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The results of reinterpretation of the geophysical data obtained during the study of the central sector of the Kuril Island Arc (2005–2010) are reported. The new boundaries of the shallow bedding of the basement and its block uplifts of varied composition are defined within the previously discovered zone of tectonic stretching and destruction of the Vityaz submarine ridge and interarc trough. Interblock depressions filled with sedimentary and volcanogenic-sedimentary rocks are distinguished. Areas represented by volcanoplutonic complexes including basic and sialic series (up to granite) are distinguished within the unbroken basement of the Vityaz Ridge. Intrusions and volcanic edifices composed of basic rocks are registered on the whole area studied. The relationship between the formation of the destruction zone and the geodynamic processes in the mantle is illustrated by the map of the Moho relief and structural-density model of the Earth’s crust. 相似文献
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Shakirov R. B. Cuong Do Huy Obzhirov A. I. Valitov M. G. Lee N. S. Legkodimov A. A. Kalgin V. Yu. Yeskova A. I. Proshkina Z. N. Telegin Yu. A. Storozhenko A. V. Ivanov M. V. Pletnev S. P. Sedin V. T. Bulanov A.V. Shvalov D. A. Lipinskaya N. A. Bovsun M. A. Makseev D. S. Thanh Nguyen Trung Anh Le Duc Luong Le Duc 《Oceanology》2021,61(1):147-149
Oceanology - Abstract—The paper gives brief results of comprehensive studies in the South China Sea obtained from a joint Russian–Vietnamese expedition in November 2019 (cruise 88 of... 相似文献
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V. Yu. Timofeev E. N. Kalish Yu. F. Stus’ D. G. Ardyukov M. G. Valitov A. V. Timofeev D. A. Nosov I. S. Sizikov E. V. Boiko P. Yu. Gornov R. G. Kulinich T. N. Kolpashchikova Z. N. Proshkina E. O. Nazarov V. G. Kolmogorov 《Izvestiya Physics of the Solid Earth》2018,54(3):430-443
The modern gravimetry methods are capable of measuring gravity with an accuracy of up to 10–10 of the normal value, which is commensurate with the accuracy of the up-to-date methods of displacement measurements by satellite geodesy. Significant changes, e.g., in the coseismic displacements of the Earth’s surface are recorded in the zones of large earthquakes. These changes should manifest themselves in the variations of gravity. Absolute measurements have been conducted by various modifications of absolute ballistic gravimeters GABL since the mid-1970s at the Klyuchi point (Novosibirsk) in the south of the West Siberian plate. Monitoring observations have been taking place in the seismically active regions since the 1990s. In this paper we consider the results of the long-term measurements of the variations in gravity and recent crustal displacements for different types of earthquakes (the zones of shear, extension, and compression). In the seismically active areas in the east of Russia, the longest annual series of absolute measurements starting from 1992 was recorded in the southeastern segment of Baikal region. In this area, the Kultuk earthquake with magnitude 6.5 occurred on August 27, 2008, at a distance of 25 km from the observation point of the Talaya seismic station. The measurements in Gornyi (Mountainous) Altai have been conducted since 2000. A strikeslip earthquake with magnitude 7.5 took place in the southern segment of the region on September 27, 2003. The effects of the catastrophic M = 9.0 Tohoku, Japan, earthquake of March 11, 2011 were identified in Primor’e in the far zone of the event. The empirical data are consistent with the results of modeling based on the seismological data. The coseismic variations in gravity are caused by the combined effect of the changes in the elevation of the observation point and crustal deformation. 相似文献
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Valitov M. G. Shakirov R. B. Lee N. S. Legkodimov A. A. Yakimov T. S. Ponomareva A. L. Kalinchuk V. V. Bovsun M. A. Bulanov V. A. Proshkina Z. N. Syrbu N. S. Korskov I. V. Kalgin V. Yu. Baldanova K. O. Okulov A. K. Makseev D. S. 《Oceanology》2022,62(1):139-141
Oceanology - The paper presents brief results of comprehensive studies of the water area of the Tatar Strait and Sea of Japan obtained on cruise 61 of the R/V “Akademik Oparin” in... 相似文献
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Proshkina Z. N. Valitov M. G. Kolpashchikova T. N. Lee N. S. Tsovbun N. M. 《Oceanology》2021,61(6):1016-1025
Oceanology - After a long hiatus, integrated geological and geophysical studies resumed in the western South China Sea. The research was carried out on cruise 88 of the R/V Akademik M.A.... 相似文献
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Kharitonova N. A. Filimonova E. A. Kortunov E. A. Samartsev V. N. Drobyazko E. V. Sorokoumova Ya. V. Grechushnikova M. G. Proshkina A. L. Pozdnyakov S. P. 《Water Resources》2022,49(4):630-646
Water Resources - The results of our study show that the natural waters in the southwestern part of the Crimean Peninsula are characterized by a wide range of chemical and isotopic composition. The... 相似文献
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Proshkina Z. N. Valitov M. G. Kolpashchikova T. N. Naumov S. B. 《Izvestiya Physics of the Solid Earth》2021,57(1):98-109
Izvestiya, Physics of the Solid Earth - Abstract—The residual vector В (B, β) calculated from the difference of the observed tidal variations in gravity Аobs(А, α)... 相似文献
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Based on the combined analysis of the seismologic and other geophysical data (the gravity and magnetic fields and the acoustic basement topography), it was revealed that the largest earthquakes that occurred in the region of the Central Kuril Islands in 2006, 2007, and 2009 were related to the block structure of the Earth’s crust. The aftershocks of the largest earthquakes recorded in 2006 and 2007 became foreshocks for the earthquakes of 2007 and 2009, respectively. In total, the earthquakes that occurred in this area in the period of 2006–2012 are closely related to the tectonic destruction zone existing there, clarify its position, and support the previous concept of the superimposed and cross cutting relationships of this zone with respect to the Kuril Island Arc. 相似文献
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