The chromite-bearing ultramafic-mafic complexes of the Vizcaíno Peninsula (Baja California Sur, Mexico), re-visited for platinum-group minerals

Luis A. Jimenez-Galindo*, Jose Gonzalez-Jimenez, Antoni Camprubi, Michelangelo Martini, Elena Centeno-Garcia, Joaquin A. Proenza, Bill Griffin, Sue O'Reilly, Norman Pearson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

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.

Original languageEnglish
Title of host publicationMineral deposit research for a high-tech world
Subtitle of host publicationproceedings of the 12th biennial SGA meeting
EditorsErik Jonsson
Place of PublicationSweden
PublisherSGU-SVERIGES GEOLOGISKA UNDERSOKNING-GEOLOGY SURVEY SWEDEN
Pages1017-1019
Number of pages3
Volume3
ISBN (Print)9789174032079
Publication statusPublished - 2013
Event12th Biennial SGA Meeting: Mineral Deposit Research for a High-Tech World - Uppsala, Sweden
Duration: 12 Aug 201315 Aug 2013

Conference

Conference12th Biennial SGA Meeting
CountrySweden
CityUppsala
Period12/08/1315/08/13

Keywords

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

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