http://www.cnr.it/ontology/cnr/individuo/prodotto/ID29338
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)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- 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 ICPMS 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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