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Goldstrike Mine
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 Barrick Gold. Since Barrick acquired Goldstrike in 1986, until 2018 it produced 44.4 million ounces of gold. History The 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. Geology The Goldstrike mine complex comprises the Betze-Post-Screamer and Meikle-Rodeo deposits. The Goldstrike mine adjoins Newmont Mining's Carlin mine complex. Goldstrike is northwest of the Carlin mine on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eureka County
Eureka County is a County (United States), county in the U.S. state of Nevada. As of the 2020 United States Census, 2020 census, the population was 1,855, making it the second-least populous county in Nevada. Its county seat is Eureka, Nevada, Eureka. Eureka County is part of the Elko, Nevada, Elko Elko micropolitan area, Micropolitan Statistical Area. History Eureka County was established in 1873 and formed from Lander County, Nevada, Lander County after silver was discovered more than east of Austin, Nevada, Austin. The new mining camp's residents complained Austin was too far to go for county business and a new county was created. It was named for the ancient Greek language, Greek term, ''Eureka (word), Eureka'', meaning, "I have found it." This term was used earlier in California and other locations. Eureka has always been the county seat. Geography According to the U.S. Census Bureau, the county has an area of , of which is land and (0.1%) is water. The county's highe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sedimentary Rock
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock are called sediment, and may be composed of geological detritus (minerals) or biological detritus (organic matter). The geological detritus originated from weathering and erosion of existing rocks, or from the solidification of molten lava blobs erupted by volcanoes. The geological detritus is transported to the place of deposition by water, wind, ice or mass movement, which are called agents of denudation. Biological detritus was formed by bodies and parts (mainly shells) of dead aquatic organisms, as well as their fecal mass, suspended in water and slowly piling up on the floor of water bodies (marine snow). Sedimentation may also occur as dissolved minerals precipitate from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buildings And Structures In Eureka County, Nevada
A building, or edifice, is an enclosed structure with a roof and walls standing more or less permanently in one place, such as a house or factory (although there's also portable buildings). Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for a wide number of factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and aesthetic reasons. To better understand the term ''building'' compare the list of nonbuilding structures. Buildings serve several societal needs – primarily as shelter from weather, security, living space, privacy, to store belongings, and to comfortably live and work. A building as a shelter represents a physical division of the human habitat (a place of comfort and safety) and the ''outside'' (a place that at times may be harsh and harmful). Ever since the first cave paintings, buildings have also become objects or canvasses of much artis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flickr
Flickr ( ; ) is an American image hosting and video hosting service, as well as an online community, founded in Canada and headquartered in the United States. It was created by Ludicorp in 2004 and was a popular way for amateur and professional photographers to host high-resolution photos. It has changed ownership several times and has been owned by SmugMug since April 20, 2018. Flickr had a total of 112 million registered members and more than 3.5 million new images uploaded daily. On August 5, 2011, the site reported that it was hosting more than 6 billion images. Photos and videos can be accessed from Flickr without the need to register an account, but an account must be made to upload content to the site. Registering an account also allows users to create a profile page containing photos and videos that the user has uploaded and also grants the ability to add another Flickr user as a contact. For mobile users, Flickr has official mobile apps for iOS, Android, and an op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Active Gold Mines In Nevada
Gold mining is a major industry in the U.S. State of Nevada. 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, in 2020 (a decrease of 4.8% on 2019), accounting for 76% of gold produced in the United States and 4.5% of the world's production. The United States ranks fourth, behind China, Australia and Russia. The Nevada mining industry supported an average 15,136 direct employees in 2020, with about 75,000 additional jobs related to providing goods and services needed by the mining industry. The following is a list of active gold mines in Nevada. __TOC__ List of active gold mines See also * Gold mining in Nevada * Nevada Gold Mines Notes * Carlin consists of three open pits and four underground mines: Gold Quarry, Emigrant/Rain, Chukar, Exodus, Pete Bajo & Leeville. * Rochester ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Mining In Nevada
Gold mining in Nevada, a state of the United States, is a major industry, and one of the largest sources of gold in the world. In 2018 Nevada produced , representing 78% of US gold and 5.0% of the world's production. Total gold production recorded from Nevada from 1835 to 2017 totals , worth US$322.6 billion at 2020 values. Much of Nevada's gold production comes from large open pit mining using heap leaching recovery. The Nevada mining industry supported an average 14,787 direct employees in 2018, with about 75,000 additional jobs related to providing goods and services needed by the mining industry. The average pay for mining industry employees during this time was $97,600 per year, the third highest average private employment sector in the state. Major mining companies such as Newmont Goldcorp and Barrick Gold Corporation operate many of the state's gold mines. Active mines include those at Jerritt Canyon and the Carlin Trend. Although Nevada was known much more for silver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bullion
Bullion is non-ferrous metal that has been refined to a high standard of elemental purity. The term is ordinarily applied to bulk metal used in the production of coins and especially to precious metals such as gold and silver. It comes from the Anglo-Norman term for a melting-house where metal was refined, and earlier from French , "boiling". Although precious metal bullion is no longer used to make coins for general circulation, it continues to be held as an investment with a reputation for stability in periods of economic uncertainty. To assess the purity of gold bullion, the centuries-old technique of fire assay is still employed, together with modern spectroscopic instrumentation, to accurately determine its quality. As investment The specifications of bullion are often regulated by market bodies or legislation. In the European Union, the minimum purity for gold to be referred to as "bullion", which is treated as investment gold with regard to taxation, is 99.5% for gol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doré Bar
DOR, Dor, or DoR may refer to: Computer games and characters * '' Advance Wars: Days of Ruin'', a turn-based tactics video game for the Nintendo DS * Dor, a magician in the fictional Xanth universe; see Magicians of Xanth * ''WWE Day of Reckoning'', a Nintendo Gamecube video game Geography * Dör, a village in Hungary * Dor, Iran, a village in Isfahan Province, Iran * Dor, Israel, a moshav in northern Israel * Ein Dor, a kibbutz in northern Israel * Tel Dor, an archaeological site in Israel on the site of Dor or Dora, an ancient royal city of the Canaanites * Dori Airport, an airport in Burkina Faso with the IATA code DOR * Dorset, county in England, Chapman code People Given name * Dor Bahadur Bista (born ca. 1924–1926), Nepalese anthropologist, social scientist and activist * Dor Daniel (born 1982), Israeli singer songwriter * Dor Elo (born 1993), Israeli football player * D'or Fischer (born 1981), American-Israeli basketball player * Dor Guez (born ca. 1980), Israeli ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thiosulfate
Thiosulfate ( IUPAC-recommended spelling; sometimes thiosulphate in British English) is an oxyanion of sulfur with the chemical formula . Thiosulfate also refers to the compounds containing this anion, which are the salts of thiosulfuric acid, e.g. sodium thiosulfate . Thiosulfate also refers to the esters of thiosulfuric acid, e.g. ''O'',''S''-dimethyl thiosulfate . The prefix thio- indicates that the thiosulfate is a sulfate with one oxygen replaced by sulfur. Thiosulfate is tetrahedral at the central S atom. Thiosulfate salts occur naturally. Thiosulfate ion has C3v symmetry, and is produced by certain biochemical processes. It rapidly dechlorinates water and is notable for its use to halt bleaching in the paper-making industry. Thiosulfate salts are mainly used in dying in textiles and the bleaching of natural substances. Sodium thiosulfate, commonly called ''hypo'' (from "hyposulfite"), was widely used in photography to fix black and white negatives and prints after the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Cyanidation
Gold cyanidation (also known as the cyanide process or the MacArthur-Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. Cyanidation is also widely used in the extraction of silver, usually after froth flotation. Production of reagents for mineral processing to recover gold represents more than 70% of cyanide consumption globally. Other metals are recovered from the process include copper, zinc, and silver, but gold is the main driver of this technology. Due to the highly poisonous nature of cyanide, the process is controversial and its use is even banned in some parts of the world. Cyanide can be safely used in the gold mining industry. A key feature for safe use of cyanide is to ensure adequate pH control at an alkaline pH level above 10.5. At industrial scale, pH control is mainly achieved using lime, as an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaching (metallurgy)
Leaching is a process widely used in extractive metallurgy where ore is treated with chemicals to convert the valuable metals within into soluble salts while the impurity remains insoluble. These can then be washed out and processed to give the pure metal; the materials left over are commonly known as tailings. Compared to pyrometallurgy, leaching is easier to perform, requires less energy and is potentially less harmful as no gaseous pollution occurs. Drawbacks of leaching include its lower efficiency and the often significant quantities of waste effluent and tailings produced, which are usually either highly acidic or alkali as well as toxic (e.g. bauxite tailings). There are four types of leaching: # Cyanide leaching (e.g. gold ore) # Ammonia leaching (e.g. crushed ore) # Alkali leaching (e.g. bauxite ore) # Acid leaching (e.g. sulfide ore) Chemistry Leaching is done in long pressure vessels which are cylindrical (horizontal or vertical) or of horizontal tube form know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground Mining (hard Rock)
Underground hard-rock mining refers to various underground mining techniques used to excavate "hard" minerals, usually those containing metals, such as ore containing gold, silver, iron, copper, zinc, nickel, tin, and lead. It also involves the same techniques used to excavate ores of gems, such as diamonds and rubies. Soft-rock mining refers to the excavation of softer minerals, such as salt, coal, and oil sands. Mine access Underground access Accessing underground ore can be achieved via a decline (ramp), inclined vertical shaft or adit. *Declines can be a spiral tunnel which circles either the flank of the deposit or circles around the deposit. The decline begins with a box cut, which is the portal to the surface. Depending on the amount of overburden and quality of bedrock, a galvanized steel culvert may be required for safety purposes. They may also be started into the wall of an open cut mine. *Shafts are vertical excavations sunk adjacent to an ore body. Shafts are s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
