Peculiarities of some mafic-ultramafic- and ultramafic-hosted massive sulfide deposits from the Main Uralian Fault Zone, southern Urals (Articolo in rivista)

Type
Label
  • Peculiarities of some mafic-ultramafic- and ultramafic-hosted massive sulfide deposits from the Main Uralian Fault Zone, southern Urals (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.oregeorev.2006.05.010 (literal)
Alternative label
  • Nimis P.; Zaykov V.V.; Omenetto P.; Melekestseva I.Yu.; Tesalina S.G.; Orgeval J.-J. (2008)
    Peculiarities of some mafic-ultramafic- and ultramafic-hosted massive sulfide deposits from the Main Uralian Fault Zone, southern Urals
    in Ore geology reviews
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Nimis P.; Zaykov V.V.; Omenetto P.; Melekestseva I.Yu.; Tesalina S.G.; Orgeval J.-J. (literal)
Pagina inizio
  • 49 (literal)
Pagina fine
  • 69 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 33 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 21 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Geoscienze, Università di Padova, Corso Garibaldi 37, 35137 Padova, Italy Kroseven Services s.a.s., Via Mentana 16A, 35100 Padova, Italy Institute of Mineralogy, Urals Branch of RAS, 456317 Miass, Russia Institut de Physique du Globe de Paris, 4 Place Jussieu, 75005 Paris, France BRGM, BP 6009, 45060 Orléans cedex 2, France (literal)
Titolo
  • Peculiarities of some mafic-ultramafic- and ultramafic-hosted massive sulfide deposits from the Main Uralian Fault Zone, southern Urals (literal)
Abstract
  • Some Cu-rich, mafic-ultramafic- and ultramafic-hosted massive sulfide deposits from the southern segment of the Main Uralian Fault Zone (Ivanovka and Ishkinino deposits, southern Urals) show unusual characteristics. Their major features include: (i) relatively high Co (Ni, Au), very low Zn and negligible Pb grades; (ii) a pyrrhotite-dominated mineralization, locally characterized by the presence of open-latticework aggregates of lamellar pyrrhotite with Mg-saponite±Mg-chlorite and carbonate matrix; (iii) hydrothermal alteration of ultramafic host rocks into talc±carbonate±quartz±chlorite and of mafic host rocks into chloritites; (iv) the presence of clastic facies with reworked sulfide and ultramafic or mafic components; (v) the widespread occurrence of sulfide-associated chromite; (vi) the specific mineralogy of Co, Ni, Fe and As, including sulfoarsenides, mono- and diarsenides, and Co-rich pentlandite and pyrite; (vii) the supra-subduction-zone geochemical signature of the host serpentinites and volcanic rocks. Although some of these features have been separately reported in certain modern ocean-seafloor and ophiolite-hosted fossil deposits, a true equivalent has yet to be found. Based on recognized partial analogies with a few modern seafloor examples, the arc tholeiitic-boninitic geochemical signature of sulfide-associated volcanic rocks and the highly refractory compositions of sulfide-hosted chromite relicts, the studied deposits are believed to have formed by seafloor-subseafloor hydrothermal processes in an oceanic island arc setting. Possible tectonostratigraphic correlation of sulfide-associated units with infant, non-accretionary arc volcanic units of the adjacent Magnitogorsk oceanic island-arc system suggests formation of the studied deposits during the earliest stages of Devonian subduction-related volcanism. (literal)
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