...Eliana Satiko Mano; Laurent Caner; Sabine Petit; Arthur Pinto Chaves; André Sampaio Mexias Abstract Nickel-lateritic ore is the most common source of nickel in Brazil. The Niquelândia deposit, located in State of Goias, is one of the most famous deposits due to the large amounts of nickel...

...Cesar Ferreira Filho; Anthony J. Naldrett; Mohammad Asif Abstract The study of the distribution of PGE, Au, Ni, Cu, Co, and S in the Proterozoic Niquelandia mafic-ultramafic layered intrusion (Brazil), 65 km long and 35 km wide, shows the existence of two distinct stratigraphic zones of contrasting...

...F. Colin; Daniel Nahon; Jean-Jacques Trescases; A. J. Melfi Abstract Two typical lateritic weathering profiles (Jacuba and Angiquinho) from the Niquelandia Ni deposits, Brazil, were studied in order to establish the petrological relationship between the supergene Ni products and the parental...

... conditions, i.e. during soil genesis. Ultramafic soils from Niquelandia (Goias State, Brazil) are rich in Cr, which is mainly found associated with the reducible fraction, i.e. well crystallized Fe oxides, and the residual one, i.e. spinel ( Garnier et al. , 2006 ). The study was carried out...

...) the exposed Archean/Paleoproterozoic basement (represented by granite-gneiss rocks, metasediments, and paragneisses of the Ticunzal Formation and peraluminous granitogenesis of the Aurumina Suite); (3) mafic-ultramafic complexes of Barro Alto, Canabrava, and Niquelândia; (4) volcano-sedimentary sequences...

... Conference 1975, Mexico ( S.W. Bailey , editor), Applied Publishing , Illinois, USA . Bosio N.J. , Hurst V.J. & Smith R.L. ( 1975 ) Nickeliferous nontronite, a 15 Å garnierite at Niquelandia, Goias, Brazil . Clays and Clay Minerals , 23 , 400 – 403 . Brigatti...

... weathering of the Proterozoic massifs has produced the world-class Niquelândia and Barro Alto Ni deposits ( Colin et al., 1990 ; de Oliveira et al., 1992 ). Fig. 2. Schematic section of the Santa Fé laterite profile, based on the considered drill cores and geochemical logs, showing the average...

...Figure 4. Cross sections of six pre-Rodinian ophiolites. (A) Payson ophiolite (after Dann, 1991 ). (B) Jormua complex (after Peltonen et al., 1996 ). (C) Chewore ophiolite (after Oliver et al., 1998 ). (D) Purtuniq ophiolite (after Scott et al., 1992 ). (E) Niquelandia complex (after Ferreira...

... sequences of Niquelândia and Barro Alto Complexes, Central Brazil . Revista Brasileira de Geociências , 37 , 70 – 75 . Dangic A. ( 1985 ) Kaolinization of bauxite: a study in the Vlasenica Bauxite area, Yugoslavia. I. Alteration of matrix . Clays and Clay Minerals , 33 , 517 – 524...

... la Societé Géologique de la France , 17 , 105 – 160 . Colin , F. , Noack , Y. , Trescazes , J.-J. and Nahon , D. ( 1985 ) L’altération lateritiques debutante des pyroxenites de Jacuba, Niquelandia, Brésil . Clay Minerals , 20 , 93 – 113 . Colin , F. , Nahon...

..., Australia (Marlborough), Tanzania (Haneti), India (Sukinda) and Brazil (Niquelandia, Barro Alto), developed over dunitic units of komatiites, ophiolites and layered complexes. Similar silicification is reported over weathered kimberlites in Namibia and Tanzania (Gregory & Janse...

...): control by magmatic and hydrothermal processes . Mineralogy and Petrology , 86 , 159 – 188 . Garuti G. Zaccarini F. Proenza J.A. Thalhammer O.A.R. Angeli N. ( 2012 ) Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goiás, Brazil...

... reviewer for useful suggestions. References Bosio , N.J. , Hurst , V.J. and Smith , R.L. (1975) Nickeliferous nontronite, A 15°A garnierite, at Niquelandia, Goias, Brazil . Clay & Clay Mineral ., v. 23 , pp. 400 – 403 . Brand , N.W. , Butt , C.R.M. and Ellias...

... Iles ( Djon & Barnes 2012 ), and Wellgreen in Canada ( Barkov et al. 2002 ); Jinchuan ( Yang et al. 1992 ), Jinbaoshan ( Wang et al. 2008 ), and Emeishan in China ( Zhu et al. 2010 ); Las Aguilas in Argentina ( Gervilla et al. 1997 , Mogessie et al. 2000 ); Niquelandia in Brazil...

... , 159 – 188 . Garuti G. Zaccarini F. Proenza J.A. Thalhammer O.A.R. Angeli N. ( 2012 ) Platinum-group minerals in chromitites of the Niquelândia layered intrusion (Central Goias, Brazil): Their magmatic origin and low-temperature reworking during serpentinization...

.... Ferrario , A. , and Garuti , G. , 1987 , Platinum-group minerals in chromite-rich horizons of the Niquelandia Complex (Central Goias, Brazil) : in Prichard , H.M. , et al. , eds., Geo-platinum 87 : London, New York , Elsevier Applied Science , pp. 261 ߝ 272 . Grigsby , J.D...