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Mercury, a major component in the cinnabar-rich rocks in Idria, could be economically extracted to support nearby gold mining and processing operations. Idria eventually became the second most productive mercury mine in North America, producing over 38 million pounds of mercury during its lifetime. Mercury mining operations ceased in 1972, with ...
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.
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 ...
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In 2018, the deposit had estimated proven and probable reserves of 3,369 million tonnes of ore grading 0.23% copper and 0.02% molybdenum, along with an additional resource of 1,378 million tonnes of mineralized material at 0.17% copper and 0.02% molybdenum.
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 mining wastes at the closed mining site have been investigated by the US Environmental Protection Agency (EPA). Since 2000, it has spent approximately $6 million addressing this issue and ARCO has spent $2.7 million to clean the site. [6] In 2009, ARCO committed to spending $10.2 million (~$14.1 million in 2023) for future and past cleanup ...