Response of Cenozoic turbidite system to tectonic activity and sea-level change off the Zambezi Delta

Castelino, Jude A.; Reichert, Christian; Jokat, Wilfried

doi:10.1007/s11001-017-9305-8

Cited by 16 publications

(7 citation statements)

References 47 publications

(88 reference statements)

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“…Sedimentation in the Mozambique Channel and Basin is bounded in the north and west by the African continent and the Mozambique Ridge, and in the east by Madagascar and the Davie Ridge (Castelino et al, 2017;Fig. 1).…”

Section: Journal Pre-proofmentioning

confidence: 99%

Contourite and mixed turbidite-contourite systems in the Mozambique Channel (SW Indian Ocean): Link between geometry, sediment characteristics and modelled bottom currents

et al. 2021

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Section: Journal Pre-proofmentioning

confidence: 99%

Contourite and mixed turbidite-contourite systems in the Mozambique Channel (SW Indian Ocean): Link between geometry, sediment characteristics and modelled bottom currents

et al. 2021

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“…Hence, the classification can be used to infer paleo-environment, paleo-geographic location and dimensions of the related submarine conduit from observed geomorphic features and geometry (e.g., Konsoer et al, 2013;Castelino et al, 2017;Harishidayat et al, 2018).…”

Section: Distribution Of Sediment Conduit Types Along Continental Mar...mentioning

confidence: 99%

Geomorphic variability of submarine channelized systems along continental margins: Comparison with fluvial meandering channels

Lemay

Grimaud

Cojan

et al. 2020

Marine and Petroleum Geology

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“…The sedimentary deposits in the Mozambique Channel are bounded in the north and west by the Mozambican margin, and in the east by the Madagascar margin and the Davie Ridge (Castelino et al, 2017). The Zambezi is the main river delivering sediment to the basin, which, with a catchment area of 1.4•10 6 km 2 (Walford et al, 2005), is one of the largest fluvial systems in SE Africa.…”

Section: Geological Settingmentioning

confidence: 99%

The influence of bottom currents on the Zambezi Valley morphology (Mozambique Channel, SW Indian Ocean): In situ current observations and hydrodynamic modelling

et al. 2019

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Mixed turbidite-contourite systems can be found in oceans where bottom currents and turbidity currents interact. The Zambezi turbidite system, located in the Mozambique Channel (SW Indian Ocean), is one of the largest sedimentary systems in the world in length and area of the related catchments. The oceanic circulation in the Mozambique Channel is intense and complex, dominated by eddies flowing southwards and deep currents flowing northwards along the Mozambican margin. Current measurements obtained from moorings at 3400-4050 m water depth in the Zambezi and Tsiribihina valleys show periods of intense currents at the seafloor with peaks of 40-50 cm s−1 that last up to one month and are not related to turbidity currents. These strong bottom-current events are correlated with a change in current direction and an increase in temperature. The periods of current intensification may be related to eddies, since they present similar frequencies (around 7 per year). Moreover, modelling results show that during periods of intense deep circulation an anticyclonic eddy is present between the Mozambican slope and the centre of the Mozambique Channel, which may block the northward transport of the deep water mass and thus enhance the southward transport along the western slope of Madagascar. According to our hydrodynamic modelling of the circulation near the seafloor, intense currents are often present along the Zambezi Valley, especially along the valley flanks. Multi-channel seismic reflection data show that the Zambezi turbidite system does not show the typical characteristics of turbidite systems, being dominated by erosional processes, which mainly affect the valley flanks. Levees associated with the valley are absent in the main axis of the system. The effect of bottom currents on sedimentation in the basin is evidenced by the low sedimentation rates that witness winnowing in the basin, the presence of contouritic sand in the Zambezi Valley flanks and the abundance of current-related bedforms observed in multibeam bathymetry and seismic data. The intense oceanic processes observed in the Mozambique Channel may transport a large part of the fine sediment out of the basin and erode the seafloor even at great depths. Therefore, the Zambezi turbidite Highlights ► In situ measurements and modelling show strong currents along the Zambezi Valley. ► Measured bottom currents in the Zambezi and Tsiribihina Valleys reach 53 cm s −1. ► Eddies block the Mozambique Undercurrent, enhancing southward flow along the valley. ► Bottom currents erode the Zambezi Valley flanks and control its morphology.

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Response of Cenozoic turbidite system to tectonic activity and sea-level change off the Zambezi Delta

Abstract: is strongly linked to onshore tectonic events and the variations in sea level and sediment flux.

Cited by 16 publications

References 47 publications

Contourite and mixed turbidite-contourite systems in the Mozambique Channel (SW Indian Ocean): Link between geometry, sediment characteristics and modelled bottom currents

Contourite and mixed turbidite-contourite systems in the Mozambique Channel (SW Indian Ocean): Link between geometry, sediment characteristics and modelled bottom currents

Geomorphic variability of submarine channelized systems along continental margins: Comparison with fluvial meandering channels

The influence of bottom currents on the Zambezi Valley morphology (Mozambique Channel, SW Indian Ocean): In situ current observations and hydrodynamic modelling

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