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Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its pure form (rare), it is typically a rose-red colour, but it can also be shades of pink to pale brown. It streaks white, and its Mohs hardness varies between 3.5 and 4.5. Its specific gravity is between 3.45 and 3.6. It crystallizes in the trigonal system, and cleaves with rhombohedral carbonate cleavage in three directions. The crystal structure of rhodochrosite is a rhombohedral system, which is a subset of the trigonal system. The carbonate ions (CO3) are arranged in a triangular planar configuration, and the manganese ions (Mn) are surrounded by six oxygen ions in an octahedral arrangement. The MnO6 octahedra and CO3 triangles are linked together to form a three-dimensional structure. Crystal twinning often is present. It is often confused with the manganese silicate, rhodonite, but is distinctly softer. Rhodochrosite is formed by the oxidation of manganese ore, and is found in South Africa, China, and the Americas. It is officially listed as one of the National symbols of Argentina.
This article lists extreme locations on Earth that hold geographical records or are otherwise known for their geophysical or meteorological superlatives. All of these locations are Earth-wide extremes; extremes of individual continents or countries are not listed.
The Mexico national football team represents Mexico in international football and is governed by the Mexican Football Federation. It competes as a member of CONCACAF.
Gold mining is the extraction of gold by mining. World gold production was 3,612 tons in 2022.
The Tradition is an event on the PGA Tour Champions. First staged 34 years ago in 1989, the PGA Tour recognizes the event as one of the five senior major golf championships. Unlike the U.S. Senior Open, Senior PGA Championship and Senior Open Championship, it is not recognized as a major by the European Senior Tour, and is not part of that tour's official schedule. It is the only senior major where the winner does not earn an exemption into a PGA Tour or European Tour event.
The Strickland River is a major river in the Western Province of Papua New Guinea. It is the longest and largest tributary of the Fly River with a total length of 824 km (512 mi) including the Lagaip River the farthest distance river source of the Strickland River. It was named after Edward Strickland, vice-president of the Geographical Society of Australasia by the New Guinea Exploration Expedition of 1885.
AngloGold Ashanti Limited is a global gold mining company, formed in 2004 by the merger of AngloGold and the Ashanti Goldfields Corporation. As of 2022, it was a global gold producer with 21 operations on four continents, listed on the New York, Johannesburg, Accra, London and Australian stock exchanges, as well as the Paris and Brussels bourses, but left the Johannesburg exchange in 2023. As of May 2023, it was the world’s fourth-largest gold miner with assets in Ghana, Australia, the US and Argentina.
In HTTP, "Referer" is an optional HTTP header field that identifies the address of the web page, from which the resource has been requested. By checking the referrer, the server providing the new web page can see where the request originated.
Darappur is a census town in the Chakdaha CD block in the Kalyani subdivision of the Nadia district in the state of West Bengal, India.
Silver mining is the extraction of silver from minerals, starting with mining. Because silver is often found in intimate combination with other metals, its extraction requires elaborate technologies. In 2008, ca. 25,900 metric tons were consumed worldwide, most of which came from mining.
Club Sportivo Independiente Rivadavia is a football club from Mendoza, Argentina. The team currently plays in Primera B Nacional, the second major league in Argentine Football league system.
Gold Mining often plays a significant role in Burkina Faso’s economy. Burkina Faso has become Africa's 4th biggest producer of gold in 2012. Production of mineral commodities is limited to cement, dolomite, gold, granite, marble, phosphate rock, pumice, other volcanic materials, and salt.
Passa Tempo is a municipality in the state of Minas Gerais in the Southeast region of Brazil.
Wheaton Precious Metals Corp. is a Canadian multinational precious metals streaming company. It produces over 26 million ounces and sells over 29 million ounces of silver mined by other companies as a by-product of their main operations.
The El Indio Gold Belt is a mineral-rich region spanning the border between Chile and Argentina that contains large quantities of gold, silver and copper. On both sides of the border the belt is located within the Andes. The El Indio mine within the district was the first modern mine in Chile to produce gold as its main product. In Chile the main precious metal containing mineral is enargite. The El Indio belt is bordered in the north by another gold-silver mining district known as the Frontera District. Rodalquilarite, alunite and poughite are some of the minerals present in the area. The deposits of the belt formed during the Late Miocene period.
Gold Rush is a reality television series that airs on Discovery and its affiliates worldwide. The series follows the placer gold mining efforts of various family-run mining companies, mostly in the Klondike region of Dawson City, Yukon, Canada, as well as in the U.S. state of Alaska. In its 12th season as of early 2021, prior seasons also included mining efforts in South America and western North America.
Pascua-Lama is an open pit mining project of gold, silver, copper and other minerals. Pascua Lama is located in the Andes mountains, in the southern reaches of Atacama Desert, straddling the border between Chile and the Argentina Northwest at an altitude of over 4,500 metres. Toronto-based Barrick Gold, the world's largest gold mining company, is developing the project. Due to its proximity to glaciers, Pascua-Lama has caused controversy and public protest in Chile, including demonstrations and petitions presented to the Chilean government. Chile has not approved the project.
The Norwegian Mining Museum is located at Kongsberg in Viken county, Norway.
Stavros Reservation is a nature reserve located in Essex, Massachusetts. The property is owned by The Trustees of Reservations through a 1952 gift and a 1955 purchase. Most of the approximately 50-acre (20 ha) reservation consists of salt marsh. The property encompasses Whites Hill, which includes fine views of the Massachusetts coast, including Crane Beach.
The Veladero mine is a gold mine in Argentina. The mine is located in the north-western part of Argentina in San Juan Province. The mine has estimated reserves of 10 million oz of gold. It is operated by Barrick Gold.The mine uses heap leach to extract gold and silver, which is a process that uses cyanide to dissolve the gold and mercury to extract it from the cyanide slurry. This mine has had at least 5 catastrophic spills i tor eh environment contaminating 5 rivers.
References
- 1 2 3 "Gualcamayo". yamana.com. 2013. Archived from the original on 2013-06-22. Retrieved 2013-07-02.
29°43′23″S68°39′03″W / 29.7231°S 68.6508°W
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