Abstract
The materials of deep seismic studies carried out on the 1-SB reference geophysical profile and the areal interpretation of the seismological data obtained in the Trans-Baikal part of the Central Asian Fold Belt are presented. It is shown that longitudinal and transverse waves were recorded from the reference boundaries within the crust and the Moho surface in the Trans-Baikal region using explosions and powerful vibration sources on the 1200-km long 1-SB geophysical profile. The inhomogeneous upper crust velocity structure down to 15–20-km depths and the Moho surface was revealed from P- and S-waves. The anomalous mantle, which exhibited decreased boundary velocity values of P- and S-waves at 7.8–7.95 km/s and 4.3–4.5 km/s, respectively, was reliably traced within the Baikal Rift Zone from the DSS and seismological data. In the southeastern part of the area (the central Mongol-Okhotsk Orogenic Belt and adjacent folded structures of the Trans-Baikal region) a layer of increased P-and S-wave velocity values of 8.4 ± 0.15 km/s and 4.9 ± 0.05 km/s, accordingly, was detected at the mantle surface. A comparison was made with the materials of other studies.
Similar content being viewed by others
REFERENCES
L. P. Vinnik, S. I. Oreshin, L. R. Tsydypova, V. V. Mordvinova, M. M. Kobelev, M. A. Khritova, and Ts. A. Tubanov, “Crust and mantle of the Baikal rift zone: data on receiving functions of the P- and S‑waves,” Geodynamics & Tectonophysic 8 (4), 2017.
E. Yu. Goshko, V. V. Zhabin, and A. S. Sal’nikov, “Structure of the Earth’s crust in the junction zone of the Aldan—Stanovoi shield and Sayan—Baikal fold area along the reference profile 1-SB,” Geology and Mineral—Raw Resources of Northeastern Russia. Proc. 8th All-Russian Scientific—Practical Conference (Dom. Inst. Merzlotovedeniya im. P.I. Mel’nikova, Yakutsk SO RAS, 2018), Vol. 2, 52–55 (2018).
A. N. Didenko, A. S. Efimov, P. A. Nelyubov, A. S. Sal’nikov, V. S. Starosel’tsev, B. F. Shevchenko, M. V. Goroshko, V. A. Gur’yanov, and N. G. Zamozhnyaya, “Structure and evolution of the Earth’s crust in the region of junction of the Central Asian Fold Belt and the Siberian Platform: Skovorodino-Tommot Profile,” Russ. Geol. Geophys. 54 (10), 1236–1249 (2013).
S. N. Kashubin, O. V. Petrov, E. D. Mil’shtein, I. V. Kudryavtsev, E. A. Androsov, I. Yu. Vinokurov, O. A. Tarasova, and Yu. M. Erinchek, “Deep structure of the Earth’s crust and upper mantle of Northeastern Eurasia,” Regional. Geol. Metallogen. No. 76, 9–21 (2018).
S. V. Krylov, M. M. Mandel’baum, V. S. Seleznev, V. M. Solov’ev, and V. D. Elinov, “Detailed deep seismic studies in the Upper Angara area of the Baikal rift zone,” Geol. Geofiz. 31 (7), 17–27 (1990).
B. P. Mishen’kin, Z. R. Mishen’kina, G. V. Petrik, I. F. Shelud’ko, M. M. Mandel’baum, V. S. Seleznev, and V. M. Solov’ev, “Deep seismic sounding of the Earth’s crust and upper mantle in the Baikal Rift Zone,” Izv. Phys. Solid Earth 35 (7–8), 594–611 (1999).
Baikal Interior (Seismic Data), Ed. by N.N. Puzyrev (Nauka, Novosibirsk, 1981) [in Russian].
G. Nolet, Seismic Tomography. With applications in Global Seismology and Exploration Geophysics (Reidel, Dordrecht, 1987).
L. M. Parfenov, N. A. Berzin, A. I. Khanchuk, G. Badarch, V. G. Belichenko, A. N. Bulgatov, S. I. Dril’, G. L. Kirillova, M. I. Kuzmin, U. Nokleberg, A. V. Prokop’ev, V. F. Timofeev, O. Tomurtogoo, and H. Yan, “Model of formation of orogenic belts of Central and Nothreastern Asia,” Tikhookean. Geol. 22 (6), 1–41 (2003).
V. M. Solov’ev, A. S. Sal’nikov, V. S. Seleznev, S. A. Elagin, I. E. Romanenko, and N. A. Galeva, “Deep seismic studies at the Baikal—Patom fragment of the eastern segment of reference profile 1-SB,” Interekspo Geo-Sibir’ 3, 106–112 (2017).
V. M. Solov’ev, V. S. Seleznev, A. S. Sal’nikov, A. V. Liseikin, I. E. Romanenko, S. A. Elagin, A. E. Shenmaier, and N. A. Serezhnikov, “Deep structure of the Transbaikalian part of the Central Asian fold belt: DSS data (in the cross section of the reference profile 1-SB),” in Geology, Geophysics, and Mineral Raw Material of Siberia (SNIIGGiMS, Novosibirsk, 2017), Vol. 4, No. 4, pp. 91–103 [in Russian].
V. M. Soloviev, V. V. Chechel’nitskii, A. S. Sal’nikov, V. S. Seleznev, A. V. Liseikin, and N. A. Galeva, “Specific velocity structure of the upper mantle in the Transbaikalian segment of the Mongolia—Okhotsk orogenic belt,” Geodynamics & Tectonopys. 8 (4), 1065–1082 (2017).
V. P. Solonenko, “Seismotectonics and modern structural evolution of the Baikal rift zone,” in Baikal Rift (Nauka, Moscow, 1968), pp. 57–71 [in Russian].
B. F. Shevchenko, M. V. Goroshko, A. N. Didenko, V. A. Gur’yanov, V. S. Starosel’tsev, and A. S. Sal’nikova, “The junction of the Eastern Central Asian fold belt and the Siberian Platform: deep structure and Mesozoic tectonics and geodynamics,” Russ. Geol. Geophys. 52 (12), 1672–1679 (2011).
Eclogites and Glaucophane Scists in Fold Areas, Ed. by N. L. Dobretsov, N. V. Sobolev, V. S. Shatskii, et al., (Nauka, SO, Novosibirsk, 1989) [in Russian].
Yu. M. Erinchek, A. V. Lipilin, R. B. Serzhantov, S. N. Kashubin, and E. D. Mil’shtein, “State netrowk of reference Geological—geophysical profiles, parametric and superdeep wells,” Reports of International Conference Dedicated to 100th Anniversary of N.N. Puzyrev (Izd-vo SO RAN, Novosibirsk, 2014), pp. 282–288 [in Russian].
U. S. Ten Brink and M. H. Taylor, “Crustal structure of central Lake Baikal: insights into intracontinental rifting,” J. Geophys. Res. 107 (2002). https://doi.org/10.1029/2001JB000300
C. Nielsen and H. Thybo, “Lower crustal intrusions beneath the southern Baikal Rift Zone: evidence from full-waveform modelling of wide-angle seismic data,” Tectonophysics 470, 298–318 (2009).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Recommended for publishing by A.N. Didenko
Translated by N. Kovriga
Rights and permissions
About this article
Cite this article
Solovyev, V.M., Salnikov, A.S., Seleznev, V.S. et al. The Features of the Deep Velocity Structure of the Trans-Baikal Section of the Central Asian Fold Belt from the Seismological and DSS Data (Alignment of the 1-SB Reference Profile). Russ. J. of Pac. Geol. 14, 434–446 (2020). https://doi.org/10.1134/S1819714020050073
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1819714020050073