Abstract
The eastern margin of Asia hosts numerous Mesozoic‐Cenozoic depressions or sedimentary basins: Amur‐Zeya, Bureya, Torom, Uda, Middle Amur, Alchan, and others (Fig. 1). Their formation is closely related to general geological development of the continental margin. Therefore, concepts on their origin were transformed in accordance with the development of concepts on the regional geodynamic evolution. The great body of geological, geochemical, geochronological, paleontological, and paleomagnetic data accumulated in recent years has provided insight into the Mesozoic and Cenozoic tectonic events that produced the present-day structure of East Asia. At the same time, geochronological and geochemical data on volcanic rocks in continental sedimentary basins are scarce, although precisely such information is crucial for understanding the origin of these structures. In the present communication, we discuss geochemical and 40 Ar/ 39 Ar geochronological data obtained for volcanics of the Amur‐Zeya Depression (AZD), which is among the largest structures of this kind in the Russian Far East.
Published Version
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