Seismic geotraverse "Granit" (Ukrainian part). Reanimation

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Authors:


P.I.Pigulevskiy, orcid.org/0000-0001-6163-4486, Dnipropetrovsk Geophysical Expedition Dniprogeofizika, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.M.Stovas, orcid.org/0000-0002-2294-9626, Norwegian University of Science and Technology, Trondheim, the Kingdom of Norway, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.


повний текст / full article



Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2022, (4): 011 - 016

https://doi.org/10.33271/nvngu/2022-4/011



Abstract:



Purpose. To acquaint a wide range of geologists and geophysicists with the results of research on the Granit geotraverse.


Methodology. The studies were carried out by the methods of reflected waves and a common midpoint (CMP). The basic parameters of the acquisition system are: one side; fold is 12; central (when detailing, a fold is 24); the source step is 200 m; step and the receiver step is 50 m; the offset step is 100 m; cable length is 4,750 m; the maximum offset is 4,850 m. The recorded time length on the entire profile is 30 seconds. The source of excitation of elastic vibrations is explosion in wells with a mass of charge of 15 kg.


Findings. Geotraverse Granit passes through Odesa, Mykolaiv, Dnipro, Kharkiv regions and crosses the large geological structures: South Ukrainian monocline, Ukrainian shield, Dnieper-Donetsk depression. Sections of all geostructures are characterized by a high level of saturation by short, unevenly distributed reflective elements occupying positions from sub-horizontal to steeply inclined ones in space from. The reflective elements carry information about the nature of stratification, deformation and stress state of the structures of the consolidated crust and the upper mantle. The consolidated crust and the upper mantle have a complicated surface-block structure that is subject to certain spatial-correlated connections. The crust-mantle transition is a complex laterally changeable area, with a thickness of 3 to 7 km, determined by systems of sub-horizontal stratifications, expressed by the concentration of reflection zones.


Originality. Research on the Granit geotraverse allowed completing information on the seismic model of the crust and upper mantle of the territory of Ukraine. A number of new fracturing structures and gently sloping faults require further analysis in combination with other geological and geophysical studies on the potentiality of their ore genesis.


Practical value. The results of the studies on the Ukrainian part of the Granit geotraverse supplement the gap in the consolidated profile with a length of 3,600 kilometers (Urengoy Verkhnyaya Tura Kryvyi Rih) and create a reference section of the continental crust to solve geological problems on the evolution and geodynamics of the lithosphere.



Keywords: seismic surveying, reflection seismic survey, common depth point method, geotraverse, reflection elements

References.


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