Patagonia: A paleozoic continent adrift?
The evolution of Patagonia as an independent and exotic microcontinent from the rest of South America was a recurrent hypothesis since the XIX century, reaching notoriety during the discussion times of continental drift theory. The arrival of plate tectonics triggered different hypotheses, some of t...
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ftconicet:oai:ri.conicet.gov.ar:11336/92748 2023-10-09T21:46:28+02:00 Patagonia: A paleozoic continent adrift? Ramos, Victor Alberto application/pdf http://hdl.handle.net/11336/92748 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2008.06.002 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981108000527 http://hdl.handle.net/11336/92748 Ramos, Victor Alberto; Patagonia: A paleozoic continent adrift?; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 26; 3; 11-2008; 235-251 0895-9811 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ ALLOCHTHONOUS ANDES EXOTIC PALEOZOIC PARA-AUTOCHTHONOUS TERRANES 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.2008.06.002 2023-09-24T18:47:25Z The evolution of Patagonia as an independent and exotic microcontinent from the rest of South America was a recurrent hypothesis since the XIX century, reaching notoriety during the discussion times of continental drift theory. The arrival of plate tectonics triggered different hypotheses, some of them with fixist interpretations that consider Patagonia as an autochthonous part of Gondwana, and others more mobilistic that postulate an allochthonous origin. After several decades, although some consensus exists among those hypotheses that postulate its allochthony, there is no agreement in its boundaries, subduction, accretion, and final amalgamation times to the Gondwana supercontinent. In this review the different magmatic belts are analyzed, their deformation and metamorphism, the associated sedimentary basins, as well as the existing geochronologic controls. Aware that important uncertainties still remain, a new model is proposed with two magmatic arcs: a western belt that was active from the Devonian to the mid Carboniferous, and a northern one partially coeval that led to the collision of Patagonia against the southwestern margin of Gondwana in the Lower Permian. It is hypothesized that the termination of the western magmatic arc activity was linked to the collision of the Antarctic Peninsula and associated terranes. The reconstruction of the plate tectonic history of Patagonia during the Paleozoic shows the existence of several episodes of fragmentation and rifting, convergence and accretion, renewed periods of rifting and reaccretion to the Gondwana margin. Those processes were intrinsic to the formation of Terra Australis orogen, controlled by the absolute motion of the Gondwana supercontinent and guided by successive global plate reorganizations. 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 ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Patagonia Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Ramos ENVELOPE(-59.700,-59.700,-62.500,-62.500) Terra Australis ENVELOPE(-62.900,-62.900,-64.900,-64.900) Journal of South American Earth Sciences 26 3 235 251 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
ALLOCHTHONOUS ANDES EXOTIC PALEOZOIC PARA-AUTOCHTHONOUS TERRANES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
ALLOCHTHONOUS ANDES EXOTIC PALEOZOIC PARA-AUTOCHTHONOUS TERRANES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Ramos, Victor Alberto Patagonia: A paleozoic continent adrift? |
topic_facet |
ALLOCHTHONOUS ANDES EXOTIC PALEOZOIC PARA-AUTOCHTHONOUS TERRANES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The evolution of Patagonia as an independent and exotic microcontinent from the rest of South America was a recurrent hypothesis since the XIX century, reaching notoriety during the discussion times of continental drift theory. The arrival of plate tectonics triggered different hypotheses, some of them with fixist interpretations that consider Patagonia as an autochthonous part of Gondwana, and others more mobilistic that postulate an allochthonous origin. After several decades, although some consensus exists among those hypotheses that postulate its allochthony, there is no agreement in its boundaries, subduction, accretion, and final amalgamation times to the Gondwana supercontinent. In this review the different magmatic belts are analyzed, their deformation and metamorphism, the associated sedimentary basins, as well as the existing geochronologic controls. Aware that important uncertainties still remain, a new model is proposed with two magmatic arcs: a western belt that was active from the Devonian to the mid Carboniferous, and a northern one partially coeval that led to the collision of Patagonia against the southwestern margin of Gondwana in the Lower Permian. It is hypothesized that the termination of the western magmatic arc activity was linked to the collision of the Antarctic Peninsula and associated terranes. The reconstruction of the plate tectonic history of Patagonia during the Paleozoic shows the existence of several episodes of fragmentation and rifting, convergence and accretion, renewed periods of rifting and reaccretion to the Gondwana margin. Those processes were intrinsic to the formation of Terra Australis orogen, controlled by the absolute motion of the Gondwana supercontinent and guided by successive global plate reorganizations. 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 ... |
format |
Article in Journal/Newspaper |
author |
Ramos, Victor Alberto |
author_facet |
Ramos, Victor Alberto |
author_sort |
Ramos, Victor Alberto |
title |
Patagonia: A paleozoic continent adrift? |
title_short |
Patagonia: A paleozoic continent adrift? |
title_full |
Patagonia: A paleozoic continent adrift? |
title_fullStr |
Patagonia: A paleozoic continent adrift? |
title_full_unstemmed |
Patagonia: A paleozoic continent adrift? |
title_sort |
patagonia: a paleozoic continent adrift? |
publisher |
Pergamon-Elsevier Science Ltd |
url |
http://hdl.handle.net/11336/92748 |
long_lat |
ENVELOPE(-63.717,-63.717,-64.283,-64.283) ENVELOPE(-59.700,-59.700,-62.500,-62.500) ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia Pablo Ramos Terra Australis |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia Pablo Ramos Terra Australis |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2008.06.002 info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0895981108000527 http://hdl.handle.net/11336/92748 Ramos, Victor Alberto; Patagonia: A paleozoic continent adrift?; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 26; 3; 11-2008; 235-251 0895-9811 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.jsames.2008.06.002 |
container_title |
Journal of South American Earth Sciences |
container_volume |
26 |
container_issue |
3 |
container_start_page |
235 |
op_container_end_page |
251 |
_version_ |
1779322179887824896 |