Deformaciones Neógenas y diapirismo arcilloso en el sector nororiental del Prisma de Acreción del Golfo de Cádiz
- Ilson Nunes-Rubim 1
- Álvaro Carrión-Torrente 1
- José Luis Sánchez-Roldán 1
- 1 Universidad de Granada, España
ISSN: 0213-683X
Year of publication: 2017
Issue Title: Comunicaciones presentadas en la LXII Sesión Científica / Guadalupe, 25 de Mayo de 2017
Issue: 62
Pages: 27-30
Type: Article
More publications in: Geogaceta
Abstract
The Gulf of Cádiz is situated over the Eurasian-African plate boundary, which is characterized by an oblique NW-SE convergence. This work examines the deformation of the sedimentary cover on the northeastern sector of the accretionary wedge of the Gulf of Cadiz (AWGC), characterized by shale and salt diapirs. We analyze the distribution of shale diapirs and their relationship with structures affecting the supra-AWGC sedimentary sequence from the Middle Miocene to present. Using commercial multi-channel 2D seismic lines and four oil wells, we have identified three seismic-stratigraphic units above the PAGC (Pleistocene, Pliocene and Middle-Upper Miocene). It is presented a structural map with growth normal faults associated down-slope with SSW-NNE shale diapirs and troughs. The overall structure is probably formed by a left-lateral transpression deformation since the Middle Miocene with gravitational gliding above the AWGC.