Bathymetry, Chirp and Deep Crustal Structure of the Santos Basin SÃO Paulo Ridge Complex (sbspr)
Abstract
The SanBa (Santos Basin- Seismic Research experiment) research experiment is a joint project of the Department of Marine Geosciences (IFREMER: Institut Français de Recherche pour l'Exploitation de la MER, France), the Laboratory of "Oceanic Domain" (Institut Universitaire et Européen de la Mer, France), the Faculdade de Ciências da Universidade de Lisboa (Lattex and CGUL, Portugal), the Universidade de Brasilia (Brazil) and PETROBRAS. Its aim is to test hypotheses that have been proposed such as the existence of failed rift and a micro-block (Moulin et al., GSL submitted) or the presence of exhumed mantle on its south-eastern part (Zalan et al., AAPG 2009). Six wide-angle seismic data were acquired together with coincident deep frequency reflection seismic data during the SanBa cruise in Dec 2010 - Jan. 2011 (total > 850 Nm). Chirp and Bathymetry were also acquired during the cruise. The preliminary results suggest a very thin crust (< 5km) in the center and in the south-eastern part of the SBSPR. Both refraction and reflection data present a clear signal of the Moho in the distalmost part of the study area, which seems to preclude the exhumed mantle hypothesis."
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.T23B2388A
- Keywords:
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- 3025 MARINE GEOLOGY AND GEOPHYSICS / Marine seismics;
- 3040 MARINE GEOLOGY AND GEOPHYSICS / Plate tectonics;
- 8105 TECTONOPHYSICS / Continental margins: divergent;
- 8106 TECTONOPHYSICS / Continental margins: transform