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Geoinformatika 2020; 3(75) : 83-91

УДК 550.831.23+550.83.001.5+550.83:528.94+550.83.053:681.3

RESULTS OF FORMATION OF THE GRAVIMETRIC BASE IN UKRAINE

V.K. Svistun1, V.O. Antonov1, P.G. Pigulevskiy2

1Dnepropetrovsk Geophysical Expedition «Dneprogeophysics» State Geophysical Enterprise «Ukrgeofizika», str. Geophysical, 1, Dnipro, Ukraine, 49057, e-mail: dpge@ukr.net
2S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, 34, Acad. PalladinaAv., Kyiv, Ukraine, 03680, e-mail: pigulev@ua.fm

Introduction and problem definition. The results of the work of the Dnepropetrovsk geophysical expedition “Dneprogeofizika” about collecting, analyzing and forming an electronic database of gravimetric data (EDGD) of the territory of Ukraine are discuss in the article. Based on the results of the work, systematization of the materials of gravimetric surveys was carried out and a modern electronic EDGD of observations of the gravitational field of Ukraine which includes data on all conditioned gravity surveys in scale 1 : 200 000 – 1 : 10 000 was made. The main volumes of gravimetric surveys in scale 1 : 50 000 were performed during the 1960–1990 years.

Purpose of studies. The EDGD was created with the aim of systematizing, reliable storage and operational use of digital data from gravimetric surveys of past years to build gravimetric maps of different territories and scales.

Methods. The attributes of electronic EDGD include the main parameters of gravity surveys: aria coordinates of gravimetric points (X, Y) in the coordinate system of Gauss-Krueger, Pulkovo, 1942 (SK-42); the height of points (H) according to the Baltic system; the value of the anomalies in the Bouguer reduction with the density of the intermediate layer 2,67 g/cm3.

Results. As an example, maps of the anomalous gravitational field are given according to sheet M-37-XXXI (Ternovka) in the scale 1 : 200 000 which based on the surveys in scale 1 : 200 000 – 1: 100 000 and M 1: 50 000 – 1: 25 000. The first are more integrated and can be effectively used in regional structural – tectonic zoning, the second – in their detailing. Compression of the large surveys during the small-scale maps building allows to obtain additional information about the structural features of each tectonic unit. The anomalous gravitational field displays the structural features of the earth’s crust both in plan and in depth is shown. Its tectonic interpretation requires taking into account the structural features of different geological objects depending on the depth of their occurrence.

Prospects for the further studies. Electronic database of gravimetric data allows to build maps of the gravitational field and their transformants for any territory of Ukraine and is important in the analysis of the tectonic structure of the territory of Ukraine for the search for various types of minerals and are necessary and obligatory in the compilation of tectonic maps and diagrams in the process of geological study of areas (GSA-200) with the subsequent formation of a set of maps of the State Geological Map-200.

Keywords: gravitational field, gravitational survey, database, structural-tectonic zoning.

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Receive 11.08.2020