Seismo-stratigraphic analysis of the Wilkes Land continental margin (East Antarctica): influence of glacially driven processes on the Cenozoic deposition

Santis, Laura De; Brancolini, Giuliano; Donda, Federica

doi:10.1016/s0967-0645(03)00079-1

Cited by 80 publications

(102 citation statements)

References 24 publications

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“…1). Typical seismic characteristics defined in other studies through drilling and seismic reflection data (e. Wilkes Land: DeSantis et al, 2003;Escutia et al, 2011) were used as a guide to identify the pre-glacial to glacial units; briefly summarised as follows:…”

Section: Seismic Characterizationmentioning

confidence: 99%

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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Section: Seismic Characterizationmentioning

confidence: 99%

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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“…Pre-Eocene syn-rift strata are about 3 km thick and are highly variable in seismic character, with discontinuous, faulted, and tilted strata onlapping the flanks of the acoustic basement (Eittreim and Smith, 1987;Eittreim, 1994;De Santis et al, 2003;Stagg et al, 2004a, b;Leitchenkov et al, 2007).…”

Section: Pre-ice-sheet Stratigraphymentioning

confidence: 99%

“…In the EWL postrift strata are up to 5 km thick across the Wilkes Land continental shelf, slope and rise (Eittreim and Smith, 1987;Hampton et al, 1987;Wannesson, 1990;Tanahashi et al, 1994;De Santis et al, 2003). These strata are welllayered on the continental rise and become less stratified and more discontinuous landward (Eittreim and Smith, 1987;Eittreim, 1994; Cenozoic Climate History from Seismic Reflection and Drilling Studies 127…”

Section: Pre-ice-sheet Stratigraphymentioning

confidence: 99%

“…regional unconformities, WL-U3 and WL-U8 (Wannesson et al, 1985;Eittreim and Smith, 1987;Hampton et al, 1987;De Santis et al, 2003), and the erosion is thought to result from grounded ice sheets moving across the continental shelf (Tanahashi et al, 1994;Eittreim et al, 1995;Escutia et al, 1997;Escutia et al, 2005). Eittreim et al (1995) calculated erosion of 300 to 600 m of strata below WL-U3.…”

Section: Continental Shelf Glacial Stratigraphymentioning

confidence: 99%

“…Prograding strata above the WL-U8 unconformity downlap and pinch out at the base of the continental slope, but deeper units (i.e. between WL-U8 and WL-U3) continue across the margin Eittreim et al, 1995;Escutia et al, 1997;De Santis et al, 2003) (Fig. WL-2).…”

Section: Continental Slope Glacial Stratigraphymentioning

confidence: 99%

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Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

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Preglacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica

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Circum-Antarctic sediment thickness grids provide constraints for basin evolution and paleotopographic reconstructions, which are important for paleo-ice sheet formation histories. By compiling old and new seismic data, we identify sequences representing preglacial, transitional, and full glacial deposition processes along the Pacific margin of West Antarctica. The preglacial sediment grid depicts 1.3-4.0 km thick depocenters, relatively evenly distributed along the margin. The depocenters change markedly in the transitional phase at, or after, the Eocene/Oligocene boundary when the first major ice sheets reached the shelf. Full glacial sequences, starting in the middle Miocene, indicate new depocenter formation North of the Amundsen Sea Embayment and localized eastward shifts in the Bellingshausen Sea and Antarctic Peninsula basins. Using present-day drainage paths and source areas on the continent, our calculations indicate that an estimated observed total sedimentary volume of 10 3 10 6 km 3 was eroded from West Antarctica since the separation of New Zealand in the Late Cretaceous. Of this, 4.9 3 10 6 km 3 predates the onset of glaciation and need to be considered for a 34 Ma paleotopography reconstruction. Whereas 5.1 3 10 6 km 3 postdates the onset of glaciation, of which 2.5 3 10 6 km 3 were deposited in post mid-Miocene full glacial conditions.

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Seismo-stratigraphic analysis of the Wilkes Land continental margin (East Antarctica): influence of glacially driven processes on the Cenozoic deposition

Cited by 80 publications

References 24 publications

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Preglacial to glacial sediment thickness grids for the Southern Pacific Margin of West Antarctica

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