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Marine Geophysical Researches

, Volume 25, Issue 3–4, pp 265–282 | Cite as

Improved Seismic Stratigraphy of the Mesozoic Weddell Sea

  • J. Rogenhagen
  • W. Jokat
  • K. Hinz
  • Y. Kristoffersen
Article

Abstract

We present a compilation of more than 45,000 km of multichannel seismic data acquired in the last three decades in the Weddell Sea. In accordance with recent tectonic models and available drillhole information, a consistent stratigraphic model for depositional units W1–W5 is set up. In conjunction with existing aeromagnetic data, a chronostratigraphic timetable is compiled and units W1.5, W2 and W3 are tentatively dated to have ages of between 136 Ma and 114 Ma. The age of W3 is not well constrained, but might be younger than 114 Ma. The data indicate that the thickest sediments are present in the western and southern Weddell Sea. These areas formed the earliest basins in the Weddell Sea and so the distribution of Mesozoic sediments is in accordance with the tectonic development of the ocean basin. In terms of Cenozoic glacial sediments, the largest depocenters are situated in front of the Filchner–Ronne Shelf, i.e. at the Crary Fan, with a thickness of up to 3 km.

Keywords

Antarctica sediment thickness seismic reflection data seismic refraction data seismic stratigraphy Weddell Sea Basin 

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References

  1. Barker, P., Kennett, J. 1988Proc. Ocean Drill. Prog. Init. Reps.Ocean Drilling ProgramCollege Station, Texas113Google Scholar
  2. Cande, S.C., Kent, D.V. 1995Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and CenozoicJ. Geophys. Res.10060936095CrossRefGoogle Scholar
  3. Fütterer, D.K., Kuhn, G., Schenke, H.W. 1990Wegener Canyon bathymetry and results from rock dredging near ODP 691–693, Eastern Weddell Sea, AntarcticaBarker, P.Kennett, J. eds. Proc. Ocean Drill. Prog. Sci. Results 113Ocean Drilling ProgramCollege Station, Texas3947Google Scholar
  4. Ghidella, M., LaBrecque, J.L. 1997The Jurassic conjugate margins of the Weddell Sea: Considerations based on magnetic, gravimetry and paleobathymetry dataRicci, CA eds. The Antarctic region: Geological Evolution and ProcessesTerra Antarctica PublicationSiena441451Google Scholar
  5. Ghidella, M., Yanez, G., LaBrecque, J.L. 2001Revised tectonic implications for the magnetic anomalies of the western Weddell SeaTectonophysics3476586CrossRefGoogle Scholar
  6. Haugland, K., (1982) Seismic reconnaissance in the Weddell Sea. In: Craddock C (ed) Antarctic Geoscience, pp 405–413. Univ. of Wisconsin Press.Google Scholar
  7. Haugland, K., Kristoffersen, Y., Velde, A. 1985Seismic investigations in the Weddell Sea EmbaymentTectonophysics114293313CrossRefGoogle Scholar
  8. Hinz, K. 1981A Hypothesis on terrestrial catastrophes, wedges of very thick oceanward dipping layers beneath passive margins - Their origin and paleoenvironmental significanceGeologisches Jahrbuch E22328Google Scholar
  9. Hinz, K., Krause, W. 1982The continental margin of Queen Maud Land/Antarctica: Seismic sequences, structural elements and geological developmentGeologisches JahrbuchE231741Google Scholar
  10. Hinz, K., Kristoffersen, Y. 1987Antarctica, Recent advances in the understanding of the continental shelfGeologisches JahrbuchE37354Google Scholar
  11. Hübscher, C. 1994Krustenstrukturen und Verlauf des Kontinentalrandes im Weddellmeer/AntarktisAlfred-Wegener-Institut für Polar und MeeresforschungBremerhavenBerichte zur Polarforschung (Reports on Polar Research) 147Google Scholar
  12. Jokat, W., Hübscher, C., Meyer, U., Oszko, L., Schöne, T., Versteeg, W. and Miller, H., (1996) The continental margin off East Antarctica between 10°W and 30°W. In: Storey B, King EC and Livermore RA (eds) Weddell Sea Tectonics and Gondwana Break-up, pp 129–141. Geological Society Special Publication No. 108, London.Google Scholar
  13. Jokat, W.Oerter, H eds. 1997The Expedition ANTARKTIS-XII of RV “Polarstern” in 1995Alfred-Wegener-Institut für Polar und MeeresforschungBremerhavenBerichte zur Polarforschung (Reports on Polar Research) 219Google Scholar
  14. Jokat, W.Oerter, H. eds. 1998The Expedition ANTARKTIS-XIV of RV “Polarstern” in 1997Alfred-Wegener-Institut für Polar und MeeresforschungBremerhavenBerichte zur Polarforschung (Reports on Polar Research) 267Google Scholar
  15. Jokat, W., Boebel, T., König, M., Meyer, U. 2003Timing and geometry of early Gondwana breakupJ. Geophys. Res.1082428doi:10.1029/2002JB001802CrossRefGoogle Scholar
  16. Jokat, W., Helm, V. and Krocker, R., (2003b) Evidence for a giant Plio/Pleistocene submarine slide at the Larsen Shelf, Antarctica. Submitted to Geophys. Res. Lett.Google Scholar
  17. Kuvaas, B., Kristoffersen, Y. 1991The Crary Fan: A Trough-mouth Fan on the Weddell Sea Continental Margin. AntarcticaMar. Geol.97345362CrossRefGoogle Scholar
  18. Livermore, R.A. and Hunter, R.J., (1996) Mesozoic seafloor spreading in the southern Weddell Sea, In: Storey, B., King, E.C. and Livermore, R.A., (eds) Weddell Sea Tectonics and Gondwana Break-up, pp 227–241. Geological Society Special Publication No. 108, London.Google Scholar
  19. Michels, K.H., Rogenhagen, J., Kuhn, G. 2002Recognition of contour-current influence in mixed contourite-turbidite sequences of the western Weddell SeaAntarctica. Mar. Geophys. Res.22465485CrossRefGoogle Scholar
  20. Miller, H., Henriet, J.P., Kaul, N. and Moons, A., (1990) A fine-scale stratigraphy of the eastern margin of the Weddell Sea. In: Bleil U. and Thiede J. (eds.) Geological history of the Polar Oceans: Arctic versus Antarctic, pp 131–161. Kluwer Academic Publishers.Google Scholar
  21. Moons, A., DeBatist M., Henriet, J.P. and Miller, H., (1992) Sequence Stratigraphy of the Cary Fan, Southeastern Weddell Sea. In: Yoshida Y., Kaminuma K. and Shiraishi, K. (eds) Recent progress in Antarctic Earth Science, pp 613–618. Tokyo.Google Scholar
  22. Oszko, L. 1997Tectonic structures and glaciomarine sedimentation in the South-Eastern Weddell Sea from seismic reflection dataAlfred-Wegener-Institut für Polar und MeeresforschungBremerhavenBerichte zur Polarforschung (Reports on Polar Research) 222Google Scholar
  23. Ritzmann, O., (2000) Refraktionsseismische Untersuchungen am Kontinentalrand der Ostantarktis. Diploma thesis (unpublished), Rheinische Friedrich-Wilhelms Universität, Bonn.Google Scholar
  24. Rogenhagen, J. 2000Interpretation seismischer und gravimetrische Daten des Weddellmeeres, AntarktisAlfred-Wegener-Institut für Polar und MeeresforschungBremerhavenBerichte zur Polarforschung (Reports on Polar Research) 369Google Scholar
  25. Rogenhagen, J., Jokat, W. 2000The sedimentary structure in the western Weddell SeaMar. Geol.1684560CrossRefGoogle Scholar

Copyright information

© Springer 2005

Authors and Affiliations

  • J. Rogenhagen
    • 1
  • W. Jokat
    • 1
  • K. Hinz
    • 2
  • Y. Kristoffersen
    • 3
  1. 1.Foundation Alfred Wegener Institute for Polar and Marine ResearchBremerhavenGermany
  2. 2.Federal Institute for Geosciences and Natural ResourcesHannoverGermany
  3. 3.University of BergenBergenNorway

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