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Source: USGS Goldstrike (Post–Betze) Mine, Carlin Trend, Nevada, the largest Carlin-type deposit in the world, containing more than 35,000,000 ounces of gold. [1] Carlin-type gold ore from the Twin Creeks mine, Nevada, near the Getchell Mine. This is an auriferous, silicified-decalcified siltstone/mudstone from the Comus Formation (Lower ...
Production from the trend surpassed 50,000,000 troy ounces (1,600 t) of gold in 2002. The Carlin and other mines along the trend pioneered the method of open-pit mining with cyanide heap leach recovery that is today used at large low-grade gold mines worldwide. New ore deposits are still being discovered and developed along the trend.
In 2020 mining overall contributed $9.5 billion to the state's economy, $8.4 billion from gold and silver mining (all silver produced in Nevada is as a by-product from gold mining). Gold production from Nevada was higher than any other U.S. state, 4,632,690 troy ounces (144,090 kg) in 2020 (a decrease of 4.8% on 2019), accounting for 76% of ...
Like most Carlin type gold deposits in Nevada the gold was epithermally deposited in carbonate or silicate sedimentary rocks. The heat source was magmatic but the exact mechanism is still under debate. 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.
The gold deposit is a sediment-hosted disseminated Carlin–type deposit, with sub-micron sized gold distributed in pyrite and marcasite. [ 1 ] The mineral getchellite , a rare sulfide of arsenic and antimony , AsSbS 3 , was discovered at and named after the Getchell mine.
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In 1961, Carlin-type gold deposits were discovered near Carlin, Nevada. Paleozoic limestone, formed at the ancient continental margin, contains nearly microscopic gold associated with pyrite and arsenic sulfides and particularly jasperoid in folds and faults. Over 200 million ounces of gold are known to be distributed in more than 100 Carlin ...
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