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Robinson Mine
The Robinson Mine is a porphyry copper deposit located at Ruth, White Pine County, Nevada, in the Egan Range, west of Ely. The mine comprises three large open pits: Liberty, Tripp-Veteran and Ruth. The ore is extracted using conventional surface methods, and is then processed into a copper-gold concentrate, and a molybdenum concentrate in a concentrating plant. Since 2012 the mine has been owned and operated by Polish copper miner KGHM Polska Miedź Large-scale copper mining began in the district in 1907 and, with some hiatuses and several changes of ownership, continues in 2019. Production from 1908 to 1978 was more than 4 billion pounds (1.5 million tonnes) of copper and of gold, and 2018 annual production of 106 million pounds (48,000 tonnes) of copper and of gold. Published ore reserves at Robinson as of end of 2017 were of copper. Current plans are for the mine to operate until 2022 before closure and reclamation. History and current operations Around 1868, prospector ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Pine County
White Pine County is a largely rural, mountain county along the central eastern boundary of the U.S. state of Nevada. As of the 2010 census, the population was 10,030. Its county seat is Ely. The name "(Rocky Mountain) white pine" is an old name for the limber pine (''Pinus flexilis''), a common tree in the county's mountains. The county boasts dark skies, clean air and millions of acres of unspoiled public land. It is the home of Great Basin National Park, one of America's most remote and least visited national parks. It is also home to no less than 14 federally designated wilderness areas, offering an abundance of terrain available to explore for hikers, backpackers, skiers, hunters and anglers. The Ely Shoshone Indian Reservation is located in the county, on the south side of the City of Ely. The reservation has a land area of 104.99 acres (0.4249 km2) and a 2000 census official resident population of 133 people. History European settlement in White Pine County beg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Mine
Gold Mine may refer to: *Gold Mine (board game) *Gold Mine (Long Beach), an arena *"Gold Mine", a song by Joyner Lucas from the 2020 album '' ADHD'' See also * ''Gold'' (1974 film), based on the novel ''Gold Mine'' by Wilbur Smith *Gold mining Gold mining is the extraction of gold resources by mining. Historically, mining gold from alluvial deposits used manual separation processes, such as gold panning. However, with the expansion of gold mining to ores that are not on the surface, ... * Goldmine (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestones
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limestone co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadra FNX Mining
Quadra FNX Mining Ltd was a Vancouver, British Columbia-based company that produced copper, nickel, platinum, palladium, gold, cobalt, and molybdenum with operations in Nevada, Arizona, Chile, Greenland, and the Sudbury Basin, Ontario, Canada. Quadra FNX Mining was created by a merger of Quadra Mining Ltd. and FNX Mining Company Inc. in 2010. The company was taken over by KGHM Polska Miedz S.A. in 2012. Quadra history Quadra Resources Ltd. was incorporated in Vancouver, British Columbia on 15 May, 2002. The Company changed its name from Quadra Resources Ltd. to Quadra Mining Ltd. on 9 January, 2003. On 8 April, 2004, Quadra Mining Ltd. completed an initial public offering raising approximately $145 million. Quadra used a portion of the proceeds of the offering to acquire the interest in the Robinson Mine located near Ely, Nevada. FNX history FNX Mining Company Inc. was incorporated in Toronto, Ontario on 26 June, 1984. A former Inco geologist, Terry MacGibbon, took over the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma Copper
Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besides molten rock, magma may also contain suspended crystals and gas bubbles. Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing. Following its ascent through the crust, magma may feed a volcano and be extruded as lava, or it may solidify underground to form an intrusion, such as a dik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
McGill, Nevada
McGill is a census-designated place (CDP) in White Pine County, Nevada, United States. The population was 1,148 at the 2010 census. History In 1872, John Cowger established a ranch in the Steptoe Valley and acquired the water rights for the area. William Lyons and William McGill purchased the ranch in 1886. A post office was established at the ranch, now named McGill Ranch, in 1891. The Nevada Consolidated Copper Company had numerous mines in the region and was seeking a partner to create a smelter in the area. The Cumberland and Ely Mining Corporation had acquired of land near the ranch and thought it would be ideal for a smelter location due to access to a plentiful water source. The two companies formed a partnership, the Steptoe Valley Smelting and Mining Company. In 1906, a pipeline was built to bring water from Duck Creek to reservoirs near the smelter site and construction began on the smelter. The smelter was completed and operations began on May 15, 1908. The fir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kennecott 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guggenheim Family
The Guggenheim family ( ) is an American-Jewish family known for making their fortune in the mining industry, in the early 20th century, especially in the United States and South America. After World War I, many family members withdrew from the businesses and became involved in philanthropy, especially in the arts, aviation, medicine, and culture. History Meyer Guggenheim, a Swiss citizen of Ashkenazi Jewish ancestry, arrived in the United States in 1847. His surname was derived from the Alsatian village of Gugenheim. He married Barbara Meyer, whom he met in the United States. Over the next few decades, their several children and descendants became known for their global successes in mining and smelting businesses, under the name Guggenheim Exploration, including the American Smelting and Refining Company. In the early 20th century, the family developed one of the largest fortunes in the world. Following World War I, they sold their global mining interests and later purch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open-pit Mining
Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface. It is applied to ore or rocks found at the surface because the overburden is relatively thin or the material of interest is structurally unsuitable for tunnelling (as would be the case for cinder, sand, and gravel). In contrast, minerals that have been found underground but are difficult to retrieve due to hard rock, can be reached using a form of underground mining. To create an open-pit mine, the miners must determine the information of the ore that is underground. This is done through drilling of probe holes in the ground, then plotting ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Depression
The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagion began around September and led to the Wall Street stock market crash of October 24 (Black Thursday). It was the longest, deepest, and most widespread depression of the 20th century. Between 1929 and 1932, worldwide gross domestic product (GDP) fell by an estimated 15%. By comparison, worldwide GDP fell by less than 1% from 2008 to 2009 during the Great Recession. Some economies started to recover by the mid-1930s. However, in many countries, the negative effects of the Great Depression lasted until the beginning of World War II. Devastating effects were seen in both rich and poor countries with falling personal income, prices, tax revenues, and profits. International trade fell by more than 50%, unemployment in the U.S. rose to 23% and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
