4
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Inherited morphobathymetric controls over contourite drift deposition: A case study from the late Cenozoic Mentelle Basin, Australia

      1 , 2 , 1
      Interpretation
      Society of Exploration Geophysicists

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Deep-sea sedimentary deposits are important archives of the geologic past that preserve the records of past environmental changes in earth’s ocean. The detailed analysis of deep-sea sedimentary archives, in particular of contourite drifts, can help elucidate past changes in ocean circulation and the stratigraphic evolution of continental margins. However, the bathymetric profile of an oceanic basin can shape and modify the architecture of contourite drifts via the interaction between down-slope and along-slope processes. The identification of local bathymetric influence on depositional architectures is therefore important to help decipher local versus regional influences on deep-sea sedimentary signatures. Seismic data from Mentelle Basin in the southeast Indian Ocean integrated with deep-sea core data reveal a calcareous-siliciclastic mixed contourite-turbidite system developed during the late Cenozoic, starting in the middle Miocene. Current winnowing led to the formation of regional hiatuses, ferromanganese crusts, and siliciclastic lag deposits. The main locus of sediment deposition occurred on the shallower parts of the basin, whereas sediment preservation remained low in the deeper areas. Seismic analysis shows that inherited topography influenced the architecture of contourite deposits within the basin, with elongate-mounded and sheeted drifts forming preferentially at shallower depths on the continental slope and the Naturaliste Plateau, while channel incision occurred in the deepest parts of the basin. These results suggest that the intensification of current transport occurred preferentially within the deeper and spatially constrained parts of the basin, whereas current deflection around the slope and plateau enhanced drift deposition and preservation at shallower depths. Therefore, the basin topography at the time of deposition controlled the distribution of deep-sea deposits and drift morphologies within the mixed contourite-turbidite system in the Mentelle Basin.

          Related collections

          Most cited references74

          • Record: found
          • Abstract: not found
          • Article: not found

          Ocean Basin Evolution and Global-Scale Plate Reorganization Events Since Pangea Breakup

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Contourites and associated sediments controlled by deep-water circulation processes: State-of-the-art and future considerations

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Deep-sea current evidence from abyssal sediments

                Bookmark

                Author and article information

                Contributors
                Journal
                Interpretation
                Interpretation
                Society of Exploration Geophysicists
                2324-8858
                2324-8866
                August 01 2021
                June 15 2021
                August 01 2021
                : 9
                : 3
                : T637-T652
                Affiliations
                [1 ]The University of Texas at Austin, Institute for Geophysics, John A. and Katherine G. Jackson School of Geosciences, Austin, Texas 78758, USA.(corresponding author).
                [2 ]The University of Adelaide, Australian School of Petroleum and Energy Resources, Adelaide, SA 5005, Australia..
                Article
                10.1190/INT-2020-0131.1
                69fd9361-8cfa-49af-8aec-a13352ee1b57
                © 2021
                History

                Comments

                Comment on this article