Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling
The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous...
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Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman |
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todo:paper_00401951_v590_n_p106_Likerman2023-10-03T14:50:18Z Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling Likerman, J. Burlando, J.F. Cristallini, E.O. Ghiglione, M.C. Analog modeling Asymmetric rift Southern Patagonian Andes Tectonic inversion Transfer zones Analog modeling Asymmetric rift Physical modeling Positive inversion Southern Patagonian Andes Structural domains Structural variations Transfer zones Sedimentary rocks Tectonics Models correlation Cretaceous cross section depocenter fold and thrust belt inversion tectonics Jurassic numerical model orogeny seismic data Andes Patagonia The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous to Neogene tectonic compression. The resultant fold-thrust belt displays significant along-strike variations in width and lateral position of the structural domains that may be reflecting a first order control of the Jurassic extensional depocenters, as proposed in previous works. This hypothesis is tested using a series of scaled sandbox analog models involving the positive inversion of two adjacent depocenters with different extensional rates accommodated by a transfer fault. The correlation between structures in the Southern Patagonian Andes and the features in the model have important first order similarities supporting the theory of a positively inverted extensional basin with a previous history of southward increase in extension. Moreover structural cross-sections analyzed from field and seismic data have a geometry that is consistent with serial cross sections resulting from the models. © 2013 Elsevier B.V. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Analog modeling Asymmetric rift Southern Patagonian Andes Tectonic inversion Transfer zones Analog modeling Asymmetric rift Physical modeling Positive inversion Southern Patagonian Andes Structural domains Structural variations Transfer zones Sedimentary rocks Tectonics Models correlation Cretaceous cross section depocenter fold and thrust belt inversion tectonics Jurassic numerical model orogeny seismic data Andes Patagonia |
spellingShingle |
Analog modeling Asymmetric rift Southern Patagonian Andes Tectonic inversion Transfer zones Analog modeling Asymmetric rift Physical modeling Positive inversion Southern Patagonian Andes Structural domains Structural variations Transfer zones Sedimentary rocks Tectonics Models correlation Cretaceous cross section depocenter fold and thrust belt inversion tectonics Jurassic numerical model orogeny seismic data Andes Patagonia Likerman, J. Burlando, J.F. Cristallini, E.O. Ghiglione, M.C. Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
topic_facet |
Analog modeling Asymmetric rift Southern Patagonian Andes Tectonic inversion Transfer zones Analog modeling Asymmetric rift Physical modeling Positive inversion Southern Patagonian Andes Structural domains Structural variations Transfer zones Sedimentary rocks Tectonics Models correlation Cretaceous cross section depocenter fold and thrust belt inversion tectonics Jurassic numerical model orogeny seismic data Andes Patagonia |
description |
The Southern Patagonian Andes between 48° and 53° SL offers a unique opportunity to study the results of orogenic growth superimposed over a previously rifted region. In this sector the northern Austral or Magallanes basin was affected by late to middle Jurassic extension followed by Late Cretaceous to Neogene tectonic compression. The resultant fold-thrust belt displays significant along-strike variations in width and lateral position of the structural domains that may be reflecting a first order control of the Jurassic extensional depocenters, as proposed in previous works. This hypothesis is tested using a series of scaled sandbox analog models involving the positive inversion of two adjacent depocenters with different extensional rates accommodated by a transfer fault. The correlation between structures in the Southern Patagonian Andes and the features in the model have important first order similarities supporting the theory of a positively inverted extensional basin with a previous history of southward increase in extension. Moreover structural cross-sections analyzed from field and seismic data have a geometry that is consistent with serial cross sections resulting from the models. © 2013 Elsevier B.V. |
format |
JOUR |
author |
Likerman, J. Burlando, J.F. Cristallini, E.O. Ghiglione, M.C. |
author_facet |
Likerman, J. Burlando, J.F. Cristallini, E.O. Ghiglione, M.C. |
author_sort |
Likerman, J. |
title |
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
title_short |
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
title_full |
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
title_fullStr |
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
title_full_unstemmed |
Along-strike structural variations in the Southern Patagonian Andes: Insights from physical modeling |
title_sort |
along-strike structural variations in the southern patagonian andes: insights from physical modeling |
url |
http://hdl.handle.net/20.500.12110/paper_00401951_v590_n_p106_Likerman |
work_keys_str_mv |
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1807315327667666944 |