Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia
Previous paleomagnetic work has appeared to demand the breakup of southwest United States−East Antarctic (SWEAT) type Rodinia reconstructions before ca. 750 Ma, significantly earlier than the stratigraphic record of rift-drift transition between 715 Ma and 650 Ma. Here we reanalyze Australian paleom...
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| Format: | Journal Article |
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Geological Society of America Inc
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/15519 |
| _version_ | 1848748914955517952 |
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| author | Li, Zheng-Xiang Evans, D. |
| author_facet | Li, Zheng-Xiang Evans, D. |
| author_sort | Li, Zheng-Xiang |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Previous paleomagnetic work has appeared to demand the breakup of southwest United States−East Antarctic (SWEAT) type Rodinia reconstructions before ca. 750 Ma, significantly earlier than the stratigraphic record of rift-drift transition between 715 Ma and 650 Ma. Here we reanalyze Australian paleomagnetic and regional tectonic data to produce a model in which the Precambrian Australian continent had a slightly different configuration before the breakup of Rodinia. A cross-continental megashear zone developed along the Paterson and Petermann orogens at ca. 650–550 Ma, during or after the breakup of Rodinia, manifested as an ∼40° clockwise rotation of the South and West Australian cratons relative to the North Australian craton around a vertical axis in Central Australia. This model reconciles major paleomagnetic discrepancies within Australia, and allows for a longer lifespan of SWEAT-like reconstructions of Rodinia that are consistent with the Neoproterozoic stratigraphic records of Australia and Laurentia. |
| first_indexed | 2025-11-14T07:12:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-15519 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:12:37Z |
| publishDate | 2011 |
| publisher | Geological Society of America Inc |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-155192017-09-13T16:00:43Z Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia Li, Zheng-Xiang Evans, D. Paterson and Petermann orogens breakup of Rodinia cross-continental megashear zone Previous paleomagnetic work has appeared to demand the breakup of southwest United States−East Antarctic (SWEAT) type Rodinia reconstructions before ca. 750 Ma, significantly earlier than the stratigraphic record of rift-drift transition between 715 Ma and 650 Ma. Here we reanalyze Australian paleomagnetic and regional tectonic data to produce a model in which the Precambrian Australian continent had a slightly different configuration before the breakup of Rodinia. A cross-continental megashear zone developed along the Paterson and Petermann orogens at ca. 650–550 Ma, during or after the breakup of Rodinia, manifested as an ∼40° clockwise rotation of the South and West Australian cratons relative to the North Australian craton around a vertical axis in Central Australia. This model reconciles major paleomagnetic discrepancies within Australia, and allows for a longer lifespan of SWEAT-like reconstructions of Rodinia that are consistent with the Neoproterozoic stratigraphic records of Australia and Laurentia. 2011 Journal Article http://hdl.handle.net/20.500.11937/15519 10.1130/G31461.1 Geological Society of America Inc restricted |
| spellingShingle | Paterson and Petermann orogens breakup of Rodinia cross-continental megashear zone Li, Zheng-Xiang Evans, D. Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title | Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title_full | Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title_fullStr | Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title_full_unstemmed | Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title_short | Late Neoproterozoic 40° intraplate rotation within Australia allows for a tighter-fi tting and longer-lasting Rodinia |
| title_sort | late neoproterozoic 40° intraplate rotation within australia allows for a tighter-fi tting and longer-lasting rodinia |
| topic | Paterson and Petermann orogens breakup of Rodinia cross-continental megashear zone |
| url | http://hdl.handle.net/20.500.11937/15519 |