An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana
© 2017 Geological Society of America. Detrital zircons in Neoproterozoic-Paleozoic basins of the Pacific-Gondwana (PG) region contain a distinctive 700-500 Ma population conventionally considered to be derived from Antarctica. However, the 700-600 Ma age component of the population predates major pe...
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| Format: | Journal Article |
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Geological Society of America
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/55800 |
| _version_ | 1848759710376787968 |
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| author | Martin, E. Collins, W. Kirkland, Chris |
| author_facet | Martin, E. Collins, W. Kirkland, Chris |
| author_sort | Martin, E. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Geological Society of America. Detrital zircons in Neoproterozoic-Paleozoic basins of the Pacific-Gondwana (PG) region contain a distinctive 700-500 Ma population conventionally considered to be derived from Antarctica. However, the 700-600 Ma age component of the population predates major peripheral orogenesis (Terra Australis orogen), which began at ca. 580 Ma, and the highly evolved e Hf(t) -in-zircon values (to -40) require an Archean source, which is not proximal to the Terra Australis active margin. Based on similar e Hf(t) arrays defined by Neoproterozoic granites in Western Australia and detrital zircon populations from the surrounding basins, we suggest that PG zircon grains were derived from the > 2000-km-long, late Neoproterozoic Paterson-Petermann orogen, which sutured northern and southern Australia at 550-530 Ma. This Himalayan-style orogen was responsible for amalgamating Southeast Asian terranes into northeast Gondwana, thereby constraining the paleogeography of the northern Gondwanan margin at the Precambrian-Cambrian boundary. Remarkable isotopic similarity of zircon grains with the Lhasa terrane of Tibet suggests that the Paterson-Petermann orogen was the eastern sector of the developing circum-Gondwana subduction system from ca. 700 Ma. |
| first_indexed | 2025-11-14T10:04:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-55800 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:04:12Z |
| publishDate | 2017 |
| publisher | Geological Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-558002017-09-13T16:09:55Z An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana Martin, E. Collins, W. Kirkland, Chris © 2017 Geological Society of America. Detrital zircons in Neoproterozoic-Paleozoic basins of the Pacific-Gondwana (PG) region contain a distinctive 700-500 Ma population conventionally considered to be derived from Antarctica. However, the 700-600 Ma age component of the population predates major peripheral orogenesis (Terra Australis orogen), which began at ca. 580 Ma, and the highly evolved e Hf(t) -in-zircon values (to -40) require an Archean source, which is not proximal to the Terra Australis active margin. Based on similar e Hf(t) arrays defined by Neoproterozoic granites in Western Australia and detrital zircon populations from the surrounding basins, we suggest that PG zircon grains were derived from the > 2000-km-long, late Neoproterozoic Paterson-Petermann orogen, which sutured northern and southern Australia at 550-530 Ma. This Himalayan-style orogen was responsible for amalgamating Southeast Asian terranes into northeast Gondwana, thereby constraining the paleogeography of the northern Gondwanan margin at the Precambrian-Cambrian boundary. Remarkable isotopic similarity of zircon grains with the Lhasa terrane of Tibet suggests that the Paterson-Petermann orogen was the eastern sector of the developing circum-Gondwana subduction system from ca. 700 Ma. 2017 Journal Article http://hdl.handle.net/20.500.11937/55800 10.1130/G39152.1 Geological Society of America restricted |
| spellingShingle | Martin, E. Collins, W. Kirkland, Chris An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title | An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title_full | An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title_fullStr | An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title_full_unstemmed | An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title_short | An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
| title_sort | australian source for pacific-gondwanan zircons: implications for the assembly of northeastern gondwana |
| url | http://hdl.handle.net/20.500.11937/55800 |