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Título del libro: Mineral Deposit Research For A High-Tech World, Vols. 1-4
Título del capítulo: The chromite-bearing ultramafic-mafic complexes of the Vizcaino Peninsula (Baja California Sur, Mexico), re-visited for platinum-group minerals

Autores UNAM:
ANTONI CAMPRUBI CANO; MICHELANGELO MARTINI; ELENA CENTENO GARCIA;
Autores externos:

Idioma:

Año de publicación:
2013
Palabras clave:

Ultramafic-mafic complex; Platinum-group elements; chromitite; Vizcaino; sulfur saturation


Resumen:

The mafic-ultramafic complexes of the Vizcaino Peninsula, Baja California Sur, northwestern Mexico contain chromitite bodies hosted in duniteharzburgite. The platinum-group mineralisation in the chromitites is dominated by Ru-, Os-, and Ir-rich minerals. They include members of the laurite-erlichmanite solid solution series, irarsite and Os-Ir alloys associated with Ni-Cu sulfides, all occurring as inclusions in larger chromite crystals or in fractures across them. The fractionation of PGE in the form of PGM is discussed here in terms of a dynamic environment characterized by the turbulent mixing/mingling of batches of melts with distinct PGE compositions, within dunitic channels formed as a result of mantle-melt reactions.


Entidades citadas de la UNAM: