1887

Abstract

Summary

Examples of slope channels being diverted/deflected by growth folds, salt walls or thrusts are found at the modern seabed and in the subsurface in deep-water fold and thrust belts. We have quantified the shortening rate of thrust-related folds, salt-cored anticlines and faulted salt-detachment folds in three areas (Gulf of Mexico, Lower Congo Basin and Niger Delta), with the aim of investigating whether there are any predictive relationships between structural parameters such as structural relief, growth rate versus sediment accumulation rate, and depositional patterns.

Shortening rates in the Niger Delta and t the Gulf of Mexico are comparable. The maxima recorded for the West African salt strutures are lower. However we note that the Pleistocene to Recent channels in the Niger Delta, and the buried Miocene channels in West Africa, are diverted and deflected. by growth rates as low as 30–50 m/Ma. In general, during periods of higher growth, channels are forced to deflect or divert around growing structures. Channels that have established a route through a fold or salt wall can continue to exploit that route down slope as long as the turbidity flows continue to have enough erosive power to keep pace with the growth of the structure.

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/content/papers/10.3997/2214-4609.201900864
2019-06-03
2024-03-29
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References

  1. Clark, I.R., and Cartwright, J.A.
    [2011]. Key controls on submarine channel development in structurally active settings. Marine and Petroleum Geology, 28, 1333–1349.
    [Google Scholar]
  2. Corredor, F., Shaw, J.H. and Bilotti, F.
    [2005]. Structural styles in the deep-water fold and thrust belts of the Niger Delta. AAPG Bulletin, 89, 753–780
    [Google Scholar]
  3. Dahlstrom, C.D.A.
    [1969]. Balanced cross sections: Canadian Journal of Earth Sciences, 6, 743–757.
    [Google Scholar]
  4. Diegel, F. A., et al.
    [1995], Cenozoic structural evolution and tectono-stratigraphic framework of the northern Gulf coast continental margin, in M. P. A.Jackson, eds., Salt tectonics: a global perspective: AAPG Memoir65, 109–151
    [Google Scholar]
  5. Doughty-Jones, G. Mayall, M. & LonerganL.
    [2017]. Stratigraphy, facies and evolution of deep-water lobe complexes within a salt-controlled intra-slope mini-basin. AAPG Bull. 101, 1879–1904.
    [Google Scholar]
  6. Gee, M.J.R. Gawthorpe, R.L.
    [2006]. Submarine channels controlled by salt tectonics: examples from 3D seismic data offshore Angola. Mar. Petrol. Geol., 23, 443–458
    [Google Scholar]
  7. Higgins, S., Clarke, B., et al.
    , [2009]. Internal geometry and growth history of a thrust-related anticline in a deep-water fold belt. Journal of Structural Geology, 31, 1597–1611.
    [Google Scholar]
  8. Jolly, B.A. Whittaker, A.C. Lonergan, L.
    [2017] Quantifying the geomorphic response of modern submarine channels to actively growing folds and thrusts, deep-water Niger Delta. Geological Society of America Bulletin. doi: 10.1130/B31544.1
    https://doi.org/10.1130/B31544.1 [Google Scholar]
  9. Jolly, B.A. Lonergan, L.Whittaker, A.C.
    [2016]. Growth history of fault-propagation folds and interaction with seabed channels in the toe-thrust region of the deep-water Niger Delta; Marine and Petroleum Geology70, 58–76.
    [Google Scholar]
  10. Jones, G., Mayall, M., and Lonergan, L.
    [2012] Contrasting depositional styles on a slope system and their control by salt tectonics - through-going channels, ponded fans and mass transport complexes. in 32nd Annual GCSSEPM Foundation Bob F. Perkins Research Conference “New Understanding of the Petroleum Systems of Continental Margins of the World”’ Conference proceedings, p.503–533 (DVD).
    [Google Scholar]
  11. Huyghe, P., et al
    [2004]. Channel profiles through the active thrust front of the southern Barbados prism. GSA Bulletin, 32, 429–432.
    [Google Scholar]
  12. Marton, L.G. Tari, G.C. and LehmannC.T.
    [2000], Evolution of the Angolan passive margin, West Africa, with emphasis on post-salt structural styles in W.U.Mohriak and M.Talwani, eds, Atlantic Rifts and Continental Margins: American Geophysical Union Monograph, 115, 201–225.
    [Google Scholar]
  13. Mayall, M. Lonergan, L. et al.
    , [2010]. The response of turbidite slope channels to growth-induced seabed topography. AAPG Bulletin, 94, 1011–1030.
    [Google Scholar]
  14. Morley, C.K.
    , [2009]. Growth of folds in a deep-water setting. Geosphere, 5, 59–89.
    [Google Scholar]
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