The history of the formation of southern East-Siberian sea shelf thrust-and-fold zone. Results of the comprehensive seismic and geological data interpretation
Abstract
The tectonic boundaries of the Anuy, Rauchuan, Chaun-Chuckchi and Wrangel folded zones were constrained offshore the Northern Chukotka folded area as a result of the comprehensive analysis of the geological and geophysical data. Five structural levels were revealed in the geological cross-section: Ellesmerian, Chuckotian, Beaufortian, Cretacious, and Cenozoic. The polystage tectonic history of the faults formation was suggested. The Pegtymelskaya sub-meridional shear zone separating the structures of the Wrangel and Chukchi zones was identified for the first time. The Billings regional fault established by seismic data is considered to be the northern distribution boundary of the Early Cretaceous granitoids of the Chukchi Orogeny and is located on the continuation of the Kobuk suture zone (Alaska). In the central part of the shelf, a system of Epielsmere (?) pull-apart pools (Dremhed, Baranovsky, and Denbars) formed in the Late Cretaceous submeridional transtensia is distinguished.
About the Authors
P. V. Rekant
A. P. Karpinsky Russian Geological Research Institute (VSEGEI)
Russian Federation
Russian Federation
Candidate of Geological and Mineralogical Sciences, Leading Researcher
O. V. Petrov
A. P. Karpinsky Russian Geological Research Institute (VSEGEI)
Russian Federation
Russian Federation
Doctor of Geological and Mineralogical Sciences, Doctor Economic Sciences, Director General
D. V. Prishchepenko
A. P. Karpinsky Russian Geological Research Institute (VSEGEI)
Russian Federation
Russian Federation
Engineer
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For citations:
Rekant P.V., Petrov O.V., Prishchepenko D.V. The history of the formation of southern East-Siberian sea shelf thrust-and-fold zone. Results of the comprehensive seismic and geological data interpretation. Regional Geology and Metallogeny. 2020;(82):35–59. (In Russ.)
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