Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia
A U-Pb zircon sensitive high-resolution ion microprobe age of 1119.4 ± 8.5 Ma, obtained from a quartz syenite dredged from the South Tasman Rise (Australia), provides the first direct evidence of the presence of Grenville-age magmatic rocks along the central part of the hypothesized Australia–East A...
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Online Access: | http://hdl.handle.net/2440/16503 https://doi.org/10.1130/G21671.1 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/16503 2023-12-24T10:09:30+01:00 Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia Fioretti, A. Black, L. Foden, J. Visona, D. 2005 http://hdl.handle.net/2440/16503 https://doi.org/10.1130/G21671.1 en eng Geological Soc America Inc Geology (Boulder), 2005; 33(10):769-772 0091-7613 http://hdl.handle.net/2440/16503 doi:10.1130/G21671.1 Foden, J. [0000-0003-3564-7253] © 2005 Geological Society of America http://dx.doi.org/10.1130/g21671.1 South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP Journal article 2005 ftunivadelaidedl https://doi.org/10.1130/G21671.110.1130/g21671.1 2023-11-27T23:21:20Z A U-Pb zircon sensitive high-resolution ion microprobe age of 1119.4 ± 8.5 Ma, obtained from a quartz syenite dredged from the South Tasman Rise (Australia), provides the first direct evidence of the presence of Grenville-age magmatic rocks along the central part of the hypothesized Australia–East Antarctica conjugate margin of Laurentia. The distinctive mineralogy and geochemistry of the rock and its Sm-Nd and Pb isotopic signatures 1) indicate that it represents a juvenile Grenville-age addition to the crust, 2) support a correlation with the Grenville magmatic province of the western United States, and 3) set a unique pivotal point for a precise reconstruction of Rodinia. The resulting scenario implies the presence of a new magmatic province crossing the East Antarctic craton, the extension of Proterozoic belts of southwest Laurentia to East Antarctica, and appears consistent with the Australia–western United States (AUSWUS) model. This tectonic setting envisages a near-local source for the ubiquitous Grenville-age detrital zircon population in marginal Neoproterozoic to early Paleozoic Gondwanan sequences and suggests a possible direct source for the widespread Grenville-age inherited zircon component observed in most Paleozoic granites in northern Victoria Land (Antarctica) and east Tasmania (Australia). A.M. Fioretti, L.P. Black, J. Foden and D. Visonà Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land The University of Adelaide: Digital Library Antarctic East Antarctica Victoria Land South Tasman Rise ENVELOPE(148.000,148.000,-47.500,-47.500) Geology 33 10 769 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP |
spellingShingle |
South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP Fioretti, A. Black, L. Foden, J. Visona, D. Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
topic_facet |
South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP |
description |
A U-Pb zircon sensitive high-resolution ion microprobe age of 1119.4 ± 8.5 Ma, obtained from a quartz syenite dredged from the South Tasman Rise (Australia), provides the first direct evidence of the presence of Grenville-age magmatic rocks along the central part of the hypothesized Australia–East Antarctica conjugate margin of Laurentia. The distinctive mineralogy and geochemistry of the rock and its Sm-Nd and Pb isotopic signatures 1) indicate that it represents a juvenile Grenville-age addition to the crust, 2) support a correlation with the Grenville magmatic province of the western United States, and 3) set a unique pivotal point for a precise reconstruction of Rodinia. The resulting scenario implies the presence of a new magmatic province crossing the East Antarctic craton, the extension of Proterozoic belts of southwest Laurentia to East Antarctica, and appears consistent with the Australia–western United States (AUSWUS) model. This tectonic setting envisages a near-local source for the ubiquitous Grenville-age detrital zircon population in marginal Neoproterozoic to early Paleozoic Gondwanan sequences and suggests a possible direct source for the widespread Grenville-age inherited zircon component observed in most Paleozoic granites in northern Victoria Land (Antarctica) and east Tasmania (Australia). A.M. Fioretti, L.P. Black, J. Foden and D. Visonà |
format |
Article in Journal/Newspaper |
author |
Fioretti, A. Black, L. Foden, J. Visona, D. |
author_facet |
Fioretti, A. Black, L. Foden, J. Visona, D. |
author_sort |
Fioretti, A. |
title |
Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
title_short |
Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
title_full |
Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
title_fullStr |
Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
title_full_unstemmed |
Grenville-age magmatism at the South Tasman Rise (Australia): A new piercing point for the reconstruction of Rodinia |
title_sort |
grenville-age magmatism at the south tasman rise (australia): a new piercing point for the reconstruction of rodinia |
publisher |
Geological Soc America Inc |
publishDate |
2005 |
url |
http://hdl.handle.net/2440/16503 https://doi.org/10.1130/G21671.1 |
long_lat |
ENVELOPE(148.000,148.000,-47.500,-47.500) |
geographic |
Antarctic East Antarctica Victoria Land South Tasman Rise |
geographic_facet |
Antarctic East Antarctica Victoria Land South Tasman Rise |
genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
op_source |
http://dx.doi.org/10.1130/g21671.1 |
op_relation |
Geology (Boulder), 2005; 33(10):769-772 0091-7613 http://hdl.handle.net/2440/16503 doi:10.1130/G21671.1 Foden, J. [0000-0003-3564-7253] |
op_rights |
© 2005 Geological Society of America |
op_doi |
https://doi.org/10.1130/G21671.110.1130/g21671.1 |
container_title |
Geology |
container_volume |
33 |
container_issue |
10 |
container_start_page |
769 |
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1786208514743468032 |