Deltas of the Lake Malawi Rift, East Africa: seismic expression and exploration implications

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51 Scopus citations

Abstract

High-resolution seismic reflection surveys over the offshore regions of five river deltas in Lake Malawi in the East African rift system reveal considerable variability in acoustic facies and stratigraphic architecture. This variability can largely be attributed to the influences of different structural settings, and to a lesser degree to high-amplitude and high-frequency fluctuations in lake level. Deltas on flexural and axial margins in the rift lake show well-developed progradational geometries. In contrast, a delta on a steep, accommodation zone margin distributes coarse sediments over a broad depositional apron, rather than concentrating sediment in discrete progradational lobes as on the other deltas. Flexural margin lowstand deltas may be the most prospective for hydrocarbon exploration due to their large, internally well-organized, progradational lobes and their close proximity to deep-water, high total organic carbon lacustrine source facies. -from Author

Original languageEnglish (US)
Pages (from-to)1679-1697
Number of pages19
JournalAmerican Association of Petroleum Geologists Bulletin
Volume79
Issue number11
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Geology
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)

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