TECHNOLOGY AND RESUSLTS OF SEISMOTECTONIC ANALYSIS WHEN IDENTIFYING AND ESTIMATING TRAVELTIME CHARACTERISTICS OF DEEP FAULTS IN THE EARTH’S CRUST: THE CASE OF GEOTRAVERSE 1-SB IN TRANSBAIKAL

D. I. Rudnitskaya, M. V. Kornilov, E. V. Mosyagin

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

The ReapakRK+ soft ware system enabled the development of a seismotectonic analysis technology to be applied to the heterogeneous medium of the Earth’s crust. The technology, together with the use of ultra-deep CDP data from Geotraverse 1-SB in Transbaikal, allowed us to gain a new vision of the tectonic structure of the Earth’s crust in the region. In particular, signatures of deep faults with traveltime characteristics of horizontal displacement have been identified in the area pertaining to the Mongolian-Transbaikalian folding region and the Prishilkinskaya shear zone. Possible main channels of flowing of magmatic melts and thermal solutions in the upper crust and magmatic chambers of their possible accumulation were identified from the structure and attribute characteristics of the segments of these faults. These data are important in searching and prospecting for ore deposits in the south-eastern Transbaikal.

Keywords: Reapak attributes, CDP section, seismic inversion, ECO section, reflectors, faults, shears, pullapart structures.

DOI 10.20403/2078-0575-2017-6s-147-155