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dc.contributor.authorMcCormack, K.
dc.contributor.authorGee, M.
dc.contributor.authorMcNaughton, Neal
dc.contributor.authorSmith, Richard
dc.contributor.authorFletcher, Ian
dc.date.accessioned2017-01-30T10:40:10Z
dc.date.available2017-01-30T10:40:10Z
dc.date.created2010-02-09T20:02:03Z
dc.date.issued2009
dc.identifier.citationMcCormack, Kenneth and Gee, M.A. Mary and McNaughton, Neal and Smith, Richard and Fletcher, Ian. 2009. U-Pb dating of magmatic and xenocryst zircons from Mangakino ignimbrites and their correlation with detrital zircons from the Torlesse metasediments, Taupo Volcanic Zone, New Zealand. Journal of Volcanology and Geothermal Research. 183 (1-2): pp. 97-111.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/4579
dc.identifier.doi10.1016/j.jvolgeores.2009.03.005
dc.description.abstract

Mangakino ignimbrites are a sequence of voluminous eruptive units in the rhyolitic Mangakino Volcanic Centre (MVC) caldera complex, Taupo Volcanic Zone, New Zealand. U-Pb dating of 113 zircons extracted from four Mangakino ignimbrites revealsmagmatic and xenocrystic zircons. Magmatic zircon ages from three ignimbrites are slightly older than K/Ar and 40Ar/39Ar ages. Magmatic zircon age-spectra are tightly clustered and support a simple crystallisation history for these three ignimbrites. It is possible that the assimilation of zircon antecrysts leads to magmatic zircon spectra for the Ahuroa ignimbrite being >or=70 ka older than the 40Ar/39Ar age. Xenocrystic zircon age spectra correlate with spectra of detrital zircons from the underlying Mesozoic Torlesse metasediments. Our data are consistent with significant assimilation of metasediments and the incorporation of zircon prior to eruption. Systematic variations in the age spectra of xenocrystic zircons in successive Mangakinoignimbrites may be related to the structural development of the North Island, New Zealand.

dc.publisherElsevier
dc.subjectTaupo Volcanic Zone
dc.subjectSHRIMP
dc.subjectMangakino
dc.subjectU-Pb
dc.titleU-Pb dating of magmatic and xenocryst zircons from Mangakino ignimbrites and their correlation with detrital zircons from the Torlesse metasediments, Taupo Volcanic Zone, New Zealand
dc.typeJournal Article
dcterms.source.volume183
dcterms.source.startPage97
dcterms.source.endPage111
dcterms.source.issn0377-0273
dcterms.source.titleJournal of Volcanology and Geothermal Research
curtin.note

The link to the journal’s home page is: http://www.elsevier.com/wps/find/journaldescription.cws_home/622273/description#description. Copyright © 2009 Elsevier B.V. All rights reserved

curtin.departmentJohn de Laeter Centre for Mass Spectrometry (COE)
curtin.accessStatusFulltext not available
curtin.facultyScience and Engineering


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