Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity in the surrounding catchments and sediment transport in the Arctic basins. This study is the first attempt to investigate the evolution of these source areas through time. Our analysis of sediment budgets from subsurface data in the Greater Barents Sea Basin and application of the BQART approach to estimate catchment properties shows that (1) during the Lower Triassic, sediment supply was at its peak in the basin and comparable to that of the biggest modern-day river systems, which are supplied by tectonically active orogens; (2) the Middle Triassic sediment load was significantly lower but still comparable to that of the top 10 largest modern rivers; (3) during the Upper Triassic, sediment load increased again in the Carnian; and (4) there is a large mismatch (70%) between the modeled and estimated sediment load of the Carnian. These results are consistent with the Triassic Greater Barents Sea Basin succession being deposited under the influence of the largest volcanic event ever at the Permian-Triassic boundary (Siberian Traps) and concurrent with the climatic changes of the Carnian Pluvial Event and the final stages of the Northern Ural orogeny. They also provide a better understanding of geodynamic impacts on sedimentary systems and improve our knowledge of continental-scale sediment transport. Finally, the study demonstrates bypass of sediment from the Ural Mountains and West Siberia into the adjacent Arctic Sverdrup, Chukotka, and Alaska Basins in Late Carnian and Late Norian time.
Research Article|
November 05, 2021
Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin
Albina Gilmullina;
Albina Gilmullina
1
Department of Earth Science, University of Bergen, Allégaten 41, 5007 Bergen, Norway
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Tore Grane Klausen;
Tore Grane Klausen
2
MVest Energy AS, Edvard Griegs vei 3, 5059 Bergen, Norway
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Anthony George Doré;
Anthony George Doré
3
Energy & Geoscience Institute (EGI), University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, Utah 84108, USA
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Valentina Marzia Rossi;
Valentina Marzia Rossi
4
Italian National Research Council, Institute of Geosciences and Georesources, Via Adolfo Ferrata, 1, I-27100 Pavia, Italy
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Anna Suslova;
Anna Suslova
5
Petroleum Department, Lomonosov Moscow State University, 1 Leninskiye Gory, 119991 Moscow, Russia
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Christian Haug Eide
Christian Haug Eide
1
Department of Earth Science, University of Bergen, Allégaten 41, 5007 Bergen, Norway
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GSA Bulletin (2021)
Article history
received:
19 Feb 2021
rev-recd:
09 Jul 2021
accepted:
07 Sep 2021
first online:
06 Nov 2021
Citation
Albina Gilmullina, Tore Grane Klausen, Anthony George Doré, Valentina Marzia Rossi, Anna Suslova, Christian Haug Eide; Linking sediment supply variations and tectonic evolution in deep time, source-to-sink systems—The Triassic Greater Barents Sea Basin. GSA Bulletin 2021; doi: https://doi.org/10.1130/B36090.1
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- Arctic Ocean
- Barents Sea
- Commonwealth of Independent States
- deposition
- geophysical methods
- geophysical profiles
- geophysical surveys
- Mesozoic
- Monte Carlo analysis
- numerical models
- paleogeography
- Russian Federation
- sediment budget
- sediment transport
- seismic methods
- seismic profiles
- Siberian Traps
- statistical analysis
- surveys
- transport
- Triassic
- BQART
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