Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica
The Fosdick migmatite–granite complex of West Antarctica preserves evidence of two crustal differentiation events along a segment of the former active margin of Gondwana, one in the Devonian–Carboniferous and another in the Cretaceous. The Hf–O isotope composition of zircons from Devonian–Carbonifer...
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Geological Society of London
2016
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ftdatacite:10.6084/m9.figshare.3453362.v1 2023-05-15T14:05:28+02:00 Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica Yakymchuk, Chris Siddoway, Christine S. C. Mark Fanning Mcfadden, Rory Korhonen, Fawna J. Brown, Michael 2016 https://dx.doi.org/10.6084/m9.figshare.3453362.v1 https://geolsoc.figshare.com/articles/dataset/Anatectic_reworking_and_differentiation_of_continental_crust_along_the_active_margin_of_Gondwana_a_zircon_Hf_O_perspective___from_West_Antarctica/3453362/1 unknown Geological Society of London https://dx.doi.org/10.1144/sp383.7 https://dx.doi.org/10.6084/m9.figshare.3453362 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453362.v1 https://doi.org/10.1144/sp383.7 https://doi.org/10.6084/m9.figshare.3453362 2021-11-05T12:55:41Z The Fosdick migmatite–granite complex of West Antarctica preserves evidence of two crustal differentiation events along a segment of the former active margin of Gondwana, one in the Devonian–Carboniferous and another in the Cretaceous. The Hf–O isotope composition of zircons from Devonian–Carboniferous granites is explained by mixing of material from two crustal sources represented by the high-grade metamorphosed equivalents of a Lower Palaeozoic turbidite sequence and a Devonian calc-alkaline plutonic suite, consistent with an interpretation that the Devonian–Carboniferous granites record crustal reworking without input from a more juvenile source. The Hf–O isotope composition of zircons from Cretaceous granites reflects those same two sources, together with a contribution from a more juvenile source that is most evident in the detachment-hosted, youngest granites. The relatively non-radiogenic εHf isotope characteristics of zircons from the Fosdick complex granites are similar those from the Permo-Triassic granites from the Antarctic Peninsula. However, the Fosdick complex granites contrast with coeval granites in other localities along and across the former active margin of Gondwana, including the Tasmanides of Australia and the Western Province of New Zealand, where the wider range of more radiogenic εHf values of zircon suggests that crustal growth through the addition of juvenile material plays a larger role in granite genesis. These new results highlight prominent arc-parallel and arc-normal variations in the mechanisms and timing of crustal reworking v. crustal growth along the former active margin of Gondwana. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Antarctic Antarctic Peninsula New Zealand The Antarctic West Antarctica |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Yakymchuk, Chris Siddoway, Christine S. C. Mark Fanning Mcfadden, Rory Korhonen, Fawna J. Brown, Michael Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
The Fosdick migmatite–granite complex of West Antarctica preserves evidence of two crustal differentiation events along a segment of the former active margin of Gondwana, one in the Devonian–Carboniferous and another in the Cretaceous. The Hf–O isotope composition of zircons from Devonian–Carboniferous granites is explained by mixing of material from two crustal sources represented by the high-grade metamorphosed equivalents of a Lower Palaeozoic turbidite sequence and a Devonian calc-alkaline plutonic suite, consistent with an interpretation that the Devonian–Carboniferous granites record crustal reworking without input from a more juvenile source. The Hf–O isotope composition of zircons from Cretaceous granites reflects those same two sources, together with a contribution from a more juvenile source that is most evident in the detachment-hosted, youngest granites. The relatively non-radiogenic εHf isotope characteristics of zircons from the Fosdick complex granites are similar those from the Permo-Triassic granites from the Antarctic Peninsula. However, the Fosdick complex granites contrast with coeval granites in other localities along and across the former active margin of Gondwana, including the Tasmanides of Australia and the Western Province of New Zealand, where the wider range of more radiogenic εHf values of zircon suggests that crustal growth through the addition of juvenile material plays a larger role in granite genesis. These new results highlight prominent arc-parallel and arc-normal variations in the mechanisms and timing of crustal reworking v. crustal growth along the former active margin of Gondwana. |
format |
Dataset |
author |
Yakymchuk, Chris Siddoway, Christine S. C. Mark Fanning Mcfadden, Rory Korhonen, Fawna J. Brown, Michael |
author_facet |
Yakymchuk, Chris Siddoway, Christine S. C. Mark Fanning Mcfadden, Rory Korhonen, Fawna J. Brown, Michael |
author_sort |
Yakymchuk, Chris |
title |
Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
title_short |
Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
title_full |
Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
title_fullStr |
Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
title_full_unstemmed |
Anatectic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf–O perspective from West Antarctica |
title_sort |
anatectic reworking and differentiation of continental crust along the active margin of gondwana: a zircon hf–o perspective from west antarctica |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453362.v1 https://geolsoc.figshare.com/articles/dataset/Anatectic_reworking_and_differentiation_of_continental_crust_along_the_active_margin_of_Gondwana_a_zircon_Hf_O_perspective___from_West_Antarctica/3453362/1 |
geographic |
Antarctic Antarctic Peninsula New Zealand The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula New Zealand The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica West Antarctica |
op_relation |
https://dx.doi.org/10.1144/sp383.7 https://dx.doi.org/10.6084/m9.figshare.3453362 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3453362.v1 https://doi.org/10.1144/sp383.7 https://doi.org/10.6084/m9.figshare.3453362 |
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