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Book Chapter

Mesozoic structural evolution of the New Siberian Islands

By
Karsten Piepjohn
Karsten Piepjohn
1
Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hanover, Germany
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Henning Lorenz
Henning Lorenz
2
Department of Earth Sciences, Uppsala University, Villavägen 16, 75236 Uppsala, Sweden
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Dieter Franke
Dieter Franke
1
Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hanover, Germany
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Christian Brandes
Christian Brandes
3
Institute of Geology, Leibnitz-Universität Hannover, Callinstrasse 30, 30167 Hanover, Germany
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Werner von Gosen
Werner von Gosen
4
GeoZentrum Nordbayern, Friedrich-Alexander University of Erlangen-Nuremberg, Schlossgarten 5, 91054 Erlangen, Germany
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Christoph Gaedicke
Christoph Gaedicke
1
Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hanover, Germany
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Loic Labrousse
Loic Labrousse
5
University of Paris, 4 place de Jussieu, 75252 Paris Cedex 05, France
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Nikolay N. Sobolev
Nikolay N. Sobolev
6
Karpinsky All Russian Geological Research Institute, 74 Sredny Prospect, 199106 St Petersburg, Russia
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Piotr Solobev
Piotr Solobev
6
Karpinsky All Russian Geological Research Institute, 74 Sredny Prospect, 199106 St Petersburg, Russia
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Guillaume Suan
Guillaume Suan
7
University of Lyon, Laboratoire de Géologie de Lyon, 2 Rue Raphaël Dubois, 69622 Villeurbanne Cedex, France
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Sabine Mrugalla
Sabine Mrugalla
1
Federal Institute for Geosciences and Natural Resources, Stilleweg 2, 30655 Hanover, Germany
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Franco Talarico
Franco Talarico
8
Dipartimento di Scienze della Terra, University of Siena, Via Laterino 8, 53100 Siena, Italy
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Tatiana Tolmacheva
Tatiana Tolmacheva
6
Karpinsky All Russian Geological Research Institute, 74 Sredny Prospect, 199106 St Petersburg, Russia
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Published:
January 01, 2018

Abstract

The New Siberian Islands are affected by a number of Mesozoic tectonic events. The oldest event (D1a) is characterized by NW-directed thrusting within the South Anyui Suture Zone combined with north–south-trending sinistral strike-slip in the foreland during the Early Cretaceous. This compressional deformation was followed by dextral transpression along north–south-trending faults, which resulted in NE–SW shortening in the Kotelny Fold Zone (D1b). The dextral deformation can be related to a north–south-trending boundary fault zone west of the New Siberian Islands, which probably represented the Laptev Sea segment of the Amerasia Basin Transform Fault in pre-Aptian–Albian times. The presence of a transform fault west of the islands may be an explanation for the long and narrow sliver of continental lithosphere of the Lomonosov Ridge and the sudden termination of the South Anyui Suture Zone against the present Laptev Sea Rift System. The intrusion of magmatic rocks 114 myr ago was followed by NW–SE-trending sinistral strike-slip faults of unknown origin (D2). In the Late Cretaceous–Paleocene, east–west extension (D3) west of the New Siberian Islands initiated the development of the Laptev Sea Rift System, which continues until today and is largely related to the development of the Eurasian Basin.

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