Boksit
Boksit utawa bauksit, iku wiji alumunium sing paling wigati. Dat iki dumadi akèh-akèhé saka bahan logam gibbsite Al(OH)3, boehmite γ-AlO(OH), lan alumunium dioksida hidroksida (diaspore) α-AlO(OH), bebarengan karo oksida wesi goethite lan hematite, lempung mineral kaolinite lan sethithik anatase TiO2. Dat iki dijenengaké saka jeneng désa Les Baux ing Prancis kidul, papan tinemu sepisanan dat iki ing taun 1821 déning geologis Pierre Berthier.
Pangasil boksit
[besut | besut sumber]Tabel ig ngisor iki nagara diurut miturut akèhé cadhangan boksit.
| Negara | Prodhuksi tambang | Cadhangan | Dhasar cadhangan | |
|---|---|---|---|---|
| 2007 | 2008 | |||
 Guinea |
18,000 | 18,000 | 7,400,000 | 8,600,000 |
 Australia |
62,400 | 63,000 | 5,800,000 | 7,900,000 |
 Vietnam |
30 | 30 | 2,100,000 | 5,400,000 |
 Jamaica |
14,600 | 15,000 | 2,000,000 | 2,500,000 |
 Brasil |
24,800 | 25,000 | 1,900,000 | 2,500,000 |
 Guyana |
1,600 | 1,600 | 700,000 | 900,000 |
 India |
19,200 | 20,000 | 770,000 | 1,400,000 |
 Cina |
30,000 | 32,000 | 700,000 | 2,300,000 |
 Greece |
2,220 | 2,200 | 600,000 | 650,000 |
 Suriname |
4,900 | 4,500 | 580,000 | 600,000 |
 Kazakhstan |
4,800 | 4,800 | 360,000 | 450,000 |
 Venezuela |
5,900 | 5,900 | 320,000 | 350,000 |
 Ruslan |
6,400 | 6,400 | 200,000 | 250,000 |
 Amérikah Sarékat |
NA | NA | 20,000 | 40,000 |
| Negara liya | 7,150 | 6,800 | 3,200,000 | 3,800,000 |
| Total donya (diganepna) | 202,000 | 205,000 | 27,000,000 | 38,000,000 |
Sumber: U.S. Geological Survey, Mineral Commodity Summaries, January 2009 Cithakan:Industry country lists
Rujukan
[besut | besut sumber]- Bardossy, G. (1982): Karst Bauxites. Bauxite deposits on carbonate rocks. Elsevier Sci. Publ. 441 p.
- Bardossy, G. and Aleva, G.J.J. (1990): Lateritic Bauxites. Developments in Economic Geology 27, Elsevier Sci. Publ. 624 p. ISBN 0-444-988
Pranala njaba
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