Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin

A diachronic Cenozoic wrenching has taken place in southwest of Colombian Basin. By structural and stratigraphic evidences extracted from seismic, gravity and well data, we identified diverse diachronic Cenozoic deformations related to an important syndepositional wrenching event. Diachronic wrench...

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Detalles Bibliográficos
Autores principales: Alfaro, E.S., Barrera, D.F., Rossello, E.
Formato: CONF
Materias:
Deformation
Geophysical prospecting
Offshore oil well production
Reflection
Seismology
Stratigraphy
Tectonics
Carbonate sedimentations
Colombian basins
Flower structures
Fundamental tools
Growth strata
Sedimentary records
Seismic interpretation
Stratigraphic surfaces
Plates (structural components)
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_97816227_v_n_p1156_Alfaro
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_97816227_v_n_p1156_Alfaro
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spelling todo:paper_97816227_v_n_p1156_Alfaro2023-10-03T16:44:30Z Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin Alfaro, E.S. Barrera, D.F. Rossello, E. Deformation Geophysical prospecting Offshore oil well production Reflection Seismology Stratigraphy Tectonics Carbonate sedimentations Colombian basins Flower structures Fundamental tools Growth strata Sedimentary records Seismic interpretation Stratigraphic surfaces Plates (structural components) A diachronic Cenozoic wrenching has taken place in southwest of Colombian Basin. By structural and stratigraphic evidences 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. Seismic interpretation of structures, growth strata, terminations of reflectors, stratigraphic key surfaces (onlap, toplap, downlap and erosive truncations) was a fundamental tool in order to determine the timing of deformation and sedimentation. Negative and positive flower structures have been growing simultaneously with clastic and carbonate sedimentation. Structures as Hess Escarpment correspond with deeper flower structures. Older basement-involved structures were inverted since Eocene. Tectonic inversion was interpreted from different strata geometries, relations of strata, growth strata and reflector terminations. A regional unconformity defined by erosional truncations reveals the timing of tectonic inversion and consequently closure of Colombian basin at northern boundary. An Eocene erosive unconformity occurred in most of Colombian basins and has been related to Andean orogeny. The Eocene erosive unconformity also is present in Caribbean offshore and should be an important correlative stratigraphic surface in Caribbean sedimentary record. © 2012 SEG. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_97816227_v_n_p1156_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 Deformation
Geophysical prospecting
Offshore oil well production
Reflection
Seismology
Stratigraphy
Tectonics
Carbonate sedimentations
Colombian basins
Flower structures
Fundamental tools
Growth strata
Sedimentary records
Seismic interpretation
Stratigraphic surfaces
Plates (structural components)
spellingShingle Deformation
Geophysical prospecting
Offshore oil well production
Reflection
Seismology
Stratigraphy
Tectonics
Carbonate sedimentations
Colombian basins
Flower structures
Fundamental tools
Growth strata
Sedimentary records
Seismic interpretation
Stratigraphic surfaces
Plates (structural components)
Alfaro, E.S.
Barrera, D.F.
Rossello, E.
Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
topic_facet Deformation
Geophysical prospecting
Offshore oil well production
Reflection
Seismology
Stratigraphy
Tectonics
Carbonate sedimentations
Colombian basins
Flower structures
Fundamental tools
Growth strata
Sedimentary records
Seismic interpretation
Stratigraphic surfaces
Plates (structural components)
description A diachronic Cenozoic wrenching has taken place in southwest of Colombian Basin. By structural and stratigraphic evidences 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. Seismic interpretation of structures, growth strata, terminations of reflectors, stratigraphic key surfaces (onlap, toplap, downlap and erosive truncations) was a fundamental tool in order to determine the timing of deformation and sedimentation. Negative and positive flower structures have been growing simultaneously with clastic and carbonate sedimentation. Structures as Hess Escarpment correspond with deeper flower structures. Older basement-involved structures were inverted since Eocene. Tectonic inversion was interpreted from different strata geometries, relations of strata, growth strata and reflector terminations. A regional unconformity defined by erosional truncations reveals the timing of tectonic inversion and consequently closure of Colombian basin at northern boundary. An Eocene erosive unconformity occurred in most of Colombian basins and has been related to Andean orogeny. The Eocene erosive unconformity also is present in Caribbean offshore and should be an important correlative stratigraphic surface in Caribbean sedimentary record. © 2012 SEG.
format CONF
author Alfaro, E.S.
Barrera, D.F.
Rossello, E.
author_facet Alfaro, E.S.
Barrera, D.F.
Rossello, E.
author_sort Alfaro, E.S.
title Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
title_short Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
title_full Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
title_fullStr Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
title_full_unstemmed Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin
title_sort diachronic cenozoic wrenching and an eocene unconformity in southwest of the colombian basin
url http://hdl.handle.net/20.500.12110/paper_97816227_v_n_p1156_Alfaro
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AT barreradf diachroniccenozoicwrenchingandaneoceneunconformityinsouthwestofthecolombianbasin
AT rosselloe diachroniccenozoicwrenchingandaneoceneunconformityinsouthwestofthecolombianbasin
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