|
Cortez Gold Mine
Cortez Gold Mine is a large gold mining and processing facility in Lander and Eureka County, Nevada, United States, located approximately southwest of Elko. It is owned as a joint venture between Barrick Gold Corporation (61.5%) and Newmont Corporation (38.5%), operated by Barrick, and comprises the Pipeline, Crossroads, and Cortez Hills open pit mines; and the Cortez Hills underground mine. Ore from the mines is treated at an oxide mill at the site and on leach pads, while refractory ore is shipped to Barrick’s Goldstrike operation for processing. Region history The Cortez Mountains has been mined since 1862, with silver being the primary commodity until the 1940s. The Gold Acres operation in the Cortez Mountains included open pit and underground mines in the 1930s and 1940s. Cortez Gold opened in 1968 and production ended in 1976. The United States Bureau of Mines built a pilot plant in 1969 which would make heap leaching for gold commercially viable by 1971. The low g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lander County, Nevada
Lander County is a county in the U.S. state of Nevada. As of the 2020 census, the population was 5,734. Its county seat is Battle Mountain. History Lander County was created in 1862 as the result of a mining boom on the Reese River along the old pony express line, taking a considerable portion of Churchill and Humboldt counties with it. Named for Frederick W. Lander, chief engineer of a federal wagon route and Special Indian Agent in the area, it was one of the original 11 counties of Nevada when statehood was granted in 1864. Its first county seat was Jacob's Spring in 1862, which was moved to Austin in 1863, and finally Battle Mountain in 1979. Eventually, Lander County would be known as the "mother of counties", since three other counties in Nevada were later formed from it: Elko, White Pine, and Eureka. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.5%) is water. The summit of Bunker Hill, located in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cortez Mill Complex Tier C
Cortez may refer to: Places United States * Cortez, California, an unincorporated community in Merced County * Cortez, Colorado, a city and county seat of Montezuma County * Cortez, Florida, a census-designated place * Cortez, Nevada, ghost town * Cortez, Pennsylvania, an unincorporated community Elsewhere * Sea of Cortez or Gulf of California, in Mexico Other uses * Cortez Motor Home, a Class-A motor coach made in the U.S. from 1963 to 1979 * Agnelli & Nelson or Cortez, trance music duo * Cortez, a character from ''The Longest Journey'' and ''Dreamfall'' * Cortez, a type of running shoe from Nike People Surname * Adrian T. Cortez (1978–2016), American trans woman and performer with the stage name Brittany CoxXx * Alberto Cortez (1940–2019), Argentine singer and songwriter * Alexandria Ocasio-Cortez (born 1989), American politician and educator * Amado Cortez (1928–2003), Filipino actor and diplomat * Antawn Cortez Jamison (born 1976), American basketball player ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Tinto Group
Rio Tinto Group is an Anglo-Australian multinational company that is the world's second-largest metals and mining corporation (behind BHP). The company was founded in 1873 when of a group of investors purchased a mine complex on the Rio Tinto, in Huelva, Spain, from the Spanish government. It has grown through a long series of mergers and acquisitions. Although primarily focused on extraction of minerals, Rio Tinto also has significant operations in refining, particularly the refining of bauxite and iron ore. Rio Tinto has joint head offices in London (global and "plc") and Melbourne ("Limited" Australia).Suburbs & Postcodes " City of Melbourne. R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Dollar
The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official currency of the United States and several other countries. The Coinage Act of 1792 introduced the U.S. dollar at par with the Spanish silver dollar, divided it into 100 cents, and authorized the minting of coins denominated in dollars and cents. U.S. banknotes are issued in the form of Federal Reserve Notes, popularly called greenbacks due to their predominantly green color. The monetary policy of the United States is conducted by the Federal Reserve System, which acts as the nation's central bank. The U.S. dollar was originally defined under a bimetallic standard of (0.7735 troy ounces) fine silver or, from 1837, fine gold, or $20.67 per troy ounce. The Gold Standard Act of 1900 linked the dollar solely to gold. From 1934, its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foothill
Foothills or piedmont are geographically defined as gradual increases in elevation at the base of a mountain range, higher hill range or an upland area. They are a transition zone between plains and low relief hills and the adjacent topographically higher mountains, hills, and uplands. Frequently foothills consist of alluvial fans, coalesced alluvial fans, and dissected plateaus. Description Foothills primarily border mountains, especially those which are reached through low ridges that increase in size closer and closer to the mountain, but can also border uplands and higher hills. Examples Areas where foothills exist, or areas commonly referred to as the foothills, include the: * Sierra Nevada foothills of California, USA * Foothills of the San Gabriel Valley in Los Angeles County, California, USA *Rocky Mountain Foothills in British Columbia and Alberta, Canada *Silesian Foothills in Silesia, Poland *Sivalik Hills along the Himalayas in the Indian subcontinent * Catalina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsidiary
A subsidiary, subsidiary company or daughter company is a company owned or controlled by another company, which is called the parent company or holding company. Two or more subsidiaries that either belong to the same parent company or having a same management being substantially controlled by same entity/group are called sister companies. The subsidiary can be a company (usually with limited liability) and may be a government- or state-owned enterprise. They are a common feature of modern business life, and most multinational corporations organize their operations in this way. Examples of holding companies are Berkshire Hathaway, Jefferies Financial Group, The Walt Disney Company, Warner Bros. Discovery, or Citigroup; as well as more focused companies such as IBM, Xerox, and Microsoft. These, and others, organize their businesses into national and functional subsidiaries, often with multiple levels of subsidiaries. Details Subsidiaries are separate, distinct legal entit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennecott Utah Copper
Kennecott Utah Copper LLC (KUC), a division of Rio Tinto Group, is a mining, smelting, and refining company. Its corporate headquarters are located in South Jordan, Utah. Kennecott operates the Bingham Canyon Mine, one of the largest open-pit copper mines in the world in Bingham Canyon, Salt Lake County, Utah. The company was first formed in 1898 as the Boston Consolidated Mining Company. The current corporation was formed in 1989. The mine and associated smelter produce 1% of the world's copper. History Utah Copper Company had its start when Enos Andrew Wall realized the potential of copper deposits in Bingham Canyon, southwest of Salt Lake City, Utah in 1887. He acquired claims to the land and started underground mining. In the mid-1890s, metallurgist Daniel C. Jackling and mining engineer Robert C. Gemmell inspected the property and liked the prospects. Both men examined Wall's properties and recommended open-pit mining. In 1898, Samuel Newhouse and Thomas Weir formed the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placer Dome
Placer Dome Inc. was a large mining company specializing in gold and other precious metals, with corporate headquarters in Vancouver, British Columbia, Canada. In August 2005, the company had interests in 16 gold mining operations in 7 countries; it had a market capitalization of $6.7 billion USD (on June 30, 2005). For the year 2004, it had sales of $1,888 million, net earnings of $284 million, and cash from operations of US$376 million. The company was purchased by Barrick Gold in 2006, and was assimilated into Barrick. History Placer Dome was formed in Vancouver in 1987, by amalgamating Placer Development Ltd. of Vancouver (founded in British Columbia in 1926), Dome Mines Limited of Toronto (founded in Ontario in 1910), and Campbell Red Lake Mines Ltd. of Toronto (founded in Ontario in 1944). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Extraction
Gold extraction refers to the processes required to extract gold from its ores. The great majority of gold is extracted from dilute ores using a combination of chemical processes. About 2000 tons are obtained from the earth annually, plus another 300 tons from recycling. Types of ore Gold occurs principally as a native metal, i.e., gold itself. Sometimes it is alloyed to a greater or lesser extent with silver, which is called electrum. Native gold can occur as sizeable nuggets, as fine grains or flakes in alluvial deposits, or as grains or microscopic particles (known as colour) embedded in rock minerals. Other forms of gold are the minerals calaverite (AuTe), aurostibnite (AuSb2), and maldonite (Au2Bi). These latter three, although rarer that native gold, can be slow to react with cyanide and thus difficult to process. Still other gold-containing ores include various tellurides (sylvanite, nagyagite, petzite, and krennerite). Certain contaminants in ores can interfere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heap Leaching
Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of chemical reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ore, whereas ''in situ'' mining lacks these liners and pulls pregnant solution up to obtain the minerals. Heap leaching is widely used in modern large-scale mining operations as it produces the desired concentrates at a lower cost compared to conventional processing methods such as flotation, agitation, and vat leaching. Additionally, dump leaching is an essential part of most copper mining operations and determines the quality grade of the produced material along with other factors Due to the profitability that the dump leaching has on the mining process, i.e. it can contribute substa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Plant
A pilot plant is a pre-commercial production system that employs new production technology and/or produces small volumes of new technology-based products, mainly for the purpose of learning about the new technology. The knowledge obtained is then used for design of full-scale production systems and commercial products, as well as for identification of further research objectives and support of investment decisions. Other (non-technical) purposes include gaining public support for new technologies and questioning government regulations. Pilot plant is a relative term in the sense that pilot plants are typically smaller than full-scale production plants, but are built in a range of sizes. Also, as pilot plants are intended for learning, they typically are more flexible, possibly at the expense of economy. Some pilot plants are built in laboratories using stock lab equipment, while others require substantial engineering efforts, cost millions of dollars, and are custom-assembled and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Bureau Of Mines
For most of the 20th century, the United States Bureau of Mines (USBM) was the primary United States government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources. The Bureau was abolished in 1996. Summary USBM was established in the Department of the Interior on May 16, 1910, pursuant to the Organic Act (Public Law 179), to deal with a wave of catastrophic mine disasters. The Bureau's mission was gradually expanded to include: * The conduct of research to enhance the safety, health, and environmental impact of mining and processing of minerals and materials. * The collection, analysis, and dissemination of information about mining and processing of more than 100 mineral commodities across the Nation and in more than 185 countries around the world. * Analysis of the impact of proposed mineral-related laws and regulations upon the national interest. * Production, conservation, sale, and d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
