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Basement control and history of ice-sheet expansion in the Amundsen Sea Embayment

Basement control and history of ice-sheet expansion in the Amundsen Sea Embayment First results of recent RV Polarstern and RRS James Clark Ross cruises. K. Gohl, G. Eagles, G. Uenzelmann-Neben, G. Kuhn Alfred Wegener Institute for Polar & Marine Research Bremerhaven, Germany

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Basement control and history of ice-sheet expansion in the Amundsen Sea Embayment

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  1. Basement control and history of ice-sheet expansion in the Amundsen Sea Embayment First results of recent RV Polarstern and RRS James Clark Ross cruises K. Gohl, G. Eagles, G. Uenzelmann-Neben, G. Kuhn Alfred Wegener Institute for Polar & Marine Research Bremerhaven, Germany R. Larter, T. Deen, C.-D. Hillenbrand British Antarctic Survey, Cambridge, UK F.O. Nitsche Lamont-Doherty Earth Observatory, Palisades, NY, USA Tectonics & Sedimentation in Amundsen Sea & Pine Island Bay

  2. RV Polarstern cruise ANT-XXIII/4 • Geoscientific objectives: • Reconstruction of glacial cyclicity since begin of glaciation • Delineating retreat history after LGM • Searching for young volcanism on shelf as constraining factor for grounded ice-sheet stability • Understanding break-up process and margin development between MBL/TI and NZ • Defining crustal block boundaries Tectonics & Sedimentation in Amundsen Sea & Pine Island Bay

  3. Tectonics & Sedimentation in Amundsen Sea & Pine Island Bay

  4. Seismic profiling during Polarstern cruise ANT-XXIII/9 (2006) Marie Byrd Seamounts 20060200 T.I. 20060100 Ellsworth Land Marie Byrd Land Thick lines: Deep crustal seismic refraction profiles with OBH systems. Satellite-derived gravity from Laxon & McAdoo (1997). Tectonics & Sedimentation in Amundsen Sea & Pine Island Bay

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