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Communication dans un congrès
Magmatic and supergene evolution of the unconventional pirogues Pt mineralization in the New Caledonia ophiolite
Abstract : The New Caledonia ophiolite presents an unconventional Pt-Cr mineralization, located at the base of a magma chamber, itself presenting specific differences compared to the other cumulate sequences of the ophiolite. The primary mineralization and its magmatic environment are presented. The strong weathering having affected the mineralized zone has provoked a decoupling between the Cr and the Pt mineralization, with dissolution of the Pt minerals and their redistribution in the profile owing to heterogeneities in the porosity of the weathered profile. Moreover, weathering conditions having affected the PGM have locally provoked the formation of oxygen-bearing Pt-Fe grains according to a mechanism that will be proposed.
https://hal-brgm.archives-ouvertes.fr/hal-01020773
Contributeur : Thierry Augé Connectez-vous pour contacter le contributeur
Soumis le : mardi 8 juillet 2014 - 15:11:45
Dernière modification le : lundi 21 mars 2022 - 16:44:04
Archivage à long terme le : : mercredi 8 octobre 2014 - 14:00:14
Contributeur : Thierry Augé Connectez-vous pour contacter le contributeur
Soumis le : mardi 8 juillet 2014 - 15:11:45
Dernière modification le : lundi 21 mars 2022 - 16:44:04
Archivage à long terme le : : mercredi 8 octobre 2014 - 14:00:14
Fichier
NC_final_19_03_14_pdf.pdf
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