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dc.contributor.authorDutch, R.
dc.contributor.authorHand, M.
dc.contributor.authorKinny, Peter
dc.date.accessioned2017-01-30T13:45:39Z
dc.date.available2017-01-30T13:45:39Z
dc.date.created2008-11-13T05:14:50Z
dc.date.issued2008
dc.identifier.citationDutch, Rian and Hand, Martin and Kinny, Peter. 2008. High-grade Paleoproterozoic reworking in the southeastern Gawler Craton, South Australia. Australian Journal of Earth Sciences 55: 1063-1081.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/34784
dc.identifier.doi10.1080/08120090802266550
dc.description.abstract

SHRIMP U-Pb geochronology and monazite EPMA chemical dating from the southeast Gawler Craton has constrained the timing of high-grade reworking of the Early Paleoproterozoic (ca 2450 Ma) Sleaford Complex during the Paleoproterozoic Kimban Orogeny. SHRIMP monazite geochronology from mylonitic and migmatitic high-strain zones that deform the ca 2450 Ma peraluminous granites indicates that they formed at 1725 ± 2 and 1721 ± 3 Ma. These are within error of EPMA monazite chemical ages of the same high-strain zones which range between 1736 and 1691 Ma. SHRIMP dating of titanite from peak metamorphic (1000 MPa at 730°C) mafic assemblages gives ages of 1712 ± 8 and 1708 ± 12 Ma. The post-peak evolution is constrained by partial to complete replacement of garnet-clinopyroxene-bearing mafic assemblages by hornblende-plagioclase symplectites, which record conditions of ∼600 MPa at 700°C, implying a steeply decompressional exhumation path. The timing of Paleoproterozoic reworking corresponds to widespread deformation along the eastern margin of the Gawler Craton and the development of the Kalinjala Shear Zone.

dc.publisherTaylor & Francis Ltd
dc.subjectSHRIMP
dc.subjectEPMA
dc.subjectreworking
dc.subjectKimban Orogen
dc.subjectGawler Craton
dc.subjectmonazite
dc.titleHigh-grade Paleoproterozoic reworking in the southeastern Gawler Craton, South Australia
dc.typeJournal Article
dcterms.source.volume55
dcterms.source.number8
dcterms.source.startPage1063
dcterms.source.endPage1081
dcterms.source.issn0812-0099
dcterms.source.titleAustralian Journal of Earth Sciences
curtin.note

This is an Author's Accepted Manuscript of an article published in the Australian Journal of Earth Sciences (30 Apr 2009), copyright Taylor & Francis, available online at: <a href="http://www.tandfonline.com/doi/abs/10.1080/08120090802266550">http://www.tandfonline.com/doi/abs/10.1080/08120090802266550</a>

curtin.accessStatusOpen access
curtin.facultyDepartment of Applied Geology
curtin.facultyScience and Engineering


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