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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Online Access: | https://hdl.handle.net/20.500.11937/55800 https://doi.org/10.1130/G39152.1 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/55800 2023-06-11T04:04:14+02:00 An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana Martin, E. Collins, W. Kirkland, Chris 2017 restricted https://hdl.handle.net/20.500.11937/55800 https://doi.org/10.1130/G39152.1 unknown Geological Society of America http://hdl.handle.net/20.500.11937/55800 doi:10.1130/G39152.1 Journal Article 2017 ftcurtin https://doi.org/20.500.11937/5580010.1130/G39152.1 2023-05-30T19:48:52Z © 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. Article in Journal/Newspaper Antarc* Antarctica Curtin University: espace Pacific Paterson ENVELOPE(-154.600,-154.600,-78.033,-78.033) Terra Australis ENVELOPE(-62.900,-62.900,-64.900,-64.900) Geology G39152.1 |
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Curtin University: espace |
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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. |
format |
Article in Journal/Newspaper |
author |
Martin, E. Collins, W. Kirkland, Chris |
spellingShingle |
Martin, E. Collins, W. Kirkland, Chris An Australian source for Pacific-Gondwanan zircons: Implications for the assembly of northeastern Gondwana |
author_facet |
Martin, E. Collins, W. Kirkland, Chris |
author_sort |
Martin, E. |
title |
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_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_sort |
australian source for pacific-gondwanan zircons: implications for the assembly of northeastern gondwana |
publisher |
Geological Society of America |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11937/55800 https://doi.org/10.1130/G39152.1 |
long_lat |
ENVELOPE(-154.600,-154.600,-78.033,-78.033) ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
geographic |
Pacific Paterson Terra Australis |
geographic_facet |
Pacific Paterson Terra Australis |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
http://hdl.handle.net/20.500.11937/55800 doi:10.1130/G39152.1 |
op_doi |
https://doi.org/20.500.11937/5580010.1130/G39152.1 |
container_title |
Geology |
container_start_page |
G39152.1 |
_version_ |
1768386270286839808 |