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https://hdl.handle.net/10316/15200
Title: | Estratigrafia sísmica do Cenozóico na plataforma continental algarvia: interpretação do controle tectónico da sedimentação | Authors: | Lopes, Fernando C. Cunha, P. Proença |
Keywords: | Algarve; Plataforma continental; Cenozóico; Estratigrafia sísmica; Tectónica; Análise de bacias | Issue Date: | 2000 | Publisher: | Universidade Nova de Lisboa | Citation: | Lopes, F.C.; Cunha, Pedro P.Estratigrafia sísmica do Cenozóico na plataforma continental algarvia: interpretação do controle tectónico da sedimentação, Ciências da Terra (UNL), 14, 257-276, 2000. | Serial title, monograph or event: | Ciências da Terra (UNL) | Issue: | 14 | Place of publication or event: | Lisboa | Abstract: | The interpretation of 64 seismic reflection profiles in the Algarve continental platform (36º 20'-37º 00' paralels and 7º 20'-8º 40' meridians) calibrated with five petroleum exploration wells, with the identification of the geometric relations between six Cenozoic seismic units (B to G) and tectonic structures, allowed the construction of sucessive time-isopach maps (twt/s) and detailed interpretation of the geologic evolution. Two major tectonic structures were identified: a) the Portimão-Monchique fracture zone (striking N-S); b) an off-shore NW-SE fault zone, probably the S. Marcos-Quarteira fault. This accident separates two tectonic domains: the western domain (with N-S and E-W predominant structures and, secondarily, NW-SE and NE-SW) and the eastern domain (dominated by WSW-ENE, NW-SE, NE-SW, NNE-SSW and NNW-SSE structures). A persistent halokinetic activity had two major moments: a) sin-C unit; b) sin- and post-E unit. An increasing flexuration of the margin was identified, with spacial and temporal variation of the subsidence. The tectonic regime is considered as generally compressive, but the interpretation of the successíve stress-fields is rendered dificult by the existence of tectonic sub-domains and evaporitic structures. | URI: | https://hdl.handle.net/10316/15200 | ISSN: | 0254-055X | Rights: | openAccess |
Appears in Collections: | I&D CGUC - Artigos em Revistas Nacionais FCTUC Ciências da Terra - Artigos em Revistas Nacionais |
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Estratigrafia sísmica do Cenozóico.pdf | 3.72 MB | Adobe PDF | View/Open |
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