Diachronic Cenozoic wrenching in southwest of the Colombian Basin

We propose a major Eocene tectonic inversion related to an oblique convergence between Farallon (after Cocos plate) and Caribbean plates in the offshore of Colombian Caribbean. Between Eocene- Oligocene occurred an extension and another tectonic inversion since Oligocene to Pleistocene. By structura...

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Autores principales: Alfaro, E., Barrera, D.F., Rossello, E.A.
Formato: JOUR
Materias:
Cocos plate
Colombian basin
Colombian Caribbean
Farallon plate
Offshore
Syndepositional
Tectonic inversion
Wrenching
Caribbean plate
diachronism
Eocene
inversion tectonics
offshore structure
Oligocene
Pleistocene
unconformity
Atlantic Ocean
Caribbean Sea
Colombian Basin
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0873948X_v100_n1_p55_Alfaro
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0873948X_v100_n1_p55_Alfaro
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spelling todo:paper_0873948X_v100_n1_p55_Alfaro2023-10-03T15:40:19Z Diachronic Cenozoic wrenching in southwest of the Colombian Basin Alfaro, E. Barrera, D.F. Rossello, E.A. Cocos plate Colombian basin Colombian Caribbean Farallon plate Offshore Syndepositional Tectonic inversion Wrenching Caribbean plate Cocos plate diachronism Eocene inversion tectonics offshore structure Oligocene Pleistocene unconformity Atlantic Ocean Caribbean Sea Colombian Basin We propose a major Eocene tectonic inversion related to an oblique convergence between Farallon (after Cocos plate) and Caribbean plates in the offshore of Colombian Caribbean. Between Eocene- Oligocene occurred an extension and another tectonic inversion since Oligocene to Pleistocene. By structural and stratigraphic evidence extracted from seismic, gravity and well data, we identified diverse diachronic Cenozoic deformations related to an important syndepositional wrenching event. Diachronic wrench system corresponds with Riedel structures and subordinated related-structures which have been growing progressively from north to south as result of convergence of Farallon (after Cocos plate) and Caribbean plates. Older basement-involved structures were inverted since Eocene. Tectonic inversions were interpreted from different strata geometries, relations of strata, growth strata and erosive truncations. A regional Eocene unconformity defined by erosional truncations reveals the timing of tectonic inversion and consequently closure of Colombian basin at northern boundary. The Eocene erosional unconformity becomes conformable toward the basin and should be an important correlative stratigraphic surface in the Caribbean offshore. © 2013 LNEG - Laboratório Nacional de Geologia e Energia IP. Fil:Rossello, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0873948X_v100_n1_p55_Alfaro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cocos plate
Colombian basin
Colombian Caribbean
Farallon plate
Offshore
Syndepositional
Tectonic inversion
Wrenching
Caribbean plate
Cocos plate
diachronism
Eocene
inversion tectonics
offshore structure
Oligocene
Pleistocene
unconformity
Atlantic Ocean
Caribbean Sea
Colombian Basin
spellingShingle Cocos plate
Colombian basin
Colombian Caribbean
Farallon plate
Offshore
Syndepositional
Tectonic inversion
Wrenching
Caribbean plate
Cocos plate
diachronism
Eocene
inversion tectonics
offshore structure
Oligocene
Pleistocene
unconformity
Atlantic Ocean
Caribbean Sea
Colombian Basin
Alfaro, E.
Barrera, D.F.
Rossello, E.A.
Diachronic Cenozoic wrenching in southwest of the Colombian Basin
topic_facet Cocos plate
Colombian basin
Colombian Caribbean
Farallon plate
Offshore
Syndepositional
Tectonic inversion
Wrenching
Caribbean plate
Cocos plate
diachronism
Eocene
inversion tectonics
offshore structure
Oligocene
Pleistocene
unconformity
Atlantic Ocean
Caribbean Sea
Colombian Basin
description We propose a major Eocene tectonic inversion related to an oblique convergence between Farallon (after Cocos plate) and Caribbean plates in the offshore of Colombian Caribbean. Between Eocene- Oligocene occurred an extension and another tectonic inversion since Oligocene to Pleistocene. By structural and stratigraphic evidence extracted from seismic, gravity and well data, we identified diverse diachronic Cenozoic deformations related to an important syndepositional wrenching event. Diachronic wrench system corresponds with Riedel structures and subordinated related-structures which have been growing progressively from north to south as result of convergence of Farallon (after Cocos plate) and Caribbean plates. Older basement-involved structures were inverted since Eocene. Tectonic inversions were interpreted from different strata geometries, relations of strata, growth strata and erosive truncations. A regional Eocene unconformity defined by erosional truncations reveals the timing of tectonic inversion and consequently closure of Colombian basin at northern boundary. The Eocene erosional unconformity becomes conformable toward the basin and should be an important correlative stratigraphic surface in the Caribbean offshore. © 2013 LNEG - Laboratório Nacional de Geologia e Energia IP.
format JOUR
author Alfaro, E.
Barrera, D.F.
Rossello, E.A.
author_facet Alfaro, E.
Barrera, D.F.
Rossello, E.A.
author_sort Alfaro, E.
title Diachronic Cenozoic wrenching in southwest of the Colombian Basin
title_short Diachronic Cenozoic wrenching in southwest of the Colombian Basin
title_full Diachronic Cenozoic wrenching in southwest of the Colombian Basin
title_fullStr Diachronic Cenozoic wrenching in southwest of the Colombian Basin
title_full_unstemmed Diachronic Cenozoic wrenching in southwest of the Colombian Basin
title_sort diachronic cenozoic wrenching in southwest of the colombian basin
url http://hdl.handle.net/20.500.12110/paper_0873948X_v100_n1_p55_Alfaro
work_keys_str_mv AT alfaroe diachroniccenozoicwrenchinginsouthwestofthecolombianbasin
AT barreradf diachroniccenozoicwrenchinginsouthwestofthecolombianbasin
AT rosselloea diachroniccenozoicwrenchinginsouthwestofthecolombianbasin
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