Paleogeographic Settings and Geodynamics of the Northeastern Pacific Margin of Asia in the Terminal Cretaceous-Early Paleogene

摘要

Evolution of the ocean-continent transition zone in the northeastern Pacific margin of Asia in the context of general geodynamics continues to receive attention from geologists. This problem is considered in many circumstantial works [ 1-3]. At the same time, these general interpretations largely concern its Meso-zoic history, while the Cenozoic remain insufficiently studied. In addition, these works ignored particular features of paleogeographic settings and variations in the geodynamic regime within short geological periods marked by changes in the character of boundaries between domains with the oceanic crust and continental margins. The purpose of this communication is analysis of the paleogeographic settings and geodynamics in the Late Cretaceous-Early Paleogene in the spacious ocean-continent transition zone between the western part of the present-day Bering Sea shelf and western Kamchatka (Fig. 1).