Mantle amphibole trace-element and isotopic signatures trace multiple metasomatic episodes in lithospheric mantle, western Victoria, Australia. (Articolo in rivista)

Type
Label
  • Mantle amphibole trace-element and isotopic signatures trace multiple metasomatic episodes in lithospheric mantle, western Victoria, Australia. (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.lithos.2003.12.017 (literal)
Alternative label
  • Powell, W.; Zhang M.; O'Reilly S.Y.; Tiepolo M. (2004)
    Mantle amphibole trace-element and isotopic signatures trace multiple metasomatic episodes in lithospheric mantle, western Victoria, Australia.
    in Lithos (Oslo. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Powell, W.; Zhang M.; O'Reilly S.Y.; Tiepolo M. (literal)
Pagina inizio
  • 141 (literal)
Pagina fine
  • 171 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 75 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Macquarie Univ, Dept Earth & Planetary Sci, ARC Natl Key Ctr, GEMOC, Sydney, NSW 2109, Australia CNR, Ist Geosci & Georisorse Pavia, I-27100 Pavia, Italy (literal)
Titolo
  • Mantle amphibole trace-element and isotopic signatures trace multiple metasomatic episodes in lithospheric mantle, western Victoria, Australia. (literal)
Abstract
  • Peridotite xenoliths from western Victoria, Australia, contain varying proportions of amphibole (±apatite). The xenoliths also exhibit varying degrees of metasomatic enrichment as indicated by the rare-earth element (REE) patterns of clinopyroxene and amphibole analysed in situ by laser-ablation microprobe ICP–MS and by whole-rock trace-element patterns. Trace-element patterns allow the samples to be divided into three groups. Group A is characterised by flat REE patterns for whole-rock, clinopyroxene and amphibole, and small negative or absent high-field-strength element (HFSE) anomalies; Group B features high levels of light-REE enrichment, pronounced negative HFSE anomalies and low Ti/Eu in whole-rock trace-element patterns; and Group C shows positive HFSE anomalies in whole-rock patterns. The different trace-element patterns are consistent with metasomatism by different agents or combinations of agents, which have acted upon the already modally metasomatised sub-continental lithospheric mantle (SCLM) beneath western Victoria. Geochemical signatures suggest that Group A samples have undergone silicate melt metasomatism, Group B samples have undergone metasomatism by a carbonate-rich or carbonatitic fluid and Group C samples may record metasomatism by a fractionated silicate fluid with hydrous component. (literal)
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