West Fork Mine, West Fork, Viburnum Trend District, Reynolds Co., Missouri, USA
|Latitude & Longitude (WGS84):||37° 29' 31'' North , 91° 6' 37'' West|
|Latitude & Longitude (decimal):||37.4919560982, -91.1103074391|
A Pb-Zn-Ag-Cu occurrence/mine located 0.1 km (0.0 mile) E of West Fork (proper) and 14.4 km (9.0 miles) WNW of Centerville. The mine was initially developed and operated by ASARCO, Inc., and sold to The Doe Run Company in 1998.
Reached full production of 3,400 tons/day of ore in August 1988. Produces 46,000 tons Pb, 6,800 tons Zn, 3,900 kg Ag per year.
14 valid minerals.
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 Macrostrat.org
485.4 - 497 Ma
|Eminence Dolomite, Potosi Dolomite|
Age: Furongian (485.4 - 497 Ma)
Comments: Eminence Dolomite- (350 ft. max) massive bedded dolomite with some chert blocks, boulders and nodules; Potosi Dolomite- (300 ft. max) massive bedded dolomite with abundant quart druse chert. Some copper production at contact of Eminence Dolomite with Precambrian rhyolite.
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. 
Minerals Yearbook (1988) - Zinc: 2.
Rocks & Minerals (1989): 64: 23.
Mavrogenes, J.A., Hagni, R.D., and Dingess, P.R. (1992) Mineralogy, paragenesis, and mineral zoning of the West Fork Mine, Viburnum Trend, Southeast Missouri, Economic Geology: 87 (1): 113-124.
Lapis (1992): 17(1): 15-23.
Economic Geology (1995): 90: 228-245.
Rocks & Minerals (1998): 73(2): 98-117.
American Mineral Treasures (2008), Lithographie, LLC: 66-73.