Moulin, Maryline et al. (2012): Kinematic keys of the Santos-Namibe basins

Leg/Site/Hole:
Identifier:
2012-040029
georefid
10.1144/SP369.3
doi
Creator:
Moulin, Maryline
Instituto Dom Luiz, Lisbon, Portugal
author
Aslanian, Daniel
Ifremer, France
author
Rabineau, Marina
IUEM, France
author
Patriat, Martin
author
Matias, Luis
author
Identification:
Kinematic keys of the Santos-Namibe basins
2012
In: Mohriak, Webster Ueipass (editor), Danforth, A. (editor), Post, Paul J. (editor), Brown, D. E. (editor), Tari, G. C. (editor), Nemcok, M. (editor), Sinha, S. T. (editor), Conjugate divergent margins
Geological Society of London, London, United Kingdom
369
Understanding the genesis of the very peculiar 600 km-wide Santos Basin-Sao Paulo Plateau system and its narrow conjugate Namibe Margin is a kinematic and structural problem. Several hypotheses have been proposed in order to explain the genesis of this system that imply the same amount of horizontal movement. We investigate the consequences of the horizontal movement in the Santos Basin, based in plate kinematic reconstructions. The kinematic history of this system that we present here, based on the interpretation of seismic profiles and kinematic constraints, has the following consequences: (1) there is no evidence of a ridge jump sensu stricto but, rather, a southwards propagation in the Central Segment of the South Atlantic that starts in the northern part, between the NE Brazilian and Gabonese margins; (2) the Namibe margin evolved as a transform passive margin; (3) the opening direction of the Santos Basin-Sao Paulo Plateau system is oblique to the general opening motions of the South American and African plates; and (4) this opening is younger (6 Ma) than those of the other basins of the Central Segment of the South Atlantic.
English
Serial
Coverage:Geographic coordinates:
North:-20.0000
West:-43.0000East: -40.0000
South:-25.0000
Solid-earth geophysics; Applied geophysics; Africa; African Plate; Atlantic Ocean; basement; basin analysis; basins; Brazil; Central Africa; continental lithosphere; Cretaceous; crust; elastic waves; fracture zones; Gabon; geophysical methods; geophysical surveys; Gondwana; kinematics; lithosphere; Mesozoic; Mohorovicic discontinuity; Namibe Basin; Namibia; oblique orientation; Ocean Drilling Program; oceanic crust; oceanic lithosphere; offshore; paleogeography; passive margins; petroleum; petroleum exploration; plate tectonics; rifting; Santos Basin; Sao Paulo Plateau; sedimentary basins; seismic methods; South America; South American Plate; South Atlantic; Southern Africa; surveys; tectonics; traveltime;
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