Abstract:
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.
Registro:
| Documento: |
Conferencia
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| Título: | Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin |
| Autor: | Alfaro, E.S.; Barrera, D.F.; Rossello, E. |
| Filiación: | Grupo de Estratigrafia Teórica e Aplicada, Universidade Federal da Bahia, Brazil
Grupo de Geofísica Computacional, Universidade Estadual de Campinas, Brazil
CONICET, FCEN, Universidad de Buenos Aires, Argentina
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| Palabras clave: | 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) |
| Año: | 2012
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| Página de inicio: | 1156
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| Página de fin: | 1160
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| DOI: |
http://dx.doi.org/10.1190/segam2012-0313.1 |
| Título revista: | Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012
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| Título revista abreviado: | Soc. Explor. Geophys. Int. Expo. Annu. Meet., SEG
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| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_97816227_v_n_p1156_Alfaro |
Referencias:
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- James, K.H., A simple plate tectonic model of the Caribbean, a discussion of arguments for and against the far-field origin of the Caribbean Plate (2002) 16th Caribbean Geology Conference, p. 433
- Arguments for and against the Pacific origin of the Caribbean Plate: Discussion, finding for an inter-American origin (2006) Geologica Acta, 4 (1-2), pp. 279-302. , -
- In situ origin of the Caribbean: Discussion of data (2009) The Origin and Evolution of the Caribbean Plate, pp. 77-125. , -, K. H. James, M. A. Lorente, and J. L. Pindell, The Geological Society of London
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- Pindell, J.L., Kennan, L., Tectonic evolution of the Gulf of Mexico, Caribbean and northern South America in the mantle reference frame: An update (2009) The Origin and Evolution of the Caribbean Plate, pp. 1-55. , K. H. James, M. A. Lorente, and J. L. Pindell, The Geological Society of London
- Pindell, J.L., Kennan, L., Maresch, W.V., Stanck, K.P., Draper, G., Higgs, R., Plate-kinematics and crustal dynamics of circum-Caribbean arc-continent interactions: Tectonic controls on basin development in proto-Caribbean margins (2005) Geological Society of America, 394, pp. 7-52
- Stainforth, R.M., The concept of sea-floor spreading applied to Venezuela:Asociación Venezolana Geología, Minería y Petróleo (1969) Boletín Informativo, 12, pp. 257-274
Citas:
---------- APA ----------
Alfaro, E.S., Barrera, D.F. & Rossello, E.
(2012)
. Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin. Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012, 1156-1160.
http://dx.doi.org/10.1190/segam2012-0313.1---------- CHICAGO ----------
Alfaro, E.S., Barrera, D.F., Rossello, E.
"Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin"
. Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012
(2012) : 1156-1160.
http://dx.doi.org/10.1190/segam2012-0313.1---------- MLA ----------
Alfaro, E.S., Barrera, D.F., Rossello, E.
"Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin"
. Society of Exploration Geophysicists International Exposition and 82nd Annual Meeting 2012, SEG 2012, 2012, pp. 1156-1160.
http://dx.doi.org/10.1190/segam2012-0313.1---------- VANCOUVER ----------
Alfaro, E.S., Barrera, D.F., Rossello, E. Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin. Soc. Explor. Geophys. Int. Expo. Annu. Meet., SEG. 2012:1156-1160.
http://dx.doi.org/10.1190/segam2012-0313.1