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Reconstructing the Triassic northern Barents Shelf; basin infill patterns controlled by gentle sags and faults (Trias North)

We will explore the Triassic basin development and sedimentary infill of the northern Barents Shelf by integrating geological studies onshore Svalbard with offshore seismic data analysis and numerical and analogue modelling.

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Project date

Starts
2014-05-01

Ends
2017-12-31

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Project type

  • field work

Discipline

  • geology

Project Keywords

  • solid earth / tectonics / plate tectonics
  • solid earth / tectonics / stratigraphic sequence
  • solid earth / tectonics / faults
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Summary

The Trias North project expands on earlier work (RisID above), in a new activity funded by the Resource Council of Norway and private Companies. The Trias North objectives are: • Analyze shallow-shelf infill by clinoform migration across regional sag/warp-type basins, • Investigate the fluvial and shallow marine depositional systems of the migrating shelf, • Evaluate the role of growth faulting in the distribution of reservoir sandstones, and assess the implications for prospectivity, • Analyse the provenance of clastic material of the reservoir sandstones by isotopes and chemical signatures, and their burial histories linked to diagenesis, • Investigate impacts on the sedimentary system of the interaction between shelf progradation, basin and high development, and faulting, • Explore tectonic reactivation of deep-seated zones of weakness and correlate this to far-field stress configurations in an analysis of large-scale driving forces. We address the objectives though six work packages targeting sub-objectives: 1) Regional sag/warp-basins; temporal development interplaying with prograding clastic wedges in a source to sink framework, 2) Clinoform facies belts and sequence stratigraphy; sedimentary systems and diagenesis; facies belts with geometry and seismic characteristics informing fluvial and clinoformal systems through quantitative assessment of their shapes, 3) Onshore-offshore growth-basins; location, sedimentary and seismic characteristics and link between basin fill patterns and shelf position, 4) Offshore growth-basins; fault patterns and sedimentary source to sink as reflected in seismic facies belts, and Synthetic seismics modeling of sedimentary systems and shallow growth-basins for sensitivity of visualization, 5) Analogue modeling; sand-silicon box tests of linked deep-seated and shallow-rooted faulting and point-source sediment supply to inform regional interpretations, 6) Education and outreach; 5-8 Master’s, 2 PhD’s and 3 Post Doc’s.

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