Traore D., Beauvais Anicet, Auge T., Chabaux F., Parisot J.C., Cathelineau M., Peiffert C., Colin Fabrice. (2006). Platinum and palladium mobility in supergene environment : the residual origin of the Pirogues River mineralization, New Caledonia. Journal of Geochemical Exploration, 88 ((1-3) Special Iss. SI), p. 350-354.
Titre du document
Platinum and palladium mobility in supergene environment : the residual origin of the Pirogues River mineralization, New Caledonia
Traore D., Beauvais Anicet, Auge T., Chabaux F., Parisot J.C., Cathelineau M., Peiffert C., Colin Fabrice
Source
Journal of Geochemical Exploration, 2006,
88 ((1-3) Special Iss. SI), p. 350-354
Eluvial concentration of platinum-group minerals (PGM) has developed in the south of New Caledonia, from the weathering of a mafic and ultramafic cumulate. The platinum/palladium (Pt/Pd) ratio evolution from the bottom to the top of the weathering profile indicates a chemical mobilization of Pd in supergene environment. The examination by scanning electron microscopy of the residual PGM collected in the weathering profile and their chemical characterization by electronic microprobe show a preservation of the structure and chemical signature (in the core of the grains) of the fresh PGM. This clearly demonstrates that the PGM studied here are residual and are affected by dissolution process. (c) 2005 Elsevier B.V. All rights reserved.
