Abstract
A gravity field interpretation is performed for the North Sikhote-Alin and North Sakhalin fold structures junction area using the COSCAD-3D software package, and petrodensity and petromagnetic maps are compiled, thus making it possible to obtain new data on the petrophysical features and the deep structure of the area under study. As a result of the complex geophysical and petrophysical data’s interpretation, a sketch map of the disjunctive tectonics is compiled and the circular structure featuring a unique rock fill caused by the influence exerted by the mantle’s deep structure is identified and can be considered as a magma chamber structure with the center being in the North Sakhalin Bay.
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