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Deep Structure of the Barents-Kara Region According to Geophysical Investigations Along 1-AR and 2-AR GeotraversNormal access

Authors: A.S. Egorov, I.Y. Vinokurov, A.P. Kalenich, E.S. Belevskaya and A.S. Ageev
Event name: 7th EAGE Saint Petersburg International Conference and Exhibition
Session: The Arctic Shelf - Technologies and Prospects for Development of Mineral Resources
Publication date: 11 April 2016
DOI: 10.3997/2214-4609.201600173
Organisations: EAGE
Language: Russian
Info: Extended abstract, PDF ( 2.98Mb )
Price: € 20

Summary:
Principal basis of the Earth’s crust deep structure investigations of Barents- Kara region and adjusent continental structures are DSS and CDP seismic sections. Additional features of the crust are estimated by results of inverse problems of gravimetry and magnetometry, magnetotelluric data and results of geothermic modelling. On the basis of these diverse data the radial-zoning model of the Earth’s crust was grounded. The principal objects of the model are: blocks (paleoplates) of continental type and interblock junction zones (structures of tension, compression or shear type). These objects are identified with confidence on geotransect sections and on maps as areas of geophysical parameters stationarity (blocks) or gradient zones (interblock junction zones). Comparison of coordinated map and deep sections of Barents- Kara region and adjusted continental structures provides imaging of regularities of spatial distribution of: cratons (East-European and Siberian); Grenvillian Barents fold area; Baikalian Timan-Pechora, Enisey an Taimyr fold areas; Hercynian Uralian and Central-West-Siberian fold areas; Cimmerian Paykhoi –Novozemelskiy fold area. Representation of sedimentary cover of Barents, Timan-Pechora, South- and North-Kara basins in the form of transparent layer of the map provides obtaining the principal new interpretation of deep structure of the Earth’s crust features, tectonics and geodynamics of the region.


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