Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited
As integral parts of du Toit's (1927) "Samfrau Geosyncline", the Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) share similar paleoclimatic, paleogeographic, and paleotectonic aspects related to the Late Paleozoic tectono-magmatic activity...
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ftunibueairesbd:todo:paper_00167835_v86_n4_p819_LopezGamundi 2023-10-29T02:37:10+01:00 Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited López Gamundí, O.R. Rossello, E.A. https://hdl.handle.net/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi unknown http://hdl.handle.net/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Basin evolution Gondwanaland Karoo basin Late Paleozoic Sauce Grande basin magmatism tectonics Argentina Buenos Aires Province Sauce Grande South Africa JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi 2023-10-05T01:49:34Z As integral parts of du Toit's (1927) "Samfrau Geosyncline", the Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) share similar paleoclimatic, paleogeographic, and paleotectonic aspects related to the Late Paleozoic tectono-magmatic activity along the Panthalassan continental margin of Gondwanaland. Late Carboniferou-earliest Permian glacial deposits were deposited in the Sauce Grande (Sauce Grande Formation) and Karoo (Dwyka Formation) basins and Falkland-Malvinas Islands (Lafonia Formation) during an initial (sag) phase of extension. The pre-breakup position of the Falkland (Malvinas) Islands on the easternmost part of the Karoo basin (immediately east of the coast of South Africa) is supported by recent paleomagnetic data, lithofacies associations, paleoice flow directions and age similarities between the Dwyka and the Lafonia glacial sequences. The desintegration of the Gondwanan Ice Sheet (GIS) triggered widespread transgressions, reflected in the stratigraphic record by the presence of inter-basinally correlatable, open marine, fine-grained deposits (Piedra Azul Formation in the Sauce Grande basin, Prince Albert Formation in the Karoo basin and Port Sussex Formation in the Falkland Islands) capping glacial marine sediments. These early postglacial transgressive deposits, characterised by fossils of the Eurydesma fauna and Glossopteris flora, represent the maximum flooding of the basins. Cratonward foreland subsidence was triggered by the San Rafael orogeny (ca. 270 Ma) in Argentina and propogated along the Gondwanan margin. This subsidence phase generated sufficient space to accommodate thick synorogenic sequences derived from the orogenic flanks of the Sauce Grande and Karoo basins. Compositionally, the initial extensional phase of these basins was characterized by quartz-rich, craton-derived detritus and was followed by a compressional (foreland) phase characterized by a paleocurrent reversal and dominance of arc/foldbelt-derived material. In the Sauce Grande ... Journal/Newspaper Ice Sheet Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Basin evolution Gondwanaland Karoo basin Late Paleozoic Sauce Grande basin magmatism tectonics Argentina Buenos Aires Province Sauce Grande South Africa |
spellingShingle |
Basin evolution Gondwanaland Karoo basin Late Paleozoic Sauce Grande basin magmatism tectonics Argentina Buenos Aires Province Sauce Grande South Africa López Gamundí, O.R. Rossello, E.A. Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
topic_facet |
Basin evolution Gondwanaland Karoo basin Late Paleozoic Sauce Grande basin magmatism tectonics Argentina Buenos Aires Province Sauce Grande South Africa |
description |
As integral parts of du Toit's (1927) "Samfrau Geosyncline", the Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) share similar paleoclimatic, paleogeographic, and paleotectonic aspects related to the Late Paleozoic tectono-magmatic activity along the Panthalassan continental margin of Gondwanaland. Late Carboniferou-earliest Permian glacial deposits were deposited in the Sauce Grande (Sauce Grande Formation) and Karoo (Dwyka Formation) basins and Falkland-Malvinas Islands (Lafonia Formation) during an initial (sag) phase of extension. The pre-breakup position of the Falkland (Malvinas) Islands on the easternmost part of the Karoo basin (immediately east of the coast of South Africa) is supported by recent paleomagnetic data, lithofacies associations, paleoice flow directions and age similarities between the Dwyka and the Lafonia glacial sequences. The desintegration of the Gondwanan Ice Sheet (GIS) triggered widespread transgressions, reflected in the stratigraphic record by the presence of inter-basinally correlatable, open marine, fine-grained deposits (Piedra Azul Formation in the Sauce Grande basin, Prince Albert Formation in the Karoo basin and Port Sussex Formation in the Falkland Islands) capping glacial marine sediments. These early postglacial transgressive deposits, characterised by fossils of the Eurydesma fauna and Glossopteris flora, represent the maximum flooding of the basins. Cratonward foreland subsidence was triggered by the San Rafael orogeny (ca. 270 Ma) in Argentina and propogated along the Gondwanan margin. This subsidence phase generated sufficient space to accommodate thick synorogenic sequences derived from the orogenic flanks of the Sauce Grande and Karoo basins. Compositionally, the initial extensional phase of these basins was characterized by quartz-rich, craton-derived detritus and was followed by a compressional (foreland) phase characterized by a paleocurrent reversal and dominance of arc/foldbelt-derived material. In the Sauce Grande ... |
format |
Journal/Newspaper |
author |
López Gamundí, O.R. Rossello, E.A. |
author_facet |
López Gamundí, O.R. Rossello, E.A. |
author_sort |
López Gamundí, O.R. |
title |
Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
title_short |
Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
title_full |
Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
title_fullStr |
Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
title_full_unstemmed |
Basin fill evolution and paleotectonic patterns along the Samfrau geosyncline: The Sauce Grande basin-Ventana foldbelt (Argentina) and Karoo basin-Cape foldbelt (South Africa) revisited |
title_sort |
basin fill evolution and paleotectonic patterns along the samfrau geosyncline: the sauce grande basin-ventana foldbelt (argentina) and karoo basin-cape foldbelt (south africa) revisited |
url |
https://hdl.handle.net/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
http://hdl.handle.net/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_00167835_v86_n4_p819_LopezGamundi |
_version_ |
1781061604468588544 |