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- W2620784077 abstract "Sediment delivery to the abyssal regions of the oceans is an integral process in the source to sink cycle of material derived from the hinterland. How sediments are transported down-slope, and where they are deposited has implications for the mass balance of the upper lithosphere, hydrocarbon reserves, climate archives and sequence stratigraphic models. The Zambezi River, the largest in southern Africa, delivers vast amounts of material to the continental shelf, submarine Sofala/Zambesia Bank. The Sofala/Zambesia Bank acts as a staging area for this riverine input prior to its redistribution toward the abyssal plains of the Mozambique Channel. Much ofthis material is said to be directed into the submarine Zambezi Valley and Channel. Until this study, however,the sediment transfer routes between the Sofala/Zambesia Bank and abyssal plains of the Mozambique Channelhave been quite poorly understood and remain unconstrained. The aim of this contribution is to better constrainsediment transport pathways to the abyssal plains using the latest, regional, high resolution multibeam bathymetrydata available, taking into account the effects of bottom water circulation, antecedent basin morphology and sealevel change. Results show that sediment transport and delivery to the abyssal plains is discreetly partitionedinto southern, central and northern domains. This sediment partitioning is primarily controlled by changes incontinental shelf and shelf break morphology under the influence of a dynamic anticyclonic inshore circulationsystem. However, changes in base level have an overarching control on sediment delivery to particular domains at various sea levels. A direct consequence of these controlling factors is limited sediment delivery to the submarine Zambezi Valley and Channel under present-day conditions, with increased activity envisaged during regression.Furthermore, the “on-off” switching of discrete domains along strike is a sequence stratigraphic concept generallynot previously considered in the shelf-slope-abyssal continuum. The proposed sediment transport routes, undervaried sea level scenarios, provide a framework which relates shallow to mid depth studies with those focused onthe deep regions of the Mozambique Channel providing the first inclusive account of shelf to abyssal sedimenttransport in the region." @default.
- W2620784077 created "2017-06-09" @default.
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- W2620784077 date "2016-04-18" @default.
- W2620784077 modified "2023-09-26" @default.
- W2620784077 title "Zambezi continental margin: allocyclic and antecedent controls onsediment transport in the Mozambique Channel." @default.
- W2620784077 hasPublicationYear "2016" @default.
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