Sediment deposition and preservation in mouth bar complexes of prograding deltas
H. van der van Der Vegt (TU Delft - Applied Geology)
J.E.A. Storms (TU Delft - Applied Geology)
D.J.R. Walstra (TU Delft - Coastal Engineering, Deltares)
L. Li (TU Delft - Applied Geology)
Kjetil Nordahl (Statoil Research Centre)
A.W. Martinius (TU Delft - Applied Geology, Statoil Research Centre)
N.C. Howes (Shell)
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Abstract
In deltaic deposits, the largest volumes of sandy deposits occur at the delta top (as channel accretion, overbank deposits) and as distinct or amalgamated sandy mouth bars in the upper delta front. We use process-based models to study the sediment distribution in four evolving deltas, each with a different input sediment profile. We show how the mouthbar deposits can preserve a large proportion of the sand preserved in the sedimentary record of deltaic systems.