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

Abstract 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-extensi...

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Bibliographic Details
Published in:Geological Magazine
Main Authors: BRANDES, CHRISTIAN, PIEPJOHN, KARSTEN, FRANKE, DIETER, SOBOLEV, NIKOLAY, GAEDICKE, CHRISTOPH
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2014
Subjects:
Arctic
Laptev Sea
New Siberian Islands
laptev
Online Access:http://dx.doi.org/10.1017/s0016756814000326
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756814000326
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Summary:Abstract 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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