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DEEP VELOCITY SECTIONS OF THE AVACHINSKAYA BAY AREA OF THE KAMCHATKA PENINSULA OBTAINED BY THE RECEIVER FUNCTION METHOD
1 Sadovsky Institute of Geosphere Dynamics of the Russian Academy of Sciences
2 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
3 Institute of Volcanology and Seismology Far Eastern Branch of the Russian Academy of Sciences
4 Kamchatka Branch of Geophysical Survey, Russian Academy of Sciences
Journal: Geophysical research
Tome: 24
Number: 2
Year: 2023
Pages: 25-38
UDK: 550.437
DOI: 10.21455/gr2023.2-2
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Reznichenko
A.G R.A. DEEP VELOCITY SECTIONS OF THE AVACHINSKAYA BAY AREA OF THE KAMCHATKA PENINSULA OBTAINED BY THE RECEIVER FUNCTION METHOD // . 2023. Т. 24. № 2. С. 25-38. DOI: 10.21455/gr2023.2-2
@article{Reznichenko
A.GDEEP2023,
author = "Reznichenko
A.G, R. A.",
title = "DEEP VELOCITY SECTIONS OF THE AVACHINSKAYA BAY AREA OF THE KAMCHATKA PENINSULA OBTAINED BY THE RECEIVER FUNCTION METHOD",
journal = "Geophysical research",
year = 2023,
volume = "24",
number = "2",
pages = "25-38",
doi = "10.21455/gr2023.2-2",
language = "English"
}
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Keywords: seismology, receiver function, deep structure, velocity models, Kamchatka peninsula.
Аnnotation: The article is devoted to the study of the structure of the Earth's crust and upper mantle of the Avachinskaya Bay region of the Kamchatka Peninsula. One-dimensional sections of the dependence of seismic velocities on depth, obtained during the study are presented. These sections are built according to the data of “Petropavlovsk” (PET), “Dalniy” (DAL), “Institut” (IVS) and “Karymshina” (KRM) stations for the period from 2000 to 2019. The stations are part of the permanent observational network of seismic stations of the Kamchatka Branch of the Unified Geophysical Service of the Russian Academy of Sciences. The sections are built to a depth of 300 km, which makes it possible to characterize the structure of the medium in the bay area, namely, to identify structural layers in the Earth's crust, the Mohorovichich boundary, and to estimate the degree of deviation of seismic wave velocities in the upper mantle from the corresponding values of the IASP91 global Earth model. The average values of velocities calculated from the obtained sections in the Earth's crust and upper mantle turned out to be noticeably lower compared to the global model. The average deviation of the observed velocities from the model ones is 0.5–1.0 km/s in the crust, and then gradually decreases down to a depth of about 180 km. At greater depths, the velocities in the obtained models coincide with the standard values. It should be noted that at the locations of the seismic stations, the lower boundary of the subducting Pacific Plate runs at depths of about 180 km. Therefore, the main reason for the difference in velocities is probably related to the significant heating of the matter and the complex fluid-dynamic situation in the region of the mantle wedge.
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Nurmukhamedov A.G., Sidorov M.D., Moroz Y.F., A model of the deep structure of the Earth’s crust and upper mantle in the area of the Karymshinsky gold-ore cluster according to geophysical data (South Kamchatka), Georesursy (Georesources), 2020, vol. 22, no. 1, pp. 63-72. [In Russian].
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Shapiro N.M., Gorbatov A.V., Gordeev E., Dominguez J., Average shear-wave velocity structure of the Kam- chatka peninsula from the dispersion of surface waves, Earth Planets Space, 2000, vol. 52, pp. 573-577.
Sidorov M.D., Razumny A.V., Isaeva E.P., Crustal model and tectonic zoning of the continent-ocean transition zone in the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt, Regional'naja geologija i metal- logenija (Regional geology and metallogeny), 2020, no. 82, pp. 69-82. [In Russian].
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Vinnik L.P., Reigber C., Aleshin I.M., Kosarev G.L., Kaban M.K., Oreshin S.I., Roecker S., Receiver function tomography of the central Tien Shan, Earth and Planetary Science Letters, 2004, vol. 225, pp. 131-146.
Birch F., The velocity of compressional waves in rocks in 10 kilobars, part 2, J. Geophys. Res., 1961, vol. 66, pp. 2199-2224.
Chebrov V.N., Levina V.I., Lander A.V., Chebrova A.Y., Senyukov S.L., Droznin D.V., Droznina S.Y., Re- gional catalog of earthquakes of Kamchatka and the Commander Islands 1962-2010: technology and methodology of creation, Zemletryaseniya Severnoi Evrazii, 2010 (Earthquakes of Northern Eurasia, 2010), 2016, pp. 396-406. [In Russian].
Dziewonski A.M., Chou T.A., Woodhouse J.H., Determination of earthquake source parameters from waveform data for studies of global and regional seismicity, J. Geophys. Res.: Solid Earth, 1981, vol. 86, pp. 2825- 2852. https://doi.org/10.1029/JB086iB04p02825
Ekstrom G., Nettles M., Dziewonski A.M., The global CMT project 2004–2010: Centroid-moment tensors for 13017 earthquakes, Phys. Earth Planet. Inter., 2012, vol. 200-201, pp. 1-9.
Erlikh E.N., Sovremennaja struktura i chetvertichnyj vulkanizm zapadnoj chasti Tihookeanskogo kol'ca (Modern structure and Quaternary volcanism of the western part of the Pacific Rim), Novosibirsk, Nauka, 1973, 244 p. [In Russian].
Farra V., Vinnik L.P., Upper mantle stratification by P- and S-receiver functions, Geophys. J. Int., 2000, vol. 141, pp. 699-712.
Gontovaya L.I., Popruzhenko S.V., Nizkous I.V., Upper mantle structure in the okean–kontinent transition zone: kamchatka, Journal of Volcanology and Seismology, 2010, vol. 4, no. 4, pp. 232-247.
Gorbatov A., Domınguez J., Suarez G., Kostoglodov V., Zhao D., Gordeev E., Tomographic imaging of the P-wave velocity structure beneath the Kamchatka peninsula, Geophys. J. Int., 1999, vol. 137, pp. 269-279.
Haskell N.A., Crustal reflection of plane P and SV waves, J. Geophys. Res., 1962, vol. 67, pp. 4751-4767. Kennett B.L.N., Engdahl E.R., Traveltimes for global earthquake location and phase identification, Geophys. J. Int., 1991, vol. 105, pp. 429-465.
Kissling E., Ellsworth W.L., Ederhart-Pillips D., Kradolfer U., Initial Reference Models in Local Earthquake Tomography, J. Geophys. Res.: Solid Earth, vol. 99, pp. 19635-19646.
Koulakov I.Y., Dobretsov N.L., Bushenkova N.A., Yakovlev A.V., Slab shape in subduction zones beneath the Kurile-Kamchatka and Aleutian arcs based on regional tomography results, Geologija i geofizika (Geol- ogy and Geophysics), 2011, vol. 52, no. 6, pp. 650-667. [In Russian].
Kuzin I.P., Fokal'naja zona i stroenie verhnej mantii v rajone Vostochnoj Kamchatki (Focal zone and upper mantle structure in the Eastern Kamchatka region), Moscow, Nauka, 1974, 132 p. [In Russian].
Lees J.L., Vandecar J., Gordeev E., Ozerov A., Brandon M.T., Park J., Levin V., Three-dimensional images of the Kamchatka-Pacifi c plate cusp, Volcanism and Subduction: The Kamchatka Region, Volume 172, Washington, American Geophysical Union, 2007, pp. 65-75.
Levin V., Park J., Brandon M., Lees J., Peyton V., Gordeev E., Ozerov A., Crust and upper mantle of Kam- chatka from teleseismic receiver functions, Tectonophysics, 2002, vol. 358, pp. 233-265. https://doi.org/ 10.1016/S0040-1951(02)00426-2
Moroz Y.F., Results of studies of Eastern Kamchatka by a complex of methods of electrical exploration of TT, MTZ, VEZ, Geologija i geofizika (Geology and Geophysics), 1976, vol. 17, no. 10, pp. 140-144. [In Russian].
Moroz Y.F., Jelektroprovodnost' zemnoj kory i verhnej mantii Kamchatki (Electrical conductivity of the Earth's crust and upper mantle of Kamchatka), Moscow, Nauka, 1991, 181 p. [In Russian].
Moroz Y.F., Gontovaya L.I., Deep structure of Kamchatka according to the results of MT sounding and seismic tomography, Russian Journal of Pacific Geology, 2017, vol. 11, pp. 354-367.
Moroz Y.F., Loginov V.A., Ulybyshev I.S., Deep geoelectric cross-section of sredinniy massif, ganalskiy horstanticlinorium and tsentralno-kamchatskiy deflection joint area, Vestnik KRAUNC. Nauki o Zemle (Herald of KRAUNTS. Series: Earth Sciences), 2016, no. 1, iss. 29, pp. 17-34. [In Russian].
Nizkous I.V., Sanina I.A., Kissling E., Gontovaya L.I., Velocity Properties of the Lithosphere in the Ocean– Continent Transition Zone in the Kamchatka Region from Seismic Tomography Data, Izvestiya. Physics of the Solid Earth, 2006, vol. 42, no. 4, pp. 286-296.
Nurmukhamedov A.G., Moroz Y.F., The deep structure of the north-eastern part of the Koryak-Kamchatka folded region according to regional geophysical studies, Geofizicheskij zhurnal (Geophysical Journal), 2009, vol. 31, no. 3, pp. 1-10. [In Russian].
Nurmukhamedov A.G., Sidorov M.D., Moroz Y.F., A model of the deep structure of the Earth’s crust and upper mantle in the area of the Karymshinsky gold-ore cluster according to geophysical data (South Kamchatka), Georesursy (Georesources), 2020, vol. 22, no. 1, pp. 63-72. [In Russian].
Press W.H., Teukolsky S.A., Vetterling W.T., Flannery B.P., Numerical Recipes 3rd Edition: The Art of Scientific Computing, New York, Cambridge University Press., 2007, 1256 p.
Shapiro N.M., Gorbatov A.V., Gordeev E., Dominguez J., Average shear-wave velocity structure of the Kam- chatka peninsula from the dispersion of surface waves, Earth Planets Space, 2000, vol. 52, pp. 573-577.
Sidorov M.D., Razumny A.V., Isaeva E.P., Crustal model and tectonic zoning of the continent-ocean transition zone in the Chukchi-Koryak-Kamchatka sector of the Pacific Fold Belt, Regional'naja geologija i metal- logenija (Regional geology and metallogeny), 2020, no. 82, pp. 69-82. [In Russian].
Vinnik L.P., Receiver Function Seismology, Izvestiya. Physics of the Solid Earth, 2019, vol. 55, no. 1, pp. 12-21. DOI: 10.1134/S1069351319010130
Vinnik L.P., Reigber C., Aleshin I.M., Kosarev G.L., Kaban M.K., Oreshin S.I., Roecker S., Receiver function tomography of the central Tien Shan, Earth and Planetary Science Letters, 2004, vol. 225, pp. 131-146.
