Cretaceous Rift System of Western Central Africa

This 2005 Regional Report investigates the structural architecture, development and extent of the Cretaceous rift basins of Western Central Africa. It was carried out in collaboration with Dr Rene Guiraud, emeritus Professor at Montpelier University, France; a specialist in the region, with over 300 papers and publications.

Building on Getech’s regional gravity and magnetic data covering the basins, the report included 2D gravity modelling across the rifts and a depth-to-basement gravity inversion, controlled in places with seismic data. The report comprises five technical reports (one Regional Overview Volume and four Detailed Module Volumes) and ArcGIS™ deliverables.

The Regional Overview Volume discusses the close relationship between the stresses related to the opening of the Atlantic Ocean, as revealed in the gravity data, and the deformation phases of the inland rift basins, as described by their stratigraphy. The Detailed Module Volumes contain geophysical interpretations of the gravity and magnetic data, including 2D modelling, lineament and structural analysis, and a depth-to-basement map.

The Cretaceous Rift System of Western Central Africa area of interest“…investigates the structural architecture, development and extent of the Cretaceous rift basins of Western Central Africa.”

Deliverables

  • 368 page report in five volumes, with 275 figures and tables
  • An ArcGIS™ mxd project and geodatabase v10.x (earlier versions available on request)

All products supplied subject to our standard Licence Agreement (available on request).

This Regional Report investigates…

…depth-to-basement in the basins.

…the influence of Atlantic opening on the polyphase deformation history of the rifts.

…structural lineaments and their control on basin geometry.

The Detailed Module Volumes

Module 1: Logone Birni, Bongor, Doseo, Doba and Salamat Basins.

Module 2: Upper Benue, Gongola and Yola-Garoua Basins

Module 3: Termit, Lake Chad and N’gel Edji Basins

Module 4: Tefidet, Ténéré, Grein, Bilma and Kafra Basins

Gravity and Magnetic Data

The underlying gravity and magnetic data for Niger, Chad, northern Nigeria, Cameroon and Central African Republic which are used in this Regional Report are included as images. Grids are also available and can be included with the report for a small additional cost.

Gravity images are created from a 10 km grid of Bouguer anomaly derived from all available gravity stations. Magnetic images are created from a 1 km grid of total magnetic field, derived from dozens of discrete airborne surveys that have been reprocessed and merged by Getech.

Report Contents

Overview Volume:

  • Introduction and Scope of Study
  • Data used in the Study
  • Plate Tectonic Influence on Western Central African Rift Development
  • The Poly-Phase Evolution of the Western Central African Rift System
  • Geophysical Interpretation
  • Interpreted Areas (overview of the available Detailed Module Volumes)
  • Bibliography
  • Appendix 1: ArcGIS™ Contents

Each Detailed Module Volume:

  • Introduction
  • Modelling (discussion of 2D gravity and magnetic modelling for 16 profiles)
  • Interpreted Structural Elements – Discussion
  • Depth-to-Basement Mapping

ArcGIS™ Contents

  • Cultural data
  • Basin outlines
  • Well and seismic, and geological cross-section locations
  • Images of gravity and magnetic data, derivatives and transforms
  • Satellite imagery
  • Sixteen 2D gravity and magnetic profiles hyperlinked to PDFs
  • Eleven 2D regional gravity profiles for Moho modelling hyperlinked to PDFs
  • Structural interpretation
  • Depth-to-basement (grid and images)

Related Products

If this Regional Report is of interest then you may also wish to know more about the following Getech products:

Geodynamics and Petroleum Geology of the Taoudenni Basin
Gravity and magnetic data in:

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