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https://hdl.handle.net/2440/52155
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dc.contributor.author | Dutch, R. | - |
dc.contributor.author | Hand, M. | - |
dc.contributor.author | Kinny, P. | - |
dc.date.issued | 2008 | - |
dc.identifier.citation | Australian Journal of Earth Sciences, 2008; 55(8):1063-1081 | - |
dc.identifier.issn | 0812-0099 | - |
dc.identifier.issn | 1440-0952 | - |
dc.identifier.uri | http://hdl.handle.net/2440/52155 | - |
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.description.statementofresponsibility | R. Dutch, M. Hand, P. D. Kinny | - |
dc.language.iso | en | - |
dc.publisher | Taylor & Francis | - |
dc.rights | © 2008 Geological Society of Australia | - |
dc.source.uri | http://dx.doi.org/10.1080/08120090802266550 | - |
dc.subject | EPMA | - |
dc.subject | Gawler Craton | - |
dc.subject | Kimban Orogen | - |
dc.subject | monazite | - |
dc.subject | reworking | - |
dc.subject | SHRIMP | - |
dc.title | High-grade Paleoproterozoic reworking in the southeastern Gawler Craton, South Australia | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1080/08120090802266550 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/LP0454301 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Hand, M. [0000-0003-3743-9706] | - |
Appears in Collections: | Aurora harvest Environment Institute publications Geology & Geophysics publications |
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