The Region of Matching of Central-Asian Mobile Belt and Pacific Mobile Belt
- 1 Far Eastern Russian Academy of Sciences, Institute of Geology and Nature Management, Blagoveschensk, Russia
Abstract
Central Asian and Pacific mobile belts are the two geological superstructures of Eastern Asia. They keep many geo logical secrets. There is a region of the interaction of the structures in the frames of the margin ofEast Asia. The region is ambiguous. It is denominated in tectonic superposition or covering (interference) of the segments of the structures. The main goal of the research work is to establish the boundary line of the jointing of two superstructures. Here we show the role of the Mesozoic tectonic restructuring and magmatism in the interaction of the structures. The region of their jointing is the boundary line between Bureja-Jziamusy and Badzhal terrains. The boundary line in the frames of Mongol-Okhotsk orogenic belt is disputable. Geochronological and paleomagnetic data and chemical composition of the volcano-plutonic rocks of the eastern margin of Mongol-Okhotsk belt and of the structures of Central-Asian mobile belt were recently obtained. The data allow us to review the region of the joint of the two structures of easternAsia. It was suggested to draw the boundary line of the joint (in this case - interference) of Central Asian mobile belt and Pacific mobile belt in the frames of the eastern margin of Mongol - Okhotsk orogenic belt along the margin of the disappearance of late Mesozoic oversubductional volcano-plutonic complexes in the western direction. The structure of Bureja-Jzia musy superterrain was related to the structures of the Pacific mobile belt. The proposed model of the region of jointing of two East Asian superstructures enables us to reconsider the tectonic and geodynamical and metallogeny schemes of evolution of the Eastern margin ofAsia.
- L. M. Parfenov, N. A. Berezin, A.I. Khanchuk, G. Badarh, V. G. Belichenko, A. N. Bulgatov, S. I. Drill, G. L. Kirillova, M. I. Kuzmin, U. Nokleberg, A. V. Prokopiev, V. F. Timofeev, O. Tomurtogoo and H. Yan, “The Model of the Formation of the Orogenic Belts of Central and Northern-Eastern Asia,” Russian Journal of Pacific Geology, Vol. 22, No. 6, 2003, pp. 7-41.
- G. A. Shatkov and A. S. Volsky, “Tectonics, Deep Structure and Minerageny of the Amur Region and Adjacent Areas,” VSEGEI Press, St.-Petersburg, 2004.
- G. A. Shatkov and A. S. Volsky, “Tectonics, Deep Structure and Metalogeny of the Region of Joining of Central Asian and Paciffic Belts,” FEB RAS Press, Vladivostok, 2005.
- Y. F. Malyshev, V. Y. Podgorny, B. F. Shevchenko, N. P. Romanovsky, V. B. Kaplun and P. Y. Gornov, “Deep Structure of the Bounding Zone Structures of the Amur Lithospheric Plate,” Russian Journal of Pacific Geology, Vol. 26, No. 2, 2007, pp. 3-17.
- L. M. Parfenov, L. I. Popeko and O. Tomurtogoo, “The Problems of Tectonics of Mongol-Okhotsk Orogenic Belt,” Russian Journal of Pacific Geology, Vol. 18, No. 5, 1999, pp. 24-43.
- A. I. Khanchuk, “Geodynamics, Magmatism and Metallogeny of the Russian East,” Dalnauka Press, Vladivostok, 2006.
- G. L. Kirillova and M. T. Turbin, “Formations and Tectonics of Dzhagdinsk Unit of Mongol-Okhotsk Forlded Region,” Nauka, Moscow, 1979.
- I. M. Derbeko, “Scheme of the Formation of Magmatic Complexes of the Selitkan Volcano-Plutonic Zone, the Eastern Flank of the Mongol-Okhotsk Orogenic Belt (Russia),” Geochemistry International, Vol. 47, No. 11, 2009, pp. 1083-1099. doi:10.1134/S0016702909110044
- I. M. Derbeko, A. A. Sorokin, V. A. Ponomarchuk, A. V. Travin and A. P. Sorokin, “First Geochronological Data on Felsic Lavas from the Ezop-Yamalin Volcanoplutonic Zone, Khingan-Okhotsk Volcanogenic Belt,” Doklady Earth Sciences, Vol. 419, No. 2, 2008, pp. 231-234. doi:10.1134/S1028334X08020098
- I. M. Derbeko, A. A. Sorokin, E. B. Sal’nikova, A. B. Kotov, A. P. Sorokin, S. Z. Yakovleva, A. M. Fedoseenko and Y. V. Plotkina, “Age of Felsic Volcanism in the Selitkan Zone of the Khingan-Okhotsk Volcanoplutonic Belt, Russian Far East,” Doklady Earth Sciences, Vol. 418, No. 1, 2008, pp. 28-31. doi:10.1134/S1028334X08010078
- I. M. Derbeko, A. A. Sorokin and S. G. Agafonenko, “Geochemical Features of Felsic Magmatism on the North-Western Flank of the Khingan-Okhotsk Volcanoplutonic Belt: Ezop and Yam-Alin Zones,” Russian Journal of Pacific Geology, Vol. 27, No. 2, 2008, pp. 54-63.