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Tectonic implications of the lithospheric structure across the Barents and Kara shelves

By
Jan Inge Faleide
Jan Inge Faleide
1
Centre for Earth Evolution and Dynamics, Department of Geosciences, University of Oslo, Oslo, Norway
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Victoria Pease
Victoria Pease
2
Department of Geological Sciences, Stockholm University, Stockholm, Sweden
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Mike Curtis
Mike Curtis
3
CASP, Cambridge, UK
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Peter Klitzke
Peter Klitzke
4
Federal Institute for Geosciences and Natural Resources, Hanover, Germany
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Alexander Minakov
Alexander Minakov
1
Centre for Earth Evolution and Dynamics, Department of Geosciences, University of Oslo, Oslo, Norway
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Magdalena Scheck-Wenderoth
Magdalena Scheck-Wenderoth
5
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
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Sergei Kostyuchenko
Sergei Kostyuchenko
6
VNIIGeofizika, Moscow, Russia
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Andrei Zayonchek
Andrei Zayonchek
7
Rosgeo, Moscow, Russia
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Published:
January 01, 2018

Abstract

This paper considers the lithospheric structure and evolution of the wider Barents–Kara Sea region based on the compilation and integration of geophysical and geological data. Regional transects are constructed at both crustal and lithospheric scales based on the available data and a regional three-dimensional model. The transects, which extend onshore and into the deep oceanic basins, are used to link deep and shallow structures and processes, as well as to link offshore and onshore areas. The study area has been affected by numerous orogenic events in the Precambrian–Cambrian (Timanian), Silurian–Devonian (Caledonian), latest Devonian–earliest Carboniferous (Ellesmerian–svalbardian), Carboniferous–Permian (Uralian), Late Triassic (Taimyr, Pai Khoi and Novaya Zemlya) and Palaeogene (Spitsbergen–Eurekan). It has also been affected by at least three episodes of regional-scale magmatism, the so-called large igneous provinces: the Siberian Traps (Permian–Triassic transition), the High Arctic Large Igneous Province (Early Cretaceous) and the North Atlantic (Paleocene–Eocene transition). Additional magmatic events occurred in parts of the study area in Devonian and Late Cretaceous times. Within this geological framework, we integrate basin development with regional tectonic events and summarize the stages in basin evolution. We further discuss the timing, causes and implications of basin evolution. Fault activity is related to regional stress regimes and the reactivation of pre-existing basement structures. Regional uplift/subsidence events are discussed in a source-to-sink context and are related to their regional tectonic and palaeogeographical settings.

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Contents

Geological Society, London, Special Publications

Circum-Arctic Lithosphere Evolution

V. Pease
V. Pease
Stockholm University, Sweden
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B. Coakley
B. Coakley
University of Alaska, Fairbanks, USA
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The Geological Society of London
Volume
460
ISBN electronic:
9781786203410
Publication date:
January 01, 2018

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