Tectonic evolution and hydrocarbon prospectivity of Nigerian Frontier Grabens of Dahomey Basin from interpretation of new aeromagnetic and existing seismic and geophysical data
Three major oceanic fracture zones, interpreted from new aeromagnetic data, intersect the Dahomey basin and extend farther inland as northeast-trending faults. Aeromagnetic anomalies running northwest across the Dahomey embayment delimit two main grabens separated by a horst; the seaward end of all of these are terminated by a northeast-trending offshore trough. The northwest-southeast grabens are interpreted as being underlain by continental crust basements but the northeast-southwest graben seems to be underlain by oceanic crust. The northwest graben (the Ikorodu or Ogun River Trough) is intersected farther seaward by a northeast-trending graben (the offshore Lagos-Badagry Trough) in the shape of a southwest-facing reflection of the letter L. The smaller and shallower Ise graben (inferred by previous investigators) continues colinearly with the major northeasterly graben. The main problems in the exploration of the Nigerian portion of the Dahomey basin include lack of drilling density, especially in the poorly mapped coastal area, and difficulty of acquisition of marine data in the shallow-water area of the Gulf of Guinea cul-de-sac.
- OSTI ID:
- 6805834
- Report Number(s):
- CONF-880301-
- Resource Relation:
- Conference: Annual meeting of the American Association of Petroleum Geologists, Houston, TX, USA, 20 Mar 1988
- Country of Publication:
- United States
- Language:
- English
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NATURAL GAS DEPOSITS
TECTONICS
NIGERIA
PETROLEUM DEPOSITS
AERIAL SURVEYING
CRETACEOUS PERIOD
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KEROGEN
MAGNETIC SURVEYS
PALEONTOLOGY
RESERVOIR ROCK
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