| 词条 | Goldstrike mine |
| 释义 |
| name = Goldstrike Mine | image = File:Goldstrike mine 2016 satfoto.jpg | width = 350 | caption = Goldstrike Mine from space, 2016. The large Betze-Post open pit is labelled at top center. False color image: see source for details. | pushpin_map = Nevada | pushpin_label = Goldstrike Mine | pushpin_map_caption = Location in Nevada | coordinates = {{coord|40.981583|N|116.378964|W|region:US|format=dms|display=inline,title}} | place = Eureka County | subdivision_type = State | state/province = Nevada | country = United States | owner = Barrick Gold | official website = Goldstrike webpage | acquisition year = 1986 | stock_exchange = NYSE TSX | stock_code = ABX [https://web.archive.org/web/20081201001659/http://cxa.marketwatch.com/TSX/en/Market/quote.aspx?symb=ABX ABX] | products = Gold | financial year = 2016[1] | amount = {{convert|1096000|oz|kg}} | opening year = 1975 | closing year = }}Goldstrike is a gold mine in Eureka County in north-eastern Nevada. It is located on the Carlin Trend, a prolific gold mining district. It is owned and operated by the world's largest gold mining company, Barrick Gold. Goldstrike is the largest gold mine in North America. Since Barrick acquired Goldstrike in 1986 it has produced 42 million ounces of gold.[1] HistoryThe first discovery of gold in the Goldstrike property was in 1962 by Atlas Minerals. Gold was first mined from the upper, well-oxidized portion of what became the Post deposit in 1975 by PanCana Minerals Ltd., in a small open-pit heap leach operation. In 1978, Western State Minerals Corporation entered into a joint venture (JV) with PanCana. The JV delineated ore reserves for the Post deposit in 1986. Barrick acquired 100% ownership of the property in December 1986, and mining started in 1987.[3][1] GeologyThe Goldstrike mine complex (including the Betze-Post-Screamer and Meikle-Rodeo deposits) is the largest Carlin-type mine in the world.[2] The Goldstrike mine adjoins Newmont Mining's Carlin mine complex. Goldstrike is northwest of the Carlin mine on the Carlin Trend.[3] Like most Carlin type gold deposits in Nevada the gold was epithermally deposited in carbonate or silicate sedimentary rocks. The source of the heat was magmatic but the exact mechanism is still under debate. The Betze-Post deposits are up to {{convert|6000|ft|m}} long, {{convert|600|ft|m}} thick and {{convert|800|ft|m}} wide. In 2007 the average processed gold grade was {{convert|0.136|ozt|g}} per ton of ore, with a recovery rate of 85.5%.[4] Mining operationsThe Goldstrike complex consists of three distinct mines: the large Betze-Post open-pit mine, and the Meikle and Rodeo underground mines. The ore from all three mines is milled, oxidixed in either a roaster or an autoclave, then leached in either a carbon-in-leach (CIL) cyanidation circuit or a calcium thiosulfate circuit.[5] The two treatment facilities treat ores from both the open pit and underground mines. Recovered gold is processed into doré on-site and shipped to outside refineries for processing into gold bullion.[4] In 2015 the Betze-Post open-pit mine produced {{convert|642493|oz|kg|abbr=on}} of gold and {{convert|87223|oz|kg|abbr=on}} of silver, while the Meikle-Rodeo underground operations yielded {{convert|411003|oz|kg|abbr=on}} of gold and {{convert|17749|oz|kg|abbr=on}} of silver. This was 24% of the total {{convert|5339659|oz|kg|abbr=on}} output of all gold mining operations in Nevada for 2015. In 2016 Goldstrike produced 1,096,000 ounces of gold,[6][5] making it the third largest gold mine in the world. References1. ^{{cite web|last1=Moore|display-authors=etal|first1=Chester M.|title=Barrick Gold and Franco-Nevada - Goldstrike Mine, Project #1663|url=https://www.sec.gov/Archives/edgar/data/756894/000119312512137672/d325652dex991.htm|publisher=Roscoe Postle Associates Inc|accessdate=22 March 2017|location=Toronto, Ontario|date=16 March 2012}} 2. ^{{cite journal | doi = 10.1007/s00126-005-0477-9| url =http://deepblue.lib.umich.edu/bitstream/2027.42/46046/1/126_2005_Article_477.pdf | title = Evidence for a magmatic origin for Carlin-type gold deposits: isotopic composition of sulfur in the Betze-Post-Screamer Deposit, Nevada, USA | year = 2005 | last1 = Kesler | first1 = Stephen E. | last2 = Riciputi | first2 = Lee C. | last3 = Ye | first3 = Zaojun | journal = Mineralium Deposita | volume = 40 | pages = 127 }} 3. ^USGS, 1998, "Oreshoot Zoning in the Carlin-type Betze Orebody, Goldstrike Mine, Eureka County, Nevada", Open-File Report 98-620 (full text). See Figure 2 for mine locations and local geology 4. ^1 2 {{cite journal|last=Tsai|first=Peggy|title=Goldstrike Mine – Nevada’s Giant Golden Goose|journal=Mining.com Magazine|date=September 2008|pages=44–47|url=http://www.infomine.com/library/publications/docs/Mining.com/Sep2008i.pdf|accessdate=24 August 2011}} 5. ^1 2 3 {{cite web|title=Barrick 2017 Operations and Technical Update|url=http://www.barrick.com/files/presentation/2017/Barrick-2017-Operations-and-Technical-Update.pdf#page=170|website=Barrick Gold|accessdate=22 March 2017|page=170|format=pdf}} 6. ^{{cite web|last1=Perry|first1=Rick|last2=Visher |first2=Mike |title=Major Mines of Nevada 2015 |url=http://minerals.nv.gov/uploadedFiles/mineralsnvgov/content/Programs/Mining/MiningForms/mm2015_jph_1Nov16_NDOM_web.pdf|website=Nevada Division of Minerals|publisher=Nevada Bureau of Mines and Geology|accessdate=24 January 2017|format=pdf|date=1 November 2016}} External links
6 : Buildings and structures in Eureka County, Nevada|Gold mines in the United States|Gold mining in Nevada|Barrick Gold|Mines in Nevada|1975 establishments in Nevada |
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