/Image996.gif) Fig. 1. Localization of large bauxite districts and provinces with large and superlarge deposits relative to continental tectonic structures of the Earth. (1) Alpine folded complexes; (2) Cimmerian folded complexes; (3) plate complexes of young (epi-Hercynian) platforms; (4) Hercynian folded complexes (including shields and anteclises of young platforms); (5) Caledonian folded complexes (including shields and anteclises of young platforms); (6) plate complexes of ancient platforms; (7) Baikalian folded complexes (including shields and anteclises of young platforms); (8) Proterozoic and younger folded complexes (including shields and anteclises of young platforms); (9-11) genetically different bauxite provinces, districts, and deposits in aluminosilicate rocks: (9) residual (lateritic), (10) sedimentary, (11) in karstified carbonate rocks (karst); (12) eastern boundary of the activated segment of the Asian continent (a) and boundaries of island-arc zones (b). Superlarge bauxite ore provinces, districts, and deposits: (1) Caribbean province (Jamaica Island): Saint Ann, Cockpit Country,Essex Valley, and Manchester deposits); (2-5) deposits of the Guiana province: (2) Pijiguaos, (3) Trombetas, (4) Onverdacht,(5) Paragominas; (6-7) West African province: (6) Boque district (Dian Dian deposit), (7) Boque district (Sangaredi deposit);(8) Fria district (Fria deposit); (9) Pita Labe district (Bantinel deposit); (10) Tuge district (Pontiolo deposit); (11) Cameroon subprovince(Minim Martap deposit); (12) Mediterranean province (Brignoles deposit, France; Lika deposit, Bosnia; Niksic deposit, Montenegro);(13-15) East European province: (13) Belgorod district (Vislovka deposit), (14) North Onega district (Iksa and Plesetsk deposits),(15) Middle Timan district (Vezhayu-Voryvka deposits); (16) North Ural district (Cheremukhovo, Kal’ya, and Krasnaya Shapochka deposits); (17) West Turgai district (Krasnyi Oktyabr deposit; (18) Hindustan province (Panchpatmali and other deposits); (19) Chinese province (Yunnan, Guichzhou, and Shandung deposits); (20) Indochinese province (Tuy Duc, Bao Loc, and other deposits);(21-24) Australian province: bauxite ore districts and deposits: (21) Darling, (22) Kimberley, (23) Gove, (24) Weipa. /Image997.gif) Fig. 2. Evolution of bauxite formation scale in the Phanerozoic depending on climate variations. Modified after (Mikhailov, 1975). (I) Thermal regime: (C) cold periods, (H) hot periods; (II) humidity: (D) dry periods, (H) humid periods; (III) style of tectonic motions in the Earth’s surface: (R) regressive stages, (T) transgressive stages; (IV) approximate distribution of reserves of various bauxites in different geological epochs (columns). (1-3) Major genetic bauxite groups: (1) lateritic, (2) sedimentary, (3) karstic. Bogatyrev et al.(2009)による『Formation conditions and regularities of the distribution of large and superlarge bauxite deposits』から |
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