Structure of the Northwestern Boundary of the Middle Amur Sedimentary Basin (Russian Far East) from Audiomagnetotelluric Sounding Data
This paper reports the data on the structure of the northwestern boundary of the Middle Amur sedimentary basin which were obtained after resumption of audiomagnetotelluric soundings. The geoelectric sections for two profiles across the basin strike are constructed, the sedimentary cover and basement structures are studied, and their electrical properties are determined. The compared data of the earlier and present studies show low-resistivity zones of 50–150 Ohm m beneath high-resistivity rocks of 500–1000 Ohm m in the northwestern part of the Ul’dura–Churki uplift at a 2–4 km depth, which are absent in the southwestern part of the uplift. This fact is related to strike-slip–overthrust processes due to graben formation in the area of junction with the Jiamusi–Bureya Massif in the Kur fault zone (YYilan–Yitong branch of the Tan-Lu fault zone) and also to global left-lateral strike-slip displacements and volcanic activity.
Keywordsaudiomagnetotelluric soundings deep structure Middle Amur sedimentary basin Kur Fault Far East of Russia
Unable to display preview. Download preview PDF.
- 1.M. N. Berdichevskii and V. I. Dmitriev, Magnetotelluric Models and Methods (Nauch. mir, Moscow, 2009) [in Russian].Google Scholar
- 2.V. G. Varnavskii, Paleogene and Neogene Sediments of the Middle Amur Basin (Nauka, Moscow, 1971) [in Russian].Google Scholar
- 3.Geological Map of the Amur Region and Adjacent Territories. 1: 2 500 000: Explanatory Note, (St. Petersburg–Blagoveshchensk-Harbin, 1999) [in Russian].Google Scholar
- 4.M. A. Goncharov, N. S. Frolova, and P. N. Rozhin, “Convective evolution of transition from passive to active rifting,” in Continental Rifting and Related Processes. Proceedings of 2nd All-Russian Symposium with International Participation. Youth School in Memory of the Academician N.A. Logachev and E.E. MYilanovsky, Irkutsk, Russia (Inst. zemnoi kory SO RAN, Irkutsk, 2013), Vol. 1, pp. 86–89 [in Russian].Google Scholar
- 5.State Geological Map of the Russian Federation. 1: 1000000 (Third Generation). Far East Series. Sheet M-53. Khabarovsk: Explanatory Notes (Kartfabrika VSEGEI, St. Petersburg, 2009) [in Russian].Google Scholar
- 6.V. Yu. Zabrodin, O. V. Rybas, and G. Z. Gil’manova, Fault Tectonics of the Continental Part of the Russian Far East (Dal’nauka, Vladivostok, 2015) [in Russian].Google Scholar
- 9.T. V. Merkulova and Yu. F. Manilov, “Structure of the southwestern Middle Amur Basin: (geoelectric and gravimetric data),” Tikhookean. Geol. 17 (4), 116–120 (1998).Google Scholar
- 10.T. V. Merkulova and G. L. Kirillova, “Structure and prospects of petroleum potential of the northern chains of the Yitong-Yilan branch of the Tan-Lu Fault,” Tikhookean Geol. 23 (6), pp. 55–75 (2004).Google Scholar
- 11.S. V. Potap’ev, “Relationship of surface and deep structure of the Earth’s crust of the Amur region and Primorye,” in Deep Lithosphere Structure of the Far East Region: Geophysical Data (Vladivostok, 1980) [in Russian].Google Scholar
- 12.Middle Amur Sedimentary Basin: Geological Structure, Geodynamics, and Fuel-Energy Resources, Ed. by G.L. Kirillova and A.I. Khanchuk (DVO RAN, Vladivostok, 2009) [in Russian].Google Scholar
- 14.Physical Properties of Rocks and Mineral Resources (Petrophysics). A Reference Book of Geophysist (Nedra, Moscow, 1976) [in Russian].Google Scholar