Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on
Summary In order to emphasize the tectonic behaviour of stabilized continental crust during later tectonic activity, we investigated the composite metamorphic basement of the Terre Adélie Craton (TAC). Two domains are recognized: (1) a Neoarchean basement, made of a deep granulitic crust to the East...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.529.3150 2023-05-15T13:56:04+02:00 Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.3150 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.3150 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf text ftciteseerx 2016-01-08T10:29:48Z Summary In order to emphasize the tectonic behaviour of stabilized continental crust during later tectonic activity, we investigated the composite metamorphic basement of the Terre Adélie Craton (TAC). Two domains are recognized: (1) a Neoarchean basement, made of a deep granulitic crust to the East, and an amphibolitic crust to the West, and (2) two Paleoproterozoic basins overlying the Neoarchean amphibolitic crust and extending further West. New geochronological data from the TAC reveal a tectonic evolution with two major events. Monazites ages from the Neoarchean granulitic crust illustrate a main tectono-metamorphic event around 2.45Ga. Localized resetting of monazites geochronometer occurred around 1.7Ga within small fluid bearing shear zones. New 40Ar/39Ar ages from amphibole, and micas from both Neoarchean basement and Paleoproterozoic basins illustrate their differential evolution Text Antarc* Antarctica East Antarctica Unknown East Antarctica Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Summary In order to emphasize the tectonic behaviour of stabilized continental crust during later tectonic activity, we investigated the composite metamorphic basement of the Terre Adélie Craton (TAC). Two domains are recognized: (1) a Neoarchean basement, made of a deep granulitic crust to the East, and an amphibolitic crust to the West, and (2) two Paleoproterozoic basins overlying the Neoarchean amphibolitic crust and extending further West. New geochronological data from the TAC reveal a tectonic evolution with two major events. Monazites ages from the Neoarchean granulitic crust illustrate a main tectono-metamorphic event around 2.45Ga. Localized resetting of monazites geochronometer occurred around 1.7Ga within small fluid bearing shear zones. New 40Ar/39Ar ages from amphibole, and micas from both Neoarchean basement and Paleoproterozoic basins illustrate their differential evolution |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
spellingShingle |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
title_short |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
title_full |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
title_fullStr |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
title_full_unstemmed |
Superposition of Neoarchean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on |
title_sort |
superposition of neoarchean and paleoproterozoic tectonics in the terre adélie craton (east antarctica): evidence from th-u-pb ages on |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.3150 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
East Antarctica Tac Terre Adélie Terre-Adélie |
geographic_facet |
East Antarctica Tac Terre Adélie Terre-Adélie |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.529.3150 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea072.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263291100790784 |