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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
1
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)
3
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
1
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)
4
Present address:
WesternGeco, Schlumberger House, Buckingham Gate, Gatwick Airport
,
West Sussex RH6 ONZ, UK
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Bruce D. Trudgill
Bruce D. Trudgill
1
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)
5
Present address:
Colorado School of Mines
,
Illinois 1500 Street, Golden, CO 80401-1887, USA
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Kapela Pedro
Kapela Pedro
2
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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