Bauxite

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Published on December 8, 2021 1:44:12 AM ● Video Link: https://www.youtube.com/watch?v=zS3oQjbjDAM

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Bauxite, by Wikipedia https://en.wikipedia.org/wiki?curid=3760 / CC BY SA 3.0

#Sedimentary_rocks
#Aluminium_minerals
#Bauxite_mining
#Regolith
#Weathering
Bauxite with US penny for comparison QEMSCAN mineral maps of bauxite ore-forming pisoliths Bauxite is a sedimentary rock with a relatively high aluminium content.
It is the world's main source of aluminium and gallium.
Bauxite consists mostly of the aluminium minerals gibbsite （Al（OH）3）, boehmite （γ-AlO（OH）） and diaspore （α-AlO（OH））, mixed with the two iron oxides goethite （FeO（OH）） and haematite （Fe2O3）,
the aluminium clay mineral kaolinite （Al2Si2O5（OH）4） and small amounts of anatase （TiO2） and ilmenite （FeTiO3 or FeO.TiO2）.
Bauxite appears dull in luster and is reddish-brown, white, or tan in color.
In 1821 the French geologist Pierre Berthier discovered bauxite near the village of Les Baux in Provence, southern France.
Bauxite with core of unweathered rock Numerous classification schemes have been proposed for bauxite but, as of 1982, there was no consensus.
Vadász （1951） distinguished lateritic bauxites （silicate bauxites） from karst bauxite ores （carbonate bauxites）: In the case of Jamaica, recent analysis of the soils showed elevated levels of cadmium,
suggesting that the bauxite originates from recent Miocene ash deposits from episodes of significant volcanism in Central America.
World bauxite production in 2005 One of the world's largest bauxite mines in Weipa, Australia Australia is the largest producer of bauxite, followed by China.
Increased aluminium recycling, which has the advantage of lowering the cost in electric power in producing aluminium, will considerably extend the world's bauxite reserves.
In November 2010, Nguyen Tan Dung, the prime minister of Vietnam, announced that Vietnam's bauxite reserves might total 11,000 Mt （11 trillion kg）; this would be the largest in the world.
Bauxite being loaded at Cabo Rojo, Dominican Republic, to be shipped elsewhere for processing; 2007 Play media Bauxit...