Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites

Gonzalez-Jimenez J. M., Griffin W. L., Proenza J. A., Gervilla F., O'Reilly S. Y., AKBULUT M., ...Daha Fazla

LITHOS, cilt.189, ss.140-158, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 189
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.lithos.2013.09.008
  • Dergi Adı: LITHOS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.140-158
  • Anahtar Kelimeler: Ophiolitic chromite, Chromitite origin, Platinum group elements in ophiolites, Mafic magma mixing, Chromite trace elements, Mantle sulfide Re-Os isotopes, PLATINUM-GROUP ELEMENTS, NORTHERN OMAN OPHIOLITE, DUNITE-HARZBURGITE COMPLEXES, LITHOSPHERIC MANTLE BENEATH, CHROMIAN SPINEL COMPOSITION, PARTIALLY MOLTEN MANTLE, MELT-ROCK INTERACTION, RE-OS SYSTEMATICS, PODIFORM CHROMITITES, GROUP MINERALS
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A review of previous work relevant to the formation of concentrations of chromite in peridotites from ophiolitic (s.l.) sequences highlights some of the key problems in understanding the complex processes involved. This review forms the basis for chromitite-genesis models that integrate new geochemical data with petrologic, field and microstructural observations, and for a re-interpretation of previous data and concepts. The geochemical data include major- and trace-element contents of chromite and coexisting phases and especially the nature and Os-isotope compositions of platinum-group minerals (PGM) and base-metal sulfides (BMS); the PGM data in particular provide new insights into chromitite formation.