Structural and stratigraphic variability of the African margin of the Equatorial Atlantic - INSU - Institut national des sciences de l'Univers Access content directly
Conference Papers Year : 2014

Structural and stratigraphic variability of the African margin of the Equatorial Atlantic

Jing Ye
  • Function : Author
  • PersonId : 763252
  • IdRef : 185643221
Delphine Rouby
Damien Huyghe
Olivier Broucke
  • Function : Author
François Guillocheau
  • Function : Author
  • PersonId : 840693
Cecile Robin
  • Function : Author

Abstract

The Transform Source to Sink Project (TS2P) objective is to link the evolution of the sedimentary basins of the African margin of the Equatorial Atlantic and their source areas developing on West African Craton. The Equatorial Atlantic segment varies from a normal passive margin in the North-West (Guinea), to an oblique margin (Sierra Leone and Liberia) and to a transform margin (Ivory Coast and Ghana). This evolution is associated with variation in the margin width, continental relief, drainage organization and subsidence/accumulation patterns that we analyzed using seismic data and onshore geology. We compare syn-rift geometry and long-term stratigraphic history of each of these segments. Preliminary results in Sierra Leone and Liberia segment show that syn-rift geometries (Lower Cretaceous) are increasingly influenced by transform faults toward the South-East and the immediate post-rift Upper Cretaceous wedge is associated with a marine transgression and reactivation of transform faults. These results will then be used to estimate sediment budgets and integrated in a sourceto- sink analysis where onshore denudation will be estimated by low- Temperature thermochronology

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Earth Sciences
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Dates and versions

insu-01080755 , version 1 (06-11-2014)

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  • HAL Id : insu-01080755 , version 1

Cite

Jing Ye, Delphine Rouby, Dominique Chardon, Damien Huyghe, Olivier Broucke, et al.. Structural and stratigraphic variability of the African margin of the Equatorial Atlantic. 24 ème Réunion des sciences de la Terre 2014, Oct 2014, Pau, France. pp.153. ⟨insu-01080755⟩
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