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U-Th-Pb zircon and monazite geochronology of Western Province gneissic rocks, central-south Westland, New Zealand

Hiess, Joe; Rattenbury, M; Ireland, Trevor

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Ion-microprobe (Sensitive High Resolution Ion MicroProbe or SHRIMP) zircon and monazite U-Th-Pb geochronology of amphibolite-facies orthogneiss and paragneiss units, mostly from the Fraser and Granite Hill Complexes of Westland, New Zealand, has constrained the ages of protolith rocks and metamorphic overprints. Paragneiss zircon (6 samples, 175 analyses) comprise detrital grains of Paleozoic to Archean age and match patterns from metasedimentary (Ordovician) Greenland Group rocks of the...[Show more]

dc.contributor.authorHiess, Joe
dc.contributor.authorRattenbury, M
dc.contributor.authorIreland, Trevor
dc.date.accessioned2015-12-10T23:26:38Z
dc.identifier.issn0028-8306
dc.identifier.urihttp://hdl.handle.net/1885/67851
dc.description.abstractIon-microprobe (Sensitive High Resolution Ion MicroProbe or SHRIMP) zircon and monazite U-Th-Pb geochronology of amphibolite-facies orthogneiss and paragneiss units, mostly from the Fraser and Granite Hill Complexes of Westland, New Zealand, has constrained the ages of protolith rocks and metamorphic overprints. Paragneiss zircon (6 samples, 175 analyses) comprise detrital grains of Paleozoic to Archean age and match patterns from metasedimentary (Ordovician) Greenland Group rocks of the Western Province, which are characteristic of early Paleozoic flysch units around the southwest Pacific margin of Gondwana. Orthogneiss zircon (9 samples, 138 analyses) reflect intense Devonian and Cretaceous magmatism associated with emplacement of the Karamea-Paparoa and Hohonu Batholiths within the Western Province. Both paragneiss and orthogneiss monazite analyses (10 samples, 116 analyses) are dominated by Devonian and Cretaceous ages, reflecting thermal pulses related to regional and localised granitoid intrusions. These results indicate that the Fraser and Granite Hill Complex gneisses are metamorphosed parts of the Western Province Buller Terrane with Karamea-Paparoa and Hohonu Batholith intrusive components.
dc.publisherSir Publishing
dc.sourceNew Zealand Journal of Geology and Geophysics
dc.subjectKeywords: amphibolite facies; emplacement; geochronology; gneiss; Gondwana; ion microprobe; magmatism; monazite; Ordovician; orthogneiss; Paleozoic; SHRIMP dating; zircon; New Zealand; South Island; West Coast [South Island] Fraser complex; Granite Hill Complex; Monazite; Orthogneiss; Paragneiss; SHRIMP; U-Th-Pb; West coast; Zircon
dc.titleU-Th-Pb zircon and monazite geochronology of Western Province gneissic rocks, central-south Westland, New Zealand
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume53
dc.date.issued2010
local.identifier.absfor040303 - Geochronology
local.identifier.ariespublicationf2965xPUB1545
local.type.statusPublished Version
local.contributor.affiliationHiess, Joe, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationIreland, Trevor, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationRattenbury, M, GNS Science
local.description.embargo2037-12-31
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage241
local.bibliographicCitation.lastpage269
local.identifier.doi10.1080/00288306.2010.495450
dc.date.updated2016-02-24T08:15:11Z
local.identifier.scopusID2-s2.0-79955733726
local.identifier.thomsonID000286823500002
CollectionsANU Research Publications

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