Crustal model and tectonic zoning of the continent-ocean transition zone in the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt
Abstract
Maps of the deep structure and tectonic zoning of the continent-ocean transition zone have been compiled for the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt. The maps are part of a digital 1:1 M seamless maps package of the Far East area. A brief description of the crustal structure in the ocean-tocontinent transition zone is given. Data on the depth of the main structural surfaces such as the roof and the bottom of the consolidated crust, the thickness of the crust and its constituent parts – volcanic-sedimentary, granite-metamorphic and granulite-basitic layers are presented. The earth crust is represented by three types: oceanic, transitional and continental. The minimum thickness is 12 to 24 km in oceanic crust blocks, the maximum one is 40 to 47 km in continental blocks. The method of generalization of deep geophysical soundings and their correlation by means of density modeling was applied in map compiling.
About the Authors
M. D. Sidorov
Scientific Research Geotechnological Centre FEB RAS (RGC FEB RAS)
Russian Federation
Russian Federation
Candidate of Geological and Mineralogical Sciences, Leading researcher
A. V. Razumny
A. P. Karpinsky Russian Geological Research Institute (VSEGEI)
Russian Federation
Russian Federation
Leading specialist
E. P. Isaeva
A. P. Karpinsky Russian Geological Research Institute (VSEGEI
Russian Federation
Russian Federation
Leading geologist
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Review
For citations:
Sidorov M.D., Razumny A.V., Isaeva E.P. Crustal model and tectonic zoning of the continent-ocean transition zone in the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt. Regional Geology and Metallogeny. 2020;(82):69–82. (In Russ.)
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