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Bauxite | ore | Britannica

Bauxite, rock largely composed of a mixture of hydrous aluminum oxides. Bauxite is the principal ore of aluminum. Bauxites vary physically according to the origin and geologic history of their deposits: some deposits are soft, easily crushed, and structureless; some are hard, dense, and pisolitic,

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Gold rush - Wikipedia

A gold rush or gold fever is a discovery of gold—sometimes accompanied by other precious metals and rare-earth minerals—that brings an onrush of miners seeking their fortune. Major gold rushes took place in the 19th century in Australia, New Zealand, Brazil, Canada, South Africa, and the United States, while smaller gold rushes took place elsewhere.

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Troy delivers high-grade gold boost in South America | The ...

Apr 30, 2021· Troy Resources has delivered more impressive high-grade gold hits as it looks to grow the ounces beneath its operating Smarts open pit gold mine in Guyana, South America. One recent 3 metre drill intercept graded 17.35 grams per tonne gold from 176 metres and the company managed to grow its gold production for the March by a whopping 75 per ...

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Gold rush | Britannica

Gold rush, rapid influx of fortune seekers to the site of newly discovered gold deposits. Major gold rushes occurred in the United States, Australia, Canada, and South Africa in the 19th century. The first major gold strike in North America occurred near Dahlonega, Georgia, in the late 1820s. It

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Gold mining - Wikipedia

Barrick Gold Corporation has one of the largest open-pit gold mines in North America located on its Goldstrike mine property in north eastern Nevada. Other gold mines use underground mining, where the ore is extracted through tunnels or shafts. South Africa has the world''s deepest hard rock gold mine up to 3,900 metres (12,800 ft) underground.

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Iron oxide copper gold ore deposits - Wikipedia

Iron oxide copper gold ore deposits (IOCG) are important and highly valuable concentrations of copper, gold and uranium ores hosted within iron oxide dominant gangue assemblages which share a common genetic origin. These ore bodies range from around 10 million to >4,000 million tonnes of contained ore, and have a grade of between 0.2% and 5% copper, with gold contents ranging from …

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NORTH AMERICA | Freeport-McMoRan

In North America, FCX operates seven open-pit copper mines — Morenci, Bagdad, Safford, Sierrita and Miami in Arizona, and Chino and Tyrone in New Mexico; and two molybdenum mines — Henderson and Climax in Colorado. Molybdenum concentrate, gold and silver are also produced by certain of FCX''s North America copper mines.

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Portland, Oregon - Wikipedia

Portland (/ ˈ p ɔːr t l ə n d /, PORT-lənd) is the largest and most populous city in the U.S. state of Oregon and the seat of Multnomah County is a major port in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia rivers in Northwestern Oregon. As of 2019, Portland had an estimated population of 654,741, making it the 26th most ...

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South America Continent | The 7 Continents of the World

South America continues to provide the world with extensive mineral resources, including silver, gold, iron ore, copper, petroleum, and tin. These mining and exportation of these minerals have brought significant economic growth through a consistent source of income.

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Gold processing | Britannica

Gold processing, preparation of the ore for use in various products.. For thousands of years the word gold has connoted something of beauty or value. These images are derived from two properties of gold, its colour and its chemical stability.The colour of gold is due to the electronic structure of the gold atom, which absorbs electromagnetic radiation with wavelengths less than 5600 angstroms ...

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Troy delivers high-grade gold boost in South America ...

Apr 30, 2021· Troy Resources has delivered more impressive high-grade gold hits as it looks to grow the ounces beneath its operating Smarts open pit gold mine in Guyana, South America. One recent 3 metre drill intercept graded 17.35 grams per tonne gold from 176 metres and the company managed to grow its gold production for the March by a whopping 75 per cent from 4,195 ounces in the

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British mining giant Anglo American reaches renewable ...

Apr 15, 2021· Gold Live! iOS; Gold Live! ... Anglo American said that having already secured renewable energy to meet all its power requirements for its iron ore and nickel operations in Brazil from 2022, and for its copper operations in Chile from 2021, Anglo American has now signed an agreement with Engie Energía Perú to provide renewable energy for ...

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Latin America Economic Outlook | Data, Statistics ...

Jan 19, 2021· Comprehensive national accounts data from across the region confirmed that Latin America''s recovery lost steam at the start of the year. Regional GDP increased a moderate 1.6% year-on-year in the first quarter, matching last month''s preliminary reading and marking a slowdown from the fourth quarter''s 2.0% expansion. Over half of the region''s economies—including major players

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Comstock Lode - Wikipedia

The Comstock Lode is a lode of silver ore located under the eastern slope of Mount Davidson, a peak in the ia Range in ia City, Nevada (then western Utah Territory), which was the first major discovery of silver ore in the United States and named after American miner Henry Comstock.. After the discovery was made public in 1859, it sparked a silver rush of prospectors to the area ...

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Welcome to the SEDAR Web Site / Bienvenue au Site Web SEDAR

Access securities related information for Canadian companies.

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