Please use this identifier to cite or link to this item:
Type: Thesis
Title: Zircon Lu-Hf constraints on recently proposed models for the tectonic assembly of Proterozoic central Australia
Author: Thomas, C. M.
Issue Date: 2012
School/Discipline: School of Physical Sciences
Abstract: The Arunta region, central Australia, is interpreted to record evidence for the complex evolution and growth of the Australian continent during the Paleoproterozoic and Mesoproterozoic. The Warumpi Province, in the southern Arunta region, has been proposed to be an exotic terrain that has accreted to the more northerly Aileron Province in the North Australian Craton during the ca1640 Ma Liebig Orogeny. The Casey Inlier has been identified to contain the boundary between the Aileron and Warumpi Provinces. U-Pb dating indicates ages of ca1652-1670 Ma granites to be the Warumpi Province and the ca1756-1774 Ma granites to be the Aileron Province. New Lu-Hf zircon analysis undertaken in this study revealed that the source regions of both provinces are isotopically indistinguishable. U-Pb and Lu-Hf analysis of detrital zircon in a quartzite cover sequence provides a maximum depositional age of ca1311 Ma and an isotopic signature that is characteristic of the Musgrave Province. This suggests that the Arunta region was proximal at this time. Field observations indicate a pervasive NNW-SSE strike fabric with east side up shear dated at ca 1730 Ma age, with a later west side up shear fabric attributed to be ca 1140 Ma shear fabric. The data obtained in this study combined within previous evidence for shared histories indicate the Warumpi Province was not exotic to the Aileron Province and it is most unlikely that a suturing event occurred at ca 1640 Ma.
Dissertation Note: Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2012
Where: Arunta Block, central Australia
Keywords: Honours; Geology; Aileron; Warumpi; Casey Inlier; Lu-Hf; U-Pb; zircon
Description: This item is only available electronically.
Provenance: This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the author of this thesis and do not wish it to be made publicly available, or you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at:
Appears in Collections:School of Physical Sciences

Files in This Item:
File Description SizeFormat 
01frontGeoHon.pdfTitle page, abstract & contents2.73 MBAdobe PDFView/Open
02wholeGeoHon.pdfWhole thesis (as available)10.03 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.