Improved Seismic Stratigraphy of the Mesozoic Weddell Sea |
| |
| Authors: | J Rogenhagen W Jokat K Hinz Y Kristoffersen |
| |
| Institution: | (1) Foundation Alfred Wegener Institute for Polar and Marine Research, 27515 Bremerhaven, Germany;(2) Federal Institute for Geosciences and Natural Resources, 30631 Hannover, Germany;(3) University of Bergen, Bergen, Norway |
| |
| 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 |
| 本文献已被 SpringerLink 等数据库收录！ |
|
