Grenville-age magmatism at the South Tasma Rise (Australia)
A U-Pb zircon sensitive high-resolution ion microprobe age of 1119.4 6 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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ftunivpadovairis:oai:www.research.unipd.it:11577/1377192 2024-04-14T08:02:06+00:00 Grenville-age magmatism at the South Tasma Rise (Australia) FIORETTI A. M. BLACK L. P. FODEN J. VISONA', DARIO Fioretti, A. M. Black, L. P. Foden, J. Visona', Dario 2005 STAMPA http://hdl.handle.net/11577/1377192 eng eng volume:33 firstpage:769 lastpage:772 numberofpages:4 journal:GEOLOGY http://hdl.handle.net/11577/1377192 South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP info:eu-repo/semantics/article 2005 ftunivpadovairis 2024-03-21T18:57:21Z A U-Pb zircon sensitive high-resolution ion microprobe age of 1119.4 6 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). Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Victoria Land Padua Research Archive (IRIS - Università degli Studi di Padova) Antarctic East Antarctica South Tasman Rise ENVELOPE(148.000,148.000,-47.500,-47.500) Victoria Land |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP |
spellingShingle |
South Tasman Rise Rodinia Grenville East Antarctic craton SHRIMP FIORETTI A. M. BLACK L. P. FODEN J. VISONA', DARIO Grenville-age magmatism at the South Tasma Rise (Australia) |
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 6 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). |
author2 |
Fioretti, A. M. Black, L. P. Foden, J. Visona', Dario |
format |
Article in Journal/Newspaper |
author |
FIORETTI A. M. BLACK L. P. FODEN J. VISONA', DARIO |
author_facet |
FIORETTI A. M. BLACK L. P. FODEN J. VISONA', DARIO |
author_sort |
FIORETTI A. M. |
title |
Grenville-age magmatism at the South Tasma Rise (Australia) |
title_short |
Grenville-age magmatism at the South Tasma Rise (Australia) |
title_full |
Grenville-age magmatism at the South Tasma Rise (Australia) |
title_fullStr |
Grenville-age magmatism at the South Tasma Rise (Australia) |
title_full_unstemmed |
Grenville-age magmatism at the South Tasma Rise (Australia) |
title_sort |
grenville-age magmatism at the south tasma rise (australia) |
publishDate |
2005 |
url |
http://hdl.handle.net/11577/1377192 |
long_lat |
ENVELOPE(148.000,148.000,-47.500,-47.500) |
geographic |
Antarctic East Antarctica South Tasman Rise Victoria Land |
geographic_facet |
Antarctic East Antarctica South Tasman Rise Victoria Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Victoria Land |
op_relation |
volume:33 firstpage:769 lastpage:772 numberofpages:4 journal:GEOLOGY http://hdl.handle.net/11577/1377192 |
_version_ |
1796312660691648512 |