Development of the early Paleozoic Pacific margin of Gondwana from detrital-zircon ages across the Delamerian orogen

Research Article| March 01, 1998 Development of the early Paleozoic Pacific margin of Gondwana from detrital-zircon ages across the Delamerian orogen T. R. Ireland; T. R. Ireland 1Research School of Earth Sciences, Australian National University, Canberra 0200, Australia Search for other works by this author on: GSW Google Scholar T. Flöttmann; T. Flöttmann 2Department of Geology and Geophysics, University of Adelaide, Adelaide 5005, Australia Search for other works by this author on: GSW Google Scholar C. M. Fanning; C. M. Fanning 1Research School of Earth Sciences, Australian National University, Canberra 0200, Australia Search for other works by this author on: GSW Google Scholar G. M. Gibson; G. M. Gibson 3University of Southern Queensland, Toowoomba 4350, Australia Search for other works by this author on: GSW Google Scholar W. V. Preiss W. V. Preiss 4Mines and Energy, South Australia, Eastwood 5063, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information T. R. Ireland 1Research School of Earth Sciences, Australian National University, Canberra 0200, Australia T. Flöttmann 2Department of Geology and Geophysics, University of Adelaide, Adelaide 5005, Australia C. M. Fanning 1Research School of Earth Sciences, Australian National University, Canberra 0200, Australia G. M. Gibson 3University of Southern Queensland, Toowoomba 4350, Australia W. V. Preiss 4Mines and Energy, South Australia, Eastwood 5063, Australia Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1998) 26 (3): 243–246. https://doi.org/10.1130/0091-7613(1998)0262.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation T. R. Ireland, T. Flöttmann, C. M. Fanning, G. M. Gibson, W. V. Preiss; Development of the early Paleozoic Pacific margin of Gondwana from detrital-zircon ages across the Delamerian orogen. Geology 1998;; 26 (3): 243–246. doi: https://doi.org/10.1130/0091-7613(1998)0262.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Detrital-zircon age spectra have been determined for sedimentary rocks from the Delamerian orogen, southern Australia. In Neoproterozoic sedimentary rocks, patterns progressively change from Mesoproterozoic- to Neoproterozoic-dominated detritus and there are few zircons that are close to the depositional age. The base of the Cambrian Kanmantoo Group marks an abrupt change in provenance to detrital patterns dominated by Ross and Delamerian (600–500 Ma) and Grenvillean ages (1200–1000 Ma). These patterns are strikingly similar to those obtained from Lachlan fold belt sedimentary rocks, indicating that the sedimentation recorded in the Kanmantoo Group marks a change from deposition of sediments derived from the Australian cratons to those representative of the early Paleozoic Gondwana mudpile. If sedimentary rocks with zircon-provenance characteristics such as those of the Kanmantoo rocks extend under elements of the Lachlan fold belt, they would provide suitable protoliths for the S-type granites of southeastern Australia. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.