treasures (2008), Lithographie, LLC: 66-73.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0291790008 (& 0291790009 = mill).

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