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The formal geological name for the Lead Belt is the "Southeastern Missouri Mississippi Valley-type Mineral District". It contains the highest concentration of galena (lead(II) sulfide) in the world [2] as well as significant economic quantities of zinc, copper and silver and currently mined sub-economic quantities of metals such as cadmium, nickel and cobalt. [2]
The Tri-State district was a historic lead-zinc mining district located in present-day southwest Missouri, southeast Kansas and northeast Oklahoma. The district produced lead and zinc for over 100 years. Production began in the 1850s and 1860s in the Joplin - Granby area of Jasper and Newton counties of southwest Missouri. Production was ...
The largest deposit of uranium in the US is in Virginia at Coles Hill; however, the state's generous rainfall and occasional flooding (in contrast with typical American uranium mines in the dry and isolated desert southwest) have led to citizen concern about commercial-scale mining. [85]
The Betze-Post deposits are up to 6,000 feet (1,800 m) long, 600 feet (180 m) thick and 800 feet (240 m) wide. In 2018 the average gold grade was 0.109 troy ounces (3.4 g) per ton for open pit ore, and 0.274 troy ounces (8.5 g) per ton for underground pit ore, for a mine average of 0.230 troy ounces (7.2 g) per ton.
44% of mining facilities in the United States are located in forests. Large-scale mining in areas of Latin America, like Brazil, release pollutants detrimental to neighboring rainforests. [38] Copper mining efforts in the Carajas Mineral Province in Brazil result in 6,100 km of deforestation every year. [38]
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A specimen of stibnite. The Stibnite Mining District sits atop the Idaho Batholith, one of the signature features of Idaho’s unique geology.The Idaho Batholith is nearly 14,000 square miles (36,000 km 2) of granite, formed from the collision of the oceanic plate and the North American Plate around 100 million years ago during the Cretaceous period. [10]
Star City was established in 1861 when rich silver ore deposits were discovered in the area. During its height from 1864 to 1865 the town was home to 1,200 people. It also housed two hotels, three general stores, a Wells-Fargo office, a church and more than a dozen saloons.