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dc.contributor.authorIwamura, S.
dc.contributor.authorTsunogae, T.
dc.contributor.authorKato, M.
dc.contributor.authorKoizumi, T.
dc.contributor.authorDunkley, Daniel
dc.date.accessioned2017-01-30T15:01:40Z
dc.date.available2017-01-30T15:01:40Z
dc.date.created2014-06-02T20:00:20Z
dc.date.issued2013
dc.date.submitted2014-06-04
dc.identifier.citationIwamura, S. and Tsunogae, T. and Kato, M. and Koizumi, T. and Dunkley, D. 2013. Petrology and phase equilibrium modeling of spinel-sapphirine-bearing mafic granulite from Akarui Point, Lützow-Holm Complex, East Antarctica: Implications for the P-T path. Journal of Mineralogical and Petrological Sciences. 108 (6): pp. 345-350.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/42726
dc.identifier.doi10.2465/jmps.130621a
dc.description.abstract

We report new petrological and P-T data for spinel-sapphirine-bearing mafic granulite from Akarui Point in the upper amphibolite- to granulite-facies transitional zone of the Lützow-Holm Complex (LHC), East Antarctica, and provide unequivocal evidence for extreme crustal metamorphism possibly associated with the collisional orogeny during the Neoproterozoic. The reaction microstructures in the rock suggest the stability of the prograde pargasite + garnet + orthopyroxene + plagioclase + hematite assemblage followed by the formation of plagioclase + orthopyroxene + spinel + sapphirine symplectite after garnet. The application of mineral equilibrium modeling on the mafic granulite in the system NCFMASHTO yields a prograde condition of 11-12 kbar and ~ 900 °C, followed by decompression to the peak stage (Pgs + Pl + Opx + Spl ± H2O) of 5-6 kbar and 900-920 °C, and subsequent cooling to less than 890 °C, possibly along a clockwise P-T path. The high-temperature and possibly ultrahigh-temperature condition observed at Akarui Point might reflect an effect of a local thermal event or the presence of an exotic crustal block within the LHC, which are essentially associated with the complex collisional evolution of this region during the assembly of Gondwana.

dc.publisherSasaki Printing & Publishing Co. Ltd
dc.subjectNeoproterozoic-Cambrian
dc.subjectPseudosection
dc.subjectNCFMASHTO system
dc.subjectEast Antarctica
dc.subjectGranulite
dc.titlePetrology and phase equilibrium modeling of spinel-sapphirine-bearing mafic granulite from Akarui Point, Lützow-Holm Complex, East Antarctica: Implications for the P-T path
dc.typeJournal Article
dcterms.dateSubmitted2014-06-03
dcterms.source.volume108
dcterms.source.startPage345
dcterms.source.endPage350
dcterms.source.issn1345-6296
dcterms.source.titleJournal of Mineralogical and Petrological Sciences
curtin.digitool.pid199342
curtin.pubStatusPublished
curtin.department
curtin.identifier.scriptidPUB-SE-DAG-GG-77771
curtin.accessStatusFulltext not available


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