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RECONSTRUCTION OF TECTONIC STRESSES IN CENTRAL SAKHALIN
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The article presents the reconstruction of the tectonic stress field of the central part Sakhalin Island, obtained as a result of field tectonophysical studies in 2020–2022. The measurements made it possible to determine the predominant orientation of the main slickensides systems with different kinematics. The territory of Central Sakhalin is characterized by mainly subvertical orientation of the axis of maximum compression, as well as the subhorizontal and predominantly submeridionally directed axis of minimum compression (extension). The main revealed feature of Central Sakhalin is the predominance of horizontal extension as a type of stress state for the entire area. In its western part, horizontal shear and horizontal compression are significant. The number of horizontal extension conditions increases in the near-axial and eastern part of Central Sakhalin, closer to the Sea of Okhotsk. We found the cardinal difference between the obtained results of the stress field reconstruction and the results of similar studies in other geodynamically active regions of the country.
Title: RECONSTRUCTION OF TECTONIC STRESSES IN CENTRAL SAKHALIN
Description:
The article presents the reconstruction of the tectonic stress field of the central part Sakhalin Island, obtained as a result of field tectonophysical studies in 2020–2022.
The measurements made it possible to determine the predominant orientation of the main slickensides systems with different kinematics.
The territory of Central Sakhalin is characterized by mainly subvertical orientation of the axis of maximum compression, as well as the subhorizontal and predominantly submeridionally directed axis of minimum compression (extension).
The main revealed feature of Central Sakhalin is the predominance of horizontal extension as a type of stress state for the entire area.
In its western part, horizontal shear and horizontal compression are significant.
The number of horizontal extension conditions increases in the near-axial and eastern part of Central Sakhalin, closer to the Sea of Okhotsk.
We found the cardinal difference between the obtained results of the stress field reconstruction and the results of similar studies in other geodynamically active regions of the country.
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