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• W2332147256 abstract "PreviousNext No AccessSEG Technical Program Expanded Abstracts 2012Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basinAuthors: Alfaro S. EstebanF. Barrera DiegoRossello EduardoAlfaro S. EstebanGrupo de Estratigrafia Teórica e Aplicada, Universidade Federal da BahiaSearch for more papers by this author, F. Barrera DiegoGrupo de Geofisica Computacional, Universidade Estadual de CampinasSearch for more papers by this author, and Rossello EduardoCONICET - FCEN, Universidad de Buenos AiresSearch for more papers by this authorhttps://doi.org/10.1190/segam2012-0313.1 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail 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, dodownlap 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. Permalink: https://doi.org/10.1190/segam2012-0313.1FiguresReferencesRelatedDetails SEG Technical Program Expanded Abstracts 2012ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2012 Pages: 4609 Publisher:Society of Exploration Geophysicists HistoryPublished: 25 Oct 2012 CITATION INFORMATION Esteban Alfaro S., Diego F. Barrera, and Eduardo Rossello, (2012), Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin, SEG Technical Program Expanded Abstracts : 1-5. https://doi.org/10.1190/segam2012-0313.1 Plain-Language Summary PDF DownloadLoading ..." @default.
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• W2332147256 title "Diachronic Cenozoic wrenching and an Eocene unconformity in southwest of the Colombian basin" @default.
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