MESOZOIC-CENOZOIC VOLCANISM AND GEODYNAMIC EVENTS IN THE CENTRAL AND EASTERN ARCTIC
N.L. Dobretsov, V.A. Vernikovsky, Yu.V. Karyakin, E.A. Korago, V.A. Simonov
Keywords: Volcanism, plume, traps, rifting, subduction, geodynamics, Arctic
Abstract
The patterns and history of Mesozoic-Cenozoic plume magmatism in the Arctic are considered in relation with suprasubductional volcanism and geodynamic events. The Mesozoic-Cenozoic magmatic history of the area includes seven stages, distinguished by correlation of ages and compositions of volcanics associated with mid-ocean rifting, plumes, and subduction; three of seven stages correspond to global events at 230-200 Ma, 130-120 Ma, and 40-30 Ma. The reported study supports the inferred inverse correlation between plate velocities and amount of subduction-related volcanism. The gained knowledge is used for paleotectonic reconstructions.
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