BUILDING A TOMOGRAPHIC VELOCITY MODEL FOR SAMOYLOV ISLAND AREA (LENA DELTA) FROM LOCAL SEISMOLOGICAL DATA FOR THE PERIOD OF 2019

BUILDING A TOMOGRAPHIC VELOCITY MODEL FOR SAMOYLOV ISLAND AREA (LENA DELTA) FROM LOCAL SEISMOLOGICAL DATA FOR THE PERIOD OF 2019–2021

Published:2022-04-18 Issue: Volume: Page:
ISSN:2078-502X
Container-title:Geodynamics & Tectonophysics
language:
Short-container-title:Geodin. tektonofiz.

Author:

Dergach P. A.¹,Eponeshnikova L. Y.¹,Ponasenko S. N.¹,Kartoziia A. A.²,Geissler W. H.³,Duchkov A. A.¹,Shibaev S. V.⁴,Zobnin G. Y.¹

Affiliation:

1. Novosibirsk State University; Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences

2. Novosibirsk State University; Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences; Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences

3. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research

4. Yakut Branch of the Federal Research Center of the Geophysical Survey, Russian Academy of Sciences

Abstract

In our paper we present the results of seismotomographic inversion for the local seismological monitoring data obtained in the area of the Samoylov Island (Lena River delta) in 2019–2021. Tomographic velocity model was used for refining hypocenter locations of local earthquakes and for geological interpretation. The results are shown as maps of anomalies of seismic waves and Vp /Vs ratios for the 5 and 10 km depths. The velocity anomalies structure made it possible to interpret low Vp /Vs ratio as rocks related to the Siberian platform, and to compare between the boundary of the low Vp /Vs area and the trace of the known geological fault running along the Olenekskaya Channel.

Publisher

Institute of Earth's Crust, Siberian Branch of the Russian Academy of Sciences

Subject

Earth-Surface Processes,Geophysics,Geology,Economic Geology

Reference16 articles.

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2. Dergach P.A., Ponasenko S.N., Eponeshnikova L.Y., Zobnin G.Y., Potapov V.V., Kartoziia A.A., Geissler W.H., Gukov S.A., Shibaev S.V., Tuktarov R.M., 2022 (in print). Seismological Observations in Samoylov Island Area of the Lena Delta. In: Russian-German Cooperation: Expeditions to Siberia in 2021. Reports on Polar and Marine Research. Alfred Wegener Institute for Polar and Marine Research, Bremerhaven.

3. Dergach P.A., Tubanov C.A., Yushin V.I., Duchkov A.A., 2019. Features of Software Implementation of Low-Frequency Deconvolution Algorithms. Seismic Instruments 55, 345–352. https://doi.org/10.3103/S0747923919030046.

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