||This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: see talk. (November 2013)|
Goldstrike Mine seen at an altitude of 38,000 feet
|Products||Gold , Silver|
|Production||Gold: 1,706,137 ounces (48,368.2 kg)
Silver: 204,324 ounces (5,792.5 kg)
Barrick Goldstrike is a gold mine in North Eastern Nevada, Lynn District, Eureka County. It is located on the Carlin Trend where several other mines are found. Barrick Gold started mining Goldstrike in 1986. It is a part of the largest gold mining company in North America, Barrick. Goldstrike is the largest gold mine in North America.
The Goldstrike consist of three distinct mines. The large open-pit mine Betze-Post and the two underground mines Meikle and Rodeo. The ore of all three mines is milled and heap leached with the cyanide process.
The Carlin-type gold deposits host gold mostly in invisible fine grains. For the extraction the milled gold ore is leached with toxic cyanide in the process. In this process large amounts of cyanide containing waste water has to be stored in ponds after the gold is separated from the water. The ore is ginned and then either leached in autoclaves or with heap leaching techniques. For the leaching the ore is put on plastic foil to prevent contamination and to drain the gold containing leaching solution. The cyanide containing liquid is applied to the top of the heap and the liquid slowly passes through the heap.
In 2008 the mining from the open-pit mine Betze-Post yielded 1,281,450 oz (36,328 kg) of gold and 152,886 oz (4,334.2 kg) of silver, while the underground operations in the Meikle mine yielded 424,687 oz (12,039.7 kg) of gold and 51,438 oz (1,458.2 kg) of silver. This is 30% of the total 5,698,000 oz (161,500 kg) output of all gold mining operations in Nevada.
Like most Carlin type gold deposit in Nevada the gold was epithermally deposited in carbonate or silicate sedimentary rocks. The source of the heat is magmatic but the exact mechanism is still under debate. The Betze Post deposit is up to 450 m thick and spans between 2300 m width with a length of 3000 m. The average gold amount per ton of ore is 0.136 oz.
- "Geologie und wirtschaftliche Bedeutung der Goldstrike Lagerstätte". Retrieved 2010-06-06.[dead link]
- Doug Driesner and Alan Coyner. "Major Mines of Nevada 2008 - Mineral Industries in Nevada’s Economy". The Nevada Division of Minerals. Retrieved 2010-06-06.
- Tsai, Peggy (September 2008). "Goldstrike Mine – Nevada’s Giant Golden Goose". Mining.com Magazine: 44–47. Retrieved 24 August 2011.