The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover
The first U-Pb and Hf-Lu isotopic data of detrital zircons from Devonian strata of the Malvinas (Falkland) Islands allow re-evaluation of different hypotheses regarding their location before the breakup of Gondwana. Of the various published hypotheses there are only two that have gained support. Adi...
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ftconicet:oai:ri.conicet.gov.ar:11336/60281 2023-10-09T21:55:56+02:00 The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover Ramos, Victor Alberto Cingolani, Carlos Alberto Chemale Junior, Farid Naipauer, Maximiliano Rapalini, Augusto Ernesto application/pdf http://hdl.handle.net/11336/60281 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.12.013 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981116301481 http://hdl.handle.net/11336/60281 Ramos, Victor Alberto; Cingolani, Carlos Alberto; Chemale Junior, Farid Naipauer, Maximiliano; Rapalini, Augusto Ernesto; The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 76; 7-2017; 320-345 0895-9811 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ BLOCK ROTATION DETRITAL ZIRCONS MALVINAS (FALKLAND) PLATEAU PALEOGEOGRAPHY PATAGONIA U-PB AND LU-HF ISOTOPES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.jsames.2016.12.013 2023-09-24T18:33:55Z The first U-Pb and Hf-Lu isotopic data of detrital zircons from Devonian strata of the Malvinas (Falkland) Islands allow re-evaluation of different hypotheses regarding their location before the breakup of Gondwana. Of the various published hypotheses there are only two that have gained support. Adie's hypothesis involves a rotation of 180 degrees of the islands and a large displacement of Patagonia, independently of South America, whereas Borrello's hypothesis assumes a relative fixed position of the islands with respect to South America over time. The first hypothesis has traditionally been evaluated by highlighting the similarities of the geology of the Malvinas Islands with similar rocks cropping out in South Africa. In this paper we test those hypotheses that led to correlate the islands with the Cape System, based on geological, paleomagnetic and geochronological data. However, new isotopic data compared with contemporaneous Patagonian rocks, together with the present knowledge of offshore features of the Malvinas Plateau, suggest that its correlation with South Africa is not as compelling. Although there is no conclusive evidence, the simplest hypothesis based on the present available datasets, favors a closer relationship with Patagonia. No doubt that more research is needed in order to elucidate the paleogeography of the Malvinas Islands before the opening of the South Atlantic Ocean. Fil: Ramos, Victor Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Cingolani, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ... Article in Journal/Newspaper South Atlantic Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Patagonia Argentina Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Ramos ENVELOPE(-59.700,-59.700,-62.500,-62.500) Falkland Plateau ENVELOPE(-50.000,-50.000,-51.000,-51.000) Journal of South American Earth Sciences 76 320 345 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BLOCK ROTATION DETRITAL ZIRCONS MALVINAS (FALKLAND) PLATEAU PALEOGEOGRAPHY PATAGONIA U-PB AND LU-HF ISOTOPES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
BLOCK ROTATION DETRITAL ZIRCONS MALVINAS (FALKLAND) PLATEAU PALEOGEOGRAPHY PATAGONIA U-PB AND LU-HF ISOTOPES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Ramos, Victor Alberto Cingolani, Carlos Alberto Chemale Junior, Farid Naipauer, Maximiliano Rapalini, Augusto Ernesto The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
topic_facet |
BLOCK ROTATION DETRITAL ZIRCONS MALVINAS (FALKLAND) PLATEAU PALEOGEOGRAPHY PATAGONIA U-PB AND LU-HF ISOTOPES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The first U-Pb and Hf-Lu isotopic data of detrital zircons from Devonian strata of the Malvinas (Falkland) Islands allow re-evaluation of different hypotheses regarding their location before the breakup of Gondwana. Of the various published hypotheses there are only two that have gained support. Adie's hypothesis involves a rotation of 180 degrees of the islands and a large displacement of Patagonia, independently of South America, whereas Borrello's hypothesis assumes a relative fixed position of the islands with respect to South America over time. The first hypothesis has traditionally been evaluated by highlighting the similarities of the geology of the Malvinas Islands with similar rocks cropping out in South Africa. In this paper we test those hypotheses that led to correlate the islands with the Cape System, based on geological, paleomagnetic and geochronological data. However, new isotopic data compared with contemporaneous Patagonian rocks, together with the present knowledge of offshore features of the Malvinas Plateau, suggest that its correlation with South Africa is not as compelling. Although there is no conclusive evidence, the simplest hypothesis based on the present available datasets, favors a closer relationship with Patagonia. No doubt that more research is needed in order to elucidate the paleogeography of the Malvinas Islands before the opening of the South Atlantic Ocean. Fil: Ramos, Victor Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Cingolani, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; ... |
format |
Article in Journal/Newspaper |
author |
Ramos, Victor Alberto Cingolani, Carlos Alberto Chemale Junior, Farid Naipauer, Maximiliano Rapalini, Augusto Ernesto |
author_facet |
Ramos, Victor Alberto Cingolani, Carlos Alberto Chemale Junior, Farid Naipauer, Maximiliano Rapalini, Augusto Ernesto |
author_sort |
Ramos, Victor Alberto |
title |
The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
title_short |
The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
title_full |
The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
title_fullStr |
The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
title_full_unstemmed |
The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover |
title_sort |
malvinas (falkland) islands revisited: the tectonic evolution of southern gondwana based on u-pb and lu-hf detrital zircon isotopes in the paleozoic cover |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/60281 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(-59.700,-59.700,-62.500,-62.500) ENVELOPE(-50.000,-50.000,-51.000,-51.000) |
geographic |
Patagonia Argentina Pablo Ramos Falkland Plateau |
geographic_facet |
Patagonia Argentina Pablo Ramos Falkland Plateau |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2016.12.013 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981116301481 http://hdl.handle.net/11336/60281 Ramos, Victor Alberto; Cingolani, Carlos Alberto; Chemale Junior, Farid Naipauer, Maximiliano; Rapalini, Augusto Ernesto; The Malvinas (Falkland) Islands revisited: The tectonic evolution of southern Gondwana based on U-Pb and Lu-Hf detrital zircon isotopes in the Paleozoic cover; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 76; 7-2017; 320-345 0895-9811 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.jsames.2016.12.013 |
container_title |
Journal of South American Earth Sciences |
container_volume |
76 |
container_start_page |
320 |
op_container_end_page |
345 |
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1779320197862129664 |