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Lower Cretaceous/Upper Jurassic Basin development and fill in the northern Atlantic, Barents Sea and Svalbard (Lower Creaceous Upper Jurassic clastic wedges JuLoCrA)

The northern most Atlantic and southwestern Barents Sea show that in contrast to the Lower and Middle Jurassic prograding and retrograding wide shorelines or deltas the upper Jurassic/lower Cretaceous sandstones are much more localised and point sourced. The main purpose is the basin fill with the Mesozoic Arctic epicontinental or sag basins

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Project date

Starts
2012-04-01

Ends
2019-08-31

Project status

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Project type

  • field work
  • data management
  • theoretical
  • education and outreach

Discipline

  • geology

Project Keywords

  • solid earth / tectonics / stratigraphic sequence

Fieldwork information

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Summary

The northern most Atlantic and southwestern Barents Sea show that in contrast to the Lower and Middle Jurassic prograding and retrograding wide shorelines or deltas of the Upper Jurassic to Lower Cretaceous sandstones are much more localised and point sourced. Local drainage, limited extension of shallow marine sandstone and probably confined gravity deposits in starved basins is most commonly seen in rift basin in south-west Barents Sea. Further inherited rift topography with smaller basins and sediment barriers will localise the drainage pattern and possibly form some master Jurassic faults that are rejuvenated in Lower Cretaceous. Also several sea level rises part gives a backward steeping shoreline with much more variable provenance area for erosion. The sea level rise will also drown the hanging wall shorelines on internal basin highs. In the Greater Barents Sea the lower Cretaceous and upper Jurassic shows a more general prograding and retrograding wide coastline probably influenced by initiation and during HALIP and eustatic sea level changes. The purpose of the study is to reconstruct paleogeography, define major sequence stratigraphic surfaces and facies development of the Upper Jurassic Lower Cretaceous in the Svalbard, Barents Sea, Northern Norwegian Sea and East Greenland.

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