REGIONAL STRUCTURAL‐TECTONIC ZONING OF THE UPPER CRUST OF TRANSBAIKALIA BASED ON SEISMOGRAVITATIONAL DATA ALONG REFERENCE PROFILE 1‐SB
https://doi.org/10.5800/GT-2018-9-2-0355
Abstract
Upper crust fault and fold patterns are studied with an innovative approach of controlled‐source seismic refraction profiling integrated with gravity data. The potentiality of the conventional method based on refrac‐ tion/wide‐angle reflection traveltimes, which has been so far applied to plane‐parallel layered earth, is extended onto deformed crust with lateral and vertical inhomogeneities due to advanced processing technologies. Performance of the approach is tested on data of the 1‐SB transect that traverses geologically studied areas and provides good refer‐ ence. Upper crust features revealed from seismic data agree with known geological structures, this indicating the basic applicability of refraction surveys to tectonically complex areas with 7 to 10 km wide low‐angle dipping fault zones between blocks marked by velocity anomalies to depths of 4–6 km. Joint interpretation of refraction and gravity patterns becomes possible within the limits of a seismic‐gravity model in which both are characterized by seismic‐ density and seismic acceleration values of the same dimension.
About the Authors
V. D. Suvorov
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of RAS
Russian Federation
Russian Federation
Doctor of Geology and Mineralogy, Chief Researcher,
3 Academician Koptug ave., Novosibirsk 630090
E. A. Melnik
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of RAS
Russian Federation
Russian Federation
Candidate of Geology and Mineralogy, Head of Laboratory,
3 Academician Koptug ave., Novosibirsk 630090
E. V. Pavlov
A.A. Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of RAS
Russian Federation
Russian Federation
Candidate of Technical Sciences, Researcher,
3 Academician Koptug ave., Novosibirsk 630090
A. S. Salnikov
Siberian Research Institute of Geology, Geophysics and Mineral Resources
Russian Federation
Russian Federation
Doctor of Geology and Mineralogy, Head of Section,
67 Krasnyy ave., Novosibirsk 630091
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For citations:
Suvorov V.D., Melnik E.A., Pavlov E.V., Salnikov A.S. REGIONAL STRUCTURAL‐TECTONIC ZONING OF THE UPPER CRUST OF TRANSBAIKALIA BASED ON SEISMOGRAVITATIONAL DATA ALONG REFERENCE PROFILE 1‐SB. Geodynamics & Tectonophysics. 2018;9(2):439-459. (In Russ.) https://doi.org/10.5800/GT-2018-9-2-0355
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