Marine Geophysical Researches

, Volume 25, Issue 3, pp 265–282

Improved Seismic Stratigraphy of the Mesozoic Weddell Sea

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

DOI: 10.1007/s11001-005-1335-y

Cite this article as:
Rogenhagen, J., Jokat, W., Hinz, K. et al. Mar Geophys Res (2004) 25: 265. doi:10.1007/s11001-005-1335-y

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

Antarcticasediment thicknessseismic reflection dataseismic refraction dataseismic stratigraphyWeddell Sea Basin

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