Accéder directement au contenu Accéder directement à la navigation
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.
Type de document :
Communication dans un congrès
Liste complète des métadonnées

https://hal-brgm.archives-ouvertes.fr/hal-01020773
Contributeur : Thierry Augé <>
Soumis le : mardi 8 juillet 2014 - 15:11:45
Dernière modification le : lundi 8 janvier 2018 - 13:50:01
Archivage à long terme le : : mercredi 8 octobre 2014 - 14:00:14

Fichier

NC_final_19_03_14_pdf.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : hal-01020773, version 1

Collections

Citation

Thierry Augé, Pierre Maurizot, Laurent Bailly. Magmatic and supergene evolution of the unconventional pirogues Pt mineralization in the New Caledonia ophiolite. 12th International Platinum Symposium, Jul 2014, Yekaterinburg, Russia. ⟨hal-01020773⟩

Partager

Métriques

Consultations de la notice

175

Téléchargements de fichiers

189