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Abstract:

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.

Registro:

Documento: Artículo
Título:Diachronic Cenozoic wrenching in southwest of the Colombian Basin
Autor:Alfaro, E.; Barrera, D.F.; Rossello, E.A.
Filiación:Laboratório de Geofisica de Exploração de Petróleo (LAGEP), Cntr. de Pesquisas em Geofisica e Geologia (CPGG), Grupo de Estratigrafia Teorica e Aplicada (GETA), Universidade Federal da Bahia, Instituto de Geociências, Campus Universitario de Ondina, rua Barão de Jeremoabo, s/n, Salvador, BA, Brazil
Departamento de Ciências e Engenharia de Petróleo, Grupo de Geofísica Computacional (GGC) - IMECC, Universidade Estadual de Campinas, Brazil
CONICET - FCEN, Universidad de Buenos Aires, (1428) Buenos Aires, Argentina
Palabras clave: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
Año:2013
Volumen:100
Número:1
Página de inicio:55
Página de fin:65
Título revista:Comunicacoes Geologicas
Título revista abreviado:Comunicacoes Geologicas
ISSN:0873948X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0873948X_v100_n1_p55_Alfaro

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Citas:

---------- APA ----------
Alfaro, E., Barrera, D.F. & Rossello, E.A. (2013) . Diachronic Cenozoic wrenching in southwest of the Colombian Basin . Comunicacoes Geologicas, 100(1), 55-65.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0873948X_v100_n1_p55_Alfaro [ ]
---------- CHICAGO ----------
Alfaro, E., Barrera, D.F., Rossello, E.A. "Diachronic Cenozoic wrenching in southwest of the Colombian Basin " . Comunicacoes Geologicas 100, no. 1 (2013) : 55-65.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0873948X_v100_n1_p55_Alfaro [ ]
---------- MLA ----------
Alfaro, E., Barrera, D.F., Rossello, E.A. "Diachronic Cenozoic wrenching in southwest of the Colombian Basin " . Comunicacoes Geologicas, vol. 100, no. 1, 2013, pp. 55-65.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0873948X_v100_n1_p55_Alfaro [ ]
---------- VANCOUVER ----------
Alfaro, E., Barrera, D.F., Rossello, E.A. Diachronic Cenozoic wrenching in southwest of the Colombian Basin . Comunicacoes Geologicas. 2013;100(1):55-65.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0873948X_v100_n1_p55_Alfaro [ ]