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Pleistocene of the North Sea

Pleistocene of the North Sea. Hans Petter Sejrup. Marine Geological cruise to the North Sea – Fladen area, 2005. Research perspectives. Quaternary stratigraphy and paleoenvironments Paleoclimatic studies - (Rapid) Meltwater & stability of marine based ice sheets Holocene Glacial processes

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Pleistocene of the North Sea

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  1. Pleistocene of the North Sea Hans Petter Sejrup Petromaks

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  3. Marine Geological cruise to the North Sea – Fladen area, 2005 Petromaks

  4. Research perspectives • Quaternary stratigraphy and paleoenvironments • Paleoclimatic studies - (Rapid) • Meltwater & stability of marine based ice sheets • Holocene • Glacial processes • Ice streams…. • Site surveys • Geotechnics & coring programs • Influence on hydrocarbon reservoirs (GLACIPET) • Subsidence and overburden Petromaks

  5. Challenges • Genetic interpretation of sediments and acoustic units • Till…. • Marine, fluvial, lacustrine sediments… • Methods • Chronostratigraphy • AMS, Sr isotopes… • Paleomag, amino, bio.. • Episodic style of sedimentation & erosion Petromaks

  6. Norwegian sector Ice stream influence Petromaks

  7. Marginal moraines • Troll Glacial lineations Petromaks

  8. Sejrup et al. 1995 Petromaks

  9. Sejrup et al. 2000 Petromaks

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  12. Max. glaciation scenario Interglacial scenario Petromaks

  13. UK sector Incisions,tills and shallow marine Petromaks

  14. Carr in press Petromaks

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  16. BGS 81/26 Petromaks Sejrup et al. 1987

  17. LGM glacial history • History of reconstructions • Understanding of the system - chronology • Meltwater delivery how, when and volumes • Stability of icestreams to the margin • Some keysites and their implications Petromaks

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  25. Conclusion • Dynamic model for the Pleistocene development of the North Sea ? • Understanding of processes and their implications (Ice streams, meltwater, incisions etc.) • 3 D data potensial -long cores -fieldwork • Volumes and timing • Modelling…. Petromaks

  26. H3 Norwegian Sea MD 2010 MD 2289 Petromaks

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  28. Stoker et al. Petromaks

  29. UK ice sheet c.18 ka BP Pre LGM dates in Scotland Boulton 2002 Petromaks

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