Geosistemy perehodnykh zon = Geosystems of Transition Zones / Геосистемы переходных зон
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2025, Online first

URL: http://journal.imgg.ru/currnumb.htm, https://elibrary.ru/title_about.asp?id=64191,
https://doi.org/10.30730/gtrz.2025.0.rma-361, http://journal.imgg.ru/web/full/f2025-0-361.pdf, https://www.elibrary.ru/zlcdns


Recent movements and deformations in Сentral Sakhalin
@1Vasilenko, Nikolay F., https://orcid.org/0000-0003-1591-9071, n.vasilenko@imgg.ru
1Prytkov, Alexander S. , https://orcid.org/0000-0003-4488-1682, a.prytkov@imgg.ru
2Frolov, Dmitry I., https://orcid.org/0000-0002-7262-0386, dm.frolov@mail.ioffe.ru
3Ten, Alexander S. , https://orcid.org/0009-0007-2469-3584, alexander.s.ten@yandex.ru

1Institute of Marine Geology and Geophysics of the Far Eastern Branch of RAS, Yuzhno-Sakhalinsk, Russia
2Ioffe Physical-Technical Institute of RAS, Saint Petersburg, Russia
3Computing Center of the Far Eastern Branch of RAS, Khabarovsk, Russia
Abstract PDF ENG. .PDF RUS Full text PDF RUS

Abstract. Based on the interseismic velocities of GNSS points, the horizontal deformations in Central Sakhalin were studied. The research area is characterized by the predominance of uniaxial compression conditions, however, the spatial distribution of deformations in the vicinity of the trans-regional lithospheric faults (Central-Sakhalin and Hokkaido-Sakhalin) is heterogeneous. The maximum reduction of the earth’s surface in the NW-SE direction occurs in the Hokkaido-Sakhalin fault zone. The area of intensive deformations of right-lateral slip and minimal dilatation rates is confined to the Central Sakhalin fault zone and its nearest surroundings. Overall, the kinematics of the region indicate the compression of the island at the rate of 2 mm/year and the right-lateral slip of 2.5 mm/year, which corresponds to the recent tectonic regime of the region. The right-lateral slip in the Central Sakhalin fault zone (1 mm/year) confirms its kinematics according to geological and geomorphological studies. Signs of a right-lateral slip in the Hokkaido-Sakhalin fault zone (~0.4 mm/year) appear only within the limits of their determination errors. Based on GNSS observations, the first estimates of secular vertical movements in the investigation area were obtained. The absolute vertical movements in Central Sakhalin are inherited in relation to neotectonic structures. West-Sakhalin and East-Sakhalin uplifts elevate at the rate of ~3 mm/year. A slight sinking of the earth’s surface occurs in Tym-Poronaysk depression.


Keywords:
recent geodynamics, GNSS observations, deformations, Sakhalin Island

For citation: Vasilenko N.F., Prytkov A.S., Frolov D.I., Ten A.S. Recent movements and deformations in Сentral Sakhalin. Geosistemy perehodnykh zon = Geosystems of Transition Zones, 2025, vol. 9, No. 3, 361. (In: Russ., abstr. in Engl.).
https://doi.org/10.30730/gtrz.2025.0.rma-361, http://journal.imgg.ru/web/full/f2025-0-361.pdf

Для цитирования: Василенко Н.Ф., Прытков А.С., Фролов Д.И., Тен А.С. Современные движения и деформации центральной части острова Сахалин. Геосистемы переходных зон, 2025, т. 9, № 3, 361.
https://doi.org/10.30730/gtrz.2025.0.rma-361, http://journal.imgg.ru/web/full/f2025-0-361.pdf,
https://www.elibrary.ru/zlcdns


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