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Lead Belt
From Wikipedia, the free encyclopedia
The Lead Belt is a lead mining district in the southeastern part of Missouri. Counties in the Lead Belt include Saint Francois, Crawford, Dent, Iron, Reynolds, and Washington. European lead mining started in 1720, by Philip Francois Renault of France, who lead a large exploratory mission in 1719 and started mining operations in Old Mines and Mine La Motte. The town of Sainte Genevieve was founded as a river port for transportation of lead out of the area. Moses Austin started large-scale mining, at Potosi, and smelting, at Herculaneum; this lead was originally used as a roofing material. Bonne Terre has large subterranean mines, now used commercially for recreational scuba diving.
The area of mining has changed over the years. The Old Lead Belt is centered around Park Hills, while the New Lead Belt or Viburnum Trend is near Viburnum. The Irish Wilderness in Ripley and Oregon Counties has significant lead ore; however, this is a protected wilderness area.
The formal geological name for the Lead Belt is the "Southeastern Missouri Mississippi Valley-type Mineral District." It contains the highest concentration of lead metal on the planet as well as significant economic quantities of zinc, copper, silver, and cadmium, which are also mined, as well as currently sub-economic quantities of metals such as nickel and cobalt. Most of the mined 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. Specimens from the Lead Belt are highly prized by gem and mineral collectors and are found in museums worldwide.
The ore minerals of the Lead Belt are primarily hosted by bacterial stromatolites and associated oolitic rocks of the Bonneterre Dolomite. This Cambrian age formation was deposited in a shallow sea around the Precambrian age St. Francois Mountains, which formed an island archipelago. Ore mineralization most likely occurred during the late Pennsylvanian and/or Permian periods when warm metal and petroleum bearing fluids from adjacent sedimentary basins migrated through these rocks.
The Lead Belt is the world's largest lead producing areas, producing roughly 92% of the U.S. primary supply as well as significant amounts of the nations' zinc and copper. In the year 2000, Missouri produced 313,105 tons, with an estimated value of $128,838,880. About 84% of the lead is used for lead-acid batteries, a secondary smelter in Boss, Mo recycles lead-acid batteries. Another major consumer of Missouri lead is Winchester Ammunition, located in East Alton, Illinois.
- Missouri Mines State Historic Site
- Map of the Mineral resources of Missouri PDF
- Missouri lead mining brochure PDF
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