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Drainage and Sedimentary Responses to Dynamic Topography

Journal Article


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Abstract


  • Dynamic topography due to mantle flow contributes to shaping Earth's evolving landscapes by affecting sediment routing, which has rarely been explored in source-to-sink contexts. Here we design a generic model to investigate the impact of dynamic topography on both landscape evolution and stratigraphic formations. An imposed wave of dynamic topography propagates laterally under a fixed continent, exerting transient surface uplift and subsidence. We find that a migrating dynamic topography can induce significant drainage reorganizations and affect sediment routing from source to sink. Variations in sediment supply driven by the lateral migrating dynamic topography contribute to the formation of diachronous unconformities along the margin. The predicted sediment flux histories are then put into perspective with the Cretaceous sedimentary records along the Southern African margins. Finally, we demonstrate that correlating offshore depositional hiatuses and unconformities has the potential to constrain the spatiotemporal evolution of past dynamic topography events.

Authors


  •   Ding, Xuesong (external author)
  •   Salles, Tristan (external author)
  •   Flament, Nicolas
  •   Mallard, Claire (external author)
  •   Rey, Patrice F. (external author)

Publication Date


  • 2019

Citation


  • Ding, X., Salles, T., Flament, N., Mallard, C. & Rey, P. F. (2019). Drainage and Sedimentary Responses to Dynamic Topography. Geophysical Research Letters, Online First 1-10.

Scopus Eid


  • 2-s2.0-85077073382

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2123&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/1109

Number Of Pages


  • 9

Start Page


  • 1

End Page


  • 10

Volume


  • Online First

Place Of Publication


  • United States

Abstract


  • Dynamic topography due to mantle flow contributes to shaping Earth's evolving landscapes by affecting sediment routing, which has rarely been explored in source-to-sink contexts. Here we design a generic model to investigate the impact of dynamic topography on both landscape evolution and stratigraphic formations. An imposed wave of dynamic topography propagates laterally under a fixed continent, exerting transient surface uplift and subsidence. We find that a migrating dynamic topography can induce significant drainage reorganizations and affect sediment routing from source to sink. Variations in sediment supply driven by the lateral migrating dynamic topography contribute to the formation of diachronous unconformities along the margin. The predicted sediment flux histories are then put into perspective with the Cretaceous sedimentary records along the Southern African margins. Finally, we demonstrate that correlating offshore depositional hiatuses and unconformities has the potential to constrain the spatiotemporal evolution of past dynamic topography events.

Authors


  •   Ding, Xuesong (external author)
  •   Salles, Tristan (external author)
  •   Flament, Nicolas
  •   Mallard, Claire (external author)
  •   Rey, Patrice F. (external author)

Publication Date


  • 2019

Citation


  • Ding, X., Salles, T., Flament, N., Mallard, C. & Rey, P. F. (2019). Drainage and Sedimentary Responses to Dynamic Topography. Geophysical Research Letters, Online First 1-10.

Scopus Eid


  • 2-s2.0-85077073382

Ro Full-text Url


  • https://ro.uow.edu.au/cgi/viewcontent.cgi?article=2123&context=smhpapers1

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/1109

Number Of Pages


  • 9

Start Page


  • 1

End Page


  • 10

Volume


  • Online First

Place Of Publication


  • United States