The Mesozoic-Cenozoic tectonic evolution of the New Siberian Islands, NE Russia

On the New Siberian Islands the rocks of the east Russian Arctic shelf are exposed and allow an assessment of the structural evolution of the region. Tectonic fabrics provide evidence of three palaeo-shortening directions (NE–SW, WNW–ESE and NNW–SSE to NNE–SSW) and one set of palaeo-extension direct...

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Bibliographic Details
Main Authors: Brandes, Christian, Piepjohn, Karsten, Franke, Dieter, Sobolev, Nikolay, Gaedicke, Christoph
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge : Cambridge University Press 2015
Subjects:
De Long Islands
fold-thrust belt
New Siberian Islands
South Anyui suture zone
Cenozoic
deformation
extensional tectonics
fold and thrust belt
Mesozoic
rifting
suture zone
tectonic evolution
tectonic setting
Russian Federation
Sakha
Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften
Arctic
Laptev Sea
Dewey
Long Islands
laptev
Online Access:https://dx.doi.org/10.15488/2360
http://www.repo.uni-hannover.de/handle/123456789/2386
Description
Summary:On the New Siberian Islands the rocks of the east Russian Arctic shelf are exposed and allow an assessment of the structural evolution of the region. Tectonic fabrics provide evidence of three palaeo-shortening directions (NE–SW, WNW–ESE and NNW–SSE to NNE–SSW) and one set of palaeo-extension directions revealed a NE–SW to NNE–SSW direction. The contractional deformation is most likely the expression of the Cretaceous formation of the South Anyui fold–thrust belt. The NE–SW shortening is the most prominent tectonic phase in the study area. The WNW–ESE and NNW–SSE to NNE–SSW-oriented palaeo-shortening directions are also most likely related to fold belt formation; the latter might also have resulted from a bend in the suture zone. The younger Cenozoic NE–SW to NNE–SSW extensional direction is interpreted as a consequence of rifting in the Laptev Sea.

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