An Australian source for Pacific-Gondwanan zircons: implications for the assembly of northeastern Gondwana
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 o...
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ftunivnewcastnsw:uon:31472 2023-05-15T13:54:57+02:00 An Australian source for Pacific-Gondwanan zircons: implications for the assembly of northeastern Gondwana Martin, Erin L. Collins, William J. Kirkland, Christopher L. The University of Newcastle. Faculty of Science, School of Environmental and Life Sciences 2017 http://hdl.handle.net/1959.13/1355484 eng eng Geological Society of America ARC.DP120104004 http://purl.org/au-research/grants/arc/DP120104004 Geology Vol. 45, Issue 8, p. 699-702 10.1130/G39152.1 zircons Australia Antarctica Neoproterozoic–Paleozoic basins Pacific-Gondwana journal article 2017 ftunivnewcastnsw 2018-07-27T00:32:09Z 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 ɛ Hf(t) -in-zircon values (to −40) require an Archean source, which is not proximal to the Terra Australis active margin. Based on similar ɛ 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 NOVA: The University of Newcastle Research Online (Australia) Pacific Paterson ENVELOPE(-154.600,-154.600,-78.033,-78.033) Terra Australis ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
institution |
Open Polar |
collection |
NOVA: The University of Newcastle Research Online (Australia) |
op_collection_id |
ftunivnewcastnsw |
language |
English |
topic |
zircons Australia Antarctica Neoproterozoic–Paleozoic basins Pacific-Gondwana |
spellingShingle |
zircons Australia Antarctica Neoproterozoic–Paleozoic basins Pacific-Gondwana Martin, Erin L. Collins, William J. Kirkland, Christopher L. An Australian source for Pacific-Gondwanan zircons: implications for the assembly of northeastern Gondwana |
topic_facet |
zircons Australia Antarctica Neoproterozoic–Paleozoic basins Pacific-Gondwana |
description |
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 ɛ Hf(t) -in-zircon values (to −40) require an Archean source, which is not proximal to the Terra Australis active margin. Based on similar ɛ 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. |
author2 |
The University of Newcastle. Faculty of Science, School of Environmental and Life Sciences |
format |
Article in Journal/Newspaper |
author |
Martin, Erin L. Collins, William J. Kirkland, Christopher L. |
author_facet |
Martin, Erin L. Collins, William J. Kirkland, Christopher L. |
author_sort |
Martin, Erin L. |
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 |
http://hdl.handle.net/1959.13/1355484 |
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 |
ARC.DP120104004 http://purl.org/au-research/grants/arc/DP120104004 Geology Vol. 45, Issue 8, p. 699-702 10.1130/G39152.1 |
_version_ |
1766261150245191680 |