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Three-dimensional geometry and displacement configuration of a fault array from a raft system, Lower Congo Basin, Offshore Angola: implications for the Neogene turbidite play

By
David M. Dutton
David M. Dutton
Department of Earth Sciences and Engineering, Imperial College, RSM Building, Prince Consort Road, South Kensington, London SW7 2BP, UK (e-mail: david.dutton@ic.ac.uk)Present address:CNR International UK Ltd, St Magnus House, Guild Street, Aberdeen ABU 6NJ, UK (e-mail: david.dutton@cnrinternational.com)
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Dustin Lister
Dustin Lister
Department of Earth Sciences and Engineering, Imperial College, RSM Building, Prince Consort Road, South Kensington, London SW7 2BP, UK (e-mail: david.dutton@ic.ac.uk)Present address:WesternGeco, Schlumberger House, Buckingham Gate, Gatwick Airport, West Sussex RH6 ONZ, UK
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Bruce D. Trudgill
Bruce D. Trudgill
Department of Earth Sciences and Engineering, Imperial College, RSM Building, Prince Consort Road, South Kensington, London SW7 2BP, UK (e-mail: david.dutton@ic.ac.uk)Present address:Colorado School of Mines, Illinois 1500 Street, Golden, CO 80401-1887, USA
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Kapela Pedro
Kapela Pedro
Sonangol DPP, Rua 1° Congresso do MPLA, N.° 8-16, Caixa Postal 1316, Luanda, Republica de Angola
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Published:
January 01, 2004

Abstract

We investigate fault growth and linkage during development of a rafted terrain in the Lower Congo Basin, offshore Angola. Miocene thin-skinned extension has led to the development of isolated raft blocks separated by a graben filled with syn-deformational strata. Angular unconformities together with thinning and onlapping of intra-raft strata onto salt bodies suggest that thick salt was mobile during thin-skinned extension. 3D fault array geometries and displacement patterns record the subsequent deformation history of the graben during further thin-skinned extension. The mode of thin-skinned extension has important consequences for the Neogene turbidite hydrocarbon play associated with the rafted province of the Lower Congo Basin. The presence of thick mobile salt will influence pre-salt source rock maturation and the development of pre-salt/post-salt hydrocarbon migration windows.

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Contents

Geological Society, London, Memoirs

3D Seismic Technology: Application to the Exploration of Sedimentary Basins

Richard J. Davies
Richard J. Davies
Cardiff University, UK
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Joseph A. Cartwright
Joseph A. Cartwright
Cardiff University, UK
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Simon A. Stewart
Simon A. Stewart
BP, Azerbaijan
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Mark Lappin
Mark Lappin
ExxonMobil Exploration Company, USA
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John R. Underhill
John R. Underhill
The University of Edinburgh, UK
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Geological Society of London
Volume
29
ISBN electronic:
9781862394049
Publication date:
January 01, 2004

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