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
Published in:Geological magazine 2015-05, Vol.152 (3), p.480-491
Main Authors: BRANDES, CHRISTIAN, PIEPJOHN, KARSTEN, FRANKE, DIETER, SOBOLEV, NIKOLAY, GAEDICKE, CHRISTOPH
Format: Article
Language:English
Subjects:
Cenozoic
Cretaceous
Evolution
Geophysics
Islands
Mesozoic
Original Articles
Plate tectonics
Rifting
Seismology
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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.
ISSN:0016-7568
1469-5081
DOI:10.1017/S0016756814000326