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Based on analysis and interpretation of seismic and other geological-geophysical data, duplex rifting is identified in the Paleozoic evolution of the South Barents Basin. Its first, pre–Late Devonian, phase was manifested on the southeastern side zone that limited the Pechora Plate structures. After a certain pause, a second, pre–Late Carboniferous phase involved the western Barents Sea region, including the slope of the Central Barents Rise and the western South Barents Basin. Thus, Late Paleozoic riftogenic structures in the western and southeastern South Barents Basin formed at different times. All this caused an asymmetric structure profile and asynchronicity of evolution of the rift system sides. In the Mesozoic, under the effect of formation of the Novaya Zemlya fold-and-thrust structure, the asymmetry of the riftogenic trough became even more contrasting. 相似文献
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Structure of the basins of the White Sea rift systems 总被引：1，自引：0，他引：1
For the first time, the structure of the sedimentary basins of the Late Proterozoic rift system in the White Sea is characterized based on a set of new marine geological geophysical data such as the results of the common depth point seismic method, gravity and magnetic data, and seismoacoustics. The main tectonic structures in the topography of the heterogeneous basement within the basin of the White Sea are distinguished and described. A structural tectonic scheme of the basement surface is presented. The thicknesses of the sediments are estimated and the stratigraphic confinement of the seismic units recognized is done. 相似文献
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L. I. Lobkovsky E. V. Shipilov M. V. Kononov 《Izvestiya Physics of the Solid Earth》2013,49(6):767-785
By interpretation of the complex geological and geophysical data and paleotectonic reconstructions based on the results of deep seismic tomography, a new deep geodynamic mechanism is developed to describe the formation and evolution of Amerasian and Eurasian basins, together with their adjacent geological structures of the Arctic region. The Mesozoic and Cenozoic transformations of the lithosphere in a number of regions of the Arctic Ocean are considered. The role and place of the upper-mantle convection is explored, and the chronology of the key structure-forming events is analyzed. 相似文献
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Geotectonics - Interpretational analysis of new seismic data allowed us to reconstruct the geodynamic settings that led to the formation of an ensemble of tectonic structural elements in the... 相似文献
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The structure and geodynamic history of the northern Barents–Kara continental margin, which had formed mostly by the latest Paleozoic, have been investigated using offshore geological and geophysical data and geological evidence from adjacent landmasses. In the context of the suggested model, the Saint Anna trough is interpreted as a boundary tectonic element between the Svalbard and Kara plates. Thus, the study focuses on a complex tectonic node with its structure having implications for the trough origin, as well as for the history of geodynamic relations among Arctic cratons and microplates. Trough structures of different ages in the area, including the northeastern East Barents trough and the St. Anna trough, appear to be a zone of triple or T-shaped junction. The reported reconstruction of the trough system history since the Middle Paleozoic shows that the St. Anna trough joined the East-Barents system in the Late Permian–Triassic to become its new segment extending the system to the north. 相似文献
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