Abstract
This study is concerned with quantitative estimation of the relationship between earthquakes and tectonic crustal fragmentation based on a correlation analysis of fault density with seismicity parameters (the number and energy of earthquakes per unit area) for the Sredne-Yamskoi seismic junction and adjacent area. The highest level of seismic activity and the highest probability of earthquake occurrence with energy classes K ≥ 12 within areas that have a continental crust with a well-pronounced granite layer occur in those areas with the mean fault density. Within areas with a thinner granite layer in the crust, the most likely seismic events are K ≥ 12 earthquakes that occur in areas with lower fault density. We estimated the relationship between the degree of crustal fragmentation and the topography of stratification interfaces in the crust as identified by new interpretative gravimetry. Zones with the lowest degree of fragmentation tend to be areas where the top of the crystalline basement lies deeper.
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References
Andreev, T.A. and Shishchenko, A.P., Estimating the Recurrence of Intensity in the Magadan Area, in Seismologicheskie i petrofizicheskie issledovaniya na Severo-Vostoke Rossii (Seismological and Petrophysical Research in the Russian Northeast), Magadan: SVKNII DVO RAN, 1992, pp. 38–52.
Belyi, V.F., Geologiya Okhotsko-Chukotskogo poyasa (The Geology of the Sea-of-Okhotsk-Chukchi Belt), Magadan: SVKNII DVO RAN, 1994.
Geologicheskaya karta i karta poleznykh iskopaemykh Kolymo-Omolonskogo regiona (A Geological Map and a Map of Mineral Deposits for the Kolyma-Omolon Region), Scale 1: 500000, Explanatory Note, Simakov, K.V., Ed., Magadan: GP Magadangeologiya, 1998.
Geologicheskaya karta i karta poleznykh iskopaemykh Okhotsko-Kolymskogo regiona (A Geological Map and a Map of Mineral Deposits for the Sea-of-Okhotsk-Kolyma Region), Scale 1: 500000, Expanatory Note in four books. Book 1. A Geological Description. Mineral Deposits, Mineragenic Regionalization and a Predictive Assessment of the Region, Sosunov, G.M., Ed., Magadan: GP Magadangeologiya, 1999.
Kuznetsov, V.M., Deep-Seated Faults and Patterns Observable in Their Locations in the Kolyma-Omolon Interfluve Area, Kolyma, 1994, no. 6, pp. 7–11.
Nekrasov, G.E., Tektonika i magmatism Taigonosa i Severo-Zapadnoi Kamchatki (The Tectonics and Magmatism of Taigonos and Northwestern Kamchatka), Moscow: Nauka, 1976.
Rautian, T.G., On Determining Earthquake Energy at Distances below 3000 km, in Eksperimental’naya seismika (Experimental Seismology), Trudy In-ta Fiziki Zemli AN SSSR, 1964, no. 32 (193), pp. 86–93.
Strukturno-formatsionnaya karta Okhotsko-Chukotskogo vulkanogennogo poyasa m-ba 1: 1500000 (A Structural-Formation Map for the Sea-of-Okhotsk-Chukchi Volcanogenic Belt, Scale 1: 1500000), Shilo, N.A., Editor-in-Chief, 1977.
Surkov, V.S., Zinnatulin, M.Z., Lipilin, A.V., et al., Deep Crustal Structure along Leg 2 DV Based on Gravity and Air-Borne Magnetic Data, in Proc. All-Russia Conf. Geodinamika, magmatizm i minerageniya kontinental’nykh okrain Severa Patsifiki (Geodynamics, Magmatism, and Mineralization in Continental Margin of the North Pacific), vol. 1, Magadan, 2003, pp. 66–69.
Vashchilov, Yu.Ya., Glubinnye gravimetricheskie issledovaniya (Gravimetric Studies of Deep Earth Structure), Moscow: Nauka, 1973.
Vashchilov, Yu.Ya., Seismicity and Issues in the Deep Structure of the Northeastern USSR, in Geofizicheskie issledovaniya struktury i geodinamiki zemnoi kory i verkhnei mantii Severo-Vostoka SSSR (Geophysical Studies in the Structure and Geodynamics of the Crust and Upper Mantle in the Northeastern USSR), Magadan: SVKNII DVO RAN, 1979, pp. 138–157.
Vashchilov, Yu.Ya., A New Interpretative Gravimetry—instead of and together with Deep Seismic Studies. Paper 1. Methodological Principles of the New Interpretative Gravimetry, Vestnik SVNTs DVO RAN, 2005, no. 3, pp. 2–16.
Vashchilov, Yu.Ya., Gaidai, N.K., and Sakhno, O.V., A 3-D Deep, Density Model of the Pautovskii Horst and Its Geological Interpretation (Russian Northeast), Tikhookeanskaya Geologiya, 2008, vol. 27, no. 4, pp. 22–38.
Vashchilov, Yu.Ya. and Kalinina, L.Yu., Deep-Seated Faults and Lineaments, and the Location of Earthquake Epicenters in the Russian Northeast on Land, Vulkanol. Seismol., 2008, no. 3, pp. 19–31 [J. Volcanology and Seismology, 2008, vol. 2, no. 3, pp. 158–169].
Vashchilov, Yu.Ya. and Kalinina, L.Yu., The Structural Position of Earthquakes Relative to Elements of Deep-Seated Fault Tectonics and Their Interpretation for the Magadan Shelf of the Sea of Okhotsk, Vulkanol. Seismol., 2009, no. 6, pp. 54–61 [J. Volcanology and Seismology, 2009, vol. 3, no. 6, pp. 414–420].
Vazhenin, B.P., Mishin, S.V., and Sharafutdinova, L.V., Zemletryaseniya Magadanskoi oblasti (Earthquakes in Magadan Oblast), Magadan: SVKNII DVO RAN, 1997.
Yugova, R.S., Andreev, T.A., Gunbina, L.V., et al., The Seismicity of Omsukchan District, in Seismologicheskie i petrofizicheskie issledovaniya na Severo-Vostoke Rossii (Seismological and Petrophysical Research in the Russian Northeast), Magadan: SVKNII DVO RAN, 1992, pp. 26–37.
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Original Russian Text © N.K. Gaidai, L.Yu. Kalinina, 2011, published in Vulkanologiya i Seismologiya, 2011, No. 6, pp. 71–78.
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Gaidai, N.K., Kalinina, L.Y. Fault density, earthquakes, and the topography of crustal stratification interfaces: Central Magadan Oblast. J. Volcanolog. Seismol. 5, 431–437 (2011). https://doi.org/10.1134/S0742046311050046
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DOI: https://doi.org/10.1134/S0742046311050046