По современным представлениям [3, 33, 34 и др.] Сихотэ-Алинский орогенный пояс образован террейнами, сложенными породными комплексами различных палеогеодинамических структур. В составе террейнов имеются породы, сформированные как в надсубдукционных, так и во внутриплитных океанических обстановках [2, 3, 5]. И если разделение пород на надсубдукционные и внутриплитные океанические в настоящее время не встречает заметных трудностей, то разделение первых на образования преддуговых, междуговых или задуговых бассейнов, фронтальных или УДК [550.384+550.93+551.248.1+552.3/5] (571.6
New petrogeochemical data were used to determine conditions for the formation of volcanics and their tectonic position in the area of Lake Udyl’. These rocks were correlated with similar rocks in the region. Volcanics of two genetic types were identified in the area of Lake Udyl’: 1) intraplate oceanic volcanics as part of the accretionary volcanic-siliceous complex (Tithonian-Valanginian-Hauterivian-Barremian) similar to accretionary complexes in other segments of the Kiselevka-Manoma Terrane, and 2) suprasubduction-zone volcanics as part of the island-arc volcanogenic-terrigenous complex (Valanginian-Hauterivian-Aptian-Albian-Cenomanian). A conclusion about the tectonic superposition of complexes of different genesis in the Udyl’ segment is based on synthesis of the new geological and petrogeochemical data, as well as geochronological and paleomagnetic data from previous studies.
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