Deep structure, tectonics and geodynamics of the Sea of Okhotsk region and structures of its folded frame

Abstract

The use of the zonal-block model of the earth's crust for the construction of regional tectonic schemes and sections of the earth's crust based on a complex of geological and geophysical data makes it possible to consider the resulting maps and sections as tectonic models. The main elements of such models are blocks with an ancient continental base and interblock zones formed by complexes of island arcs, an accretionary prism, or oceanic crust. The developed geotectonic model of the Sea of Okhotsk region reflects the features of the deep structure, tectonics, and geodynamics. The Cimmerian Novosibirsk-Chukotka, Verkhoyansk-Kolyma, Kolyma-Omolon, and Amur folded regions and the Alpides of the Koryak-Kamchatka and Sakhalin-Sikhote-Alin folded regions are developed along the northern, western, and southern boundaries of the Sea of Okhotsk megablock with a continental crust type. From the east, the megablock is limited by oceanic basins and island arcs.

Reconstruction of Tectonic Stresses in Central Sakhalin

“…В работе (Воейкова и др., 2007) среди новейших разрывных структур Сахалина выделяются следующие зоны: Западно-Сахалинская шовносбросовая, Центрально-Сахалинская шовнонадвиговая и Восточно-Сахалинская шовносдвиговая. В выделении крупных структур часть авторов опирается на данные геофизических исследований: сейсморазведк у (гл убинное сейсмическое зондирование, корреляционный метод преломленных волн, метод отраженных волн в модификации общей глубинной точки), магниторазведку а также гравиметрию (Рождественский, 2008;Харахинов, 2010;Egorov et al, 2022).…”

Evaluation of Displacements Caused by Strike-Slip Deformations Using Correlation Characteristics Based on Potential Field Data

“…The relevance of shear structures studying is great. Shear faults are interesting in prospecting and exploration of hydrocarbon deposits [Gusev et al, 2020;Prishchepa et al, 2021], as they can form pull-apart basins (troughs) with heavy sedimentation [Egorov et al, 2022;Koronovsky et al, 2009;Sohrabi et al, 2019]. Tectonic-magmatic and disjunctive factors associated with faults, including strike-slip nature, affect the localization of orebearing structures [Alekseev, 2020[Alekseev, , 2021.…”