The history of the Cretaceous environments of the northeastern Asian continental margin, Russia |
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| Authors: | Nadezhda I Filatova |
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| Institution: | Institute of Lithosphere, Russian Academy of Sciences, Staromonetny per., 22, 109180, Moscow, Russia |
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| Abstract: | Abstract The Cretaceous geodynamic and paleogeographic evolution of the northeastern Asian continental margin is summarized in five maps for time-intervals of 115-110, 100-90, 90-85, 85-74 and 70-50 Ma. Four major evolutionary stages are recognized: (i) the moderate extensional tectonic regime and origination of a system of island arcs in the Jurassic-Neocomian stage; (ii) Middle Cretaceous strong collisional and accretional processes resulting in the Asian continent formation in the Barremian-Early Albian stage; (iii) the origination of the subduction-related Okhotsk-Chukotka continental marginal volcanic belt in relation to the newly formed convergent plate boundary in the Late Albian-Senonian stage; and (iv) the next collision accompanied by the extinction of the subduction-related volcanism in the Late Cretaceous-Early Paleocene stage (Laramian orogeny) and displayed rift-related processes with the intraplate-type volcanism on the Asian continental margin. Those stages had been established through the whole Pacific ring and had close genetic relationships with mid-ocean ridges tectonic activity. |
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| Keywords: | continental marginal volcanic belts geodynamic evolution Middle Cretaceous collision northeastern Asia Pacific Ocean paleogeography |
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