Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of (Fe,Mn)WO4 that is the intermediate mineral between ferberite (Fe2+ rich) and hübnerite (Mn2+ rich). Along with scheelite, the wolframite series are the most important tungsten ore minerals. Wolframite is found in quartz veins and pegmatites associated with granitic intrusives. Associated minerals include cassiterite, scheelite, bismuth, quartz, pyrite, galena, sphalerite, and arsenopyrite.
Scheelite is a calcium tungstate mineral with the chemical formula CaWO4. It is an important ore of tungsten (wolfram). Scheelite is originally named after Swedish chemist Carl Wilhelm Scheele (1742–1786). Well-formed crystals are sought by collectors and are occasionally fashioned into gemstones when suitably free of flaws. Scheelite has been synthesized using the Czochralski process; the material produced may be used to imitate diamond, as a scintillator, or as a solid-state lasing medium. It was also used in radium paint in the same fashion as was zinc sulphide, and Thomas Edison invented a fluoroscope with a calcium tungstate-coated screen, making the images six times brighter than those with barium platinocyanide; the latter chemical allowed Röntgen to discover X-rays in early November 1895.
Nova Lima is a municipality of about 87,000 people, whose downtown is located about 20 kilometers south of Belo Horizonte, the capital of the south-eastern Brazilian state of Minas Gerais. Mining is one of the main economical activities of the city, including the extraction of Iron Ore and Gold. The most famous mine in the city is Morro Velho, a gold mine of 2,700 metres (8,900 ft) depth.
The Federal University of Rio Grande do Norte is a public Brazilian university funded by the Brazilian federal government, located in the city of Natal, Rio Grande do Norte, Brazil.
Mining in the United Kingdom produces a wide variety of fossil fuels, metals, and industrial minerals due to its complex geology. In 2013, there were over 2,000 active mines, quarries, and offshore drilling sites on the continental land mass of the United Kingdom producing £34bn of minerals and employing 36,000 people.
The Currais Novos River is a river of Rio Grande do Norte state in northeastern Brazil.
Pontal do Paraná is a municipality in the state of Paraná in the Southern Region of Brazil.
Campo Redondo is a municipality in the state of Rio Grande do Norte in the Northeast region of Brazil. According to the census conducted by the IBGE in the year 2010, its population is 10 427 inhabitants. In 2022, the same body carried out the demographic census of 2022 and released the previous results of the Census. According to IBGE, Campo Redondo had a population deficit, with 210 fewer inhabitants compared to the 2010 Census. The territorial extension of the municipality is 213 km².
Currais Novos is a municipality in the state of Rio Grande do Norte in the Northeast region of Brazil. As of 2020, the population was estimated at 44,905.
The Estádio Municipal Coronel José Bezerra, nicknamed Bezerrão, is a football stadium located in Currais Novos, Rio Grande do Norte state, Brazil. It is currently used mostly for football games and is the home stadium of Associação Cultural e Desportiva Potyguar Seridoense. The stadium holds 2,000 people, and was built in 1967. The stadium is owned by the Currais Novos City Hall.
Apertados Canyon is a canyon located in Currais Novos, Rio Grande do Norte, Brazil. The Picuí and Currais Novos Rivers carved the canyon through the granite bedrock of the Chapéu mountains along the border with the state of Paraíba.
Seridó Oriental is a microregion in the Brazilian state of Rio Grande do Norte. It has a total area of 3,825.73 square kilometers.
The Målviken mine is a large open pit mine located near Mosjøen in the northern part of Norway in Nordland. Målviken represents one of the largest tungsten reserves in Norway having estimated reserves of 2.51 million tonnes of ore grading 0.9% tungsten.
The Nui Phao mine is a large open pit mine located in the northern part of Vietnam in Thái Nguyên Province. Nui Phao represents one of the largest tungsten reserves in Vietnam having estimated reserves of 55.4 million tonnes of ore grading 0.21% tungsten.
The Mt Lindsay mine is a large open pit mine located in the northwest of Tasmania, Australia. Mt Lindsay represents one of the largest tungsten reserves in Australia having estimated reserves of 43 million tonnes of ore grading 0.1% tungsten. 40 million tonnes would support a 10-year mining operation. The mine is owned by Venture Minerals.
The Nyamuliro mine is a large open pit mine located in the south western part of Uganda in Western Region. Nyamuliro represents one of the largest tungsten reserves in Uganda having estimated reserves of 10 million tonnes of ore grading 0.5% tungsten.
The Ruhijha mine is a large open pit mine located in the northeastern part of Uganda in Eastern Region. Ruhijha represents one of the largest tungsten reserves in Uganda having estimated reserves of 30 million tonnes of ore grading 0.5% tungsten.
Maria Magnólia de Souza Figueiredo is a retired Brazilian athlete who competed in the 400 and 800 metres. She represented her country at the 1988 and 1996 Summer Olympics, as well as four World Championships.
The Ilhas dos Currais Marine National Park is a national park in the state of Paraná, Brazil. It protects an important nesting site for birds, and is a refuge and feeding ground for fish including two endangered species of grouper. It may be visited for diving, but visitors must be careful to avoid any impact on the environment.
