DOI: https://doi.org/10.24028/gzh.0203-3100.v37i1.2015.111323

A map of absolute values for gravity fields of Ukraine and some aspects of its possible interpretation

V.A. Entin, S.I. Guskov, M.I. Orlyuk, O.B. Gintov, R. Osmak

Abstract


An electronic map of absolute values of gravity field (Gн) has been plotted for the territory of Ukraine for the first time with application of combined electronic matrices of Buge anomalies in case of the density of intermediate layer 2.3 g/cm3 and the values of altitude marks (the Baltic system). The size of unit cell of the matrix is 1´1 km, the error obtained for the map interpolation Gн for flat country is ±2,1 mGal. It has been shown that the maps of Gн give more complete information on tectonic processes, taking part in the Earth’s crust formation because they reflect combined effects of density and relief-producing factors, which are not taken into account while maps of Buge anomalies are being analyzed. Examples have been given of large lineaments of tectonic origin, clearly visible on Gн map and practically unnoticeable on the map of Buge anomalies.  Comparison of anomalies of Gн and Buge (2,3 g/cm3) in mountain areas (Crimea, Carpathians) gives an idea of hypogenous nature of gravity objects, and large regional differences of anomalies Gн, which are as big as 950 mGal within the limits of Ukraine must be taken into account while problems of geophysical ecology and compiling meteorology forecasts are being solved. A necessity is being indicated to introduce maps of Gн field to a set of gravimetric materials used for geological-geophysical interpretation. In this connection we propose to introduce in the running regulations for gravity works a demand on presenting a map of observed gravity field as a report.


Keywords


absolute gravity field; relief; tectonics; environment

References


Entin V. A., 2005. Geophysical basis tectonic maps of Ukraine, scale 1: 1 000 000. Geofizicheskiy zhurnal 27(1), 74—85 (in Russian).

Entin V. A., 2012. Natural geophysical phenomena of Ukraine. Guidebook. Kiev: UkrDGRI, 75 p. (in Russian).

Entin V. A., Gintov O. B., Guskov S. I., 2010. Again about the nature of the Crimean gravity anomaly. Geofizicheskiy zhurnal 32(6), 119—134 (in Russian).

Instructions gravity. Moscow: Nedra, 1980. 80 p. (in Russian).

Orlyuk M. I., 2001. Geophysical environment — the main challenges and solutions. Geofizicheskiy zhurnal 23(1), 49—59 (in Ukrainian).

Orlyuk M. I., Romenets A. A., 2005. New criterion for evaluating spatial and temporal disturbance of the magnetic field of the Earth, and some aspects of its use. Geofizicheskiy zhurnal 27(6), 1012—1023 (in Russian).

Starostenko V. I., Kanevskiy V. A., Entin V. A., Gintov O. B., Guskov S. I., Morenkov E. D., Blazer N., Meskenayt V., Lipp H.-P., 2012. Navigation features of pigeons flying in the gravitational field of Ukraine. Geofizicheskiy zhurnal34(2), 20—35 (in Russian).