GRAVITY DATA-BASED MORPHOLOGY OF GRANITE MASSIFS IN EASTERN MONGOLIA AND FORMATION MECHANISM OF THE RELIEF ABOVE

B. Buyantogtokh; E. Kh. Turutanov; I. V. Buddo

doi:10.5800/GT-2026-17-3-0892

GRAVITY DATA-BASED MORPHOLOGY OF GRANITE MASSIFS IN EASTERN MONGOLIA AND FORMATION MECHANISM OF THE RELIEF ABOVE

B. Buyantogtokh, E. Kh. Turutanov, I. V. Buddo

https://doi.org/10.5800/GT-2026-17-3-0892

EDN: EGUSMR

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Abstract

The areal gravity survey conducted in Eastern Mongolia to investigate morphology and deep structure of the model Mesozoic granite massifs served as the basis for the field measurements using high-precision Scintrex Autograv CG-5 gravimeters in strict accordance with accepted methods for regional gravity surveys. The elevations of gravity stations were determined using Trimble 5700 GPS instrument, thus ensuring high accuracy of the vertical positioning and minimizing the errors in gravity anomaly calculations. The accuracy of the derived Bouguer gravity anomalies, together with the density of the observation network, fully meet the technical requirements for 1:100000 surveys, which ensures data reliability and validity. A detailed Bouguer anomaly map was prepared based on the processed data. Gravity field inversion enabled three-dimensional modeling of the granite massifs. Based on the derived geometry and dimensions of the bodies, as well as considerations of isostatic uplift, it is inferred that the development of positive relief landforms is associated with the upward displacement of granite bodies along the faults whose existence and activity in Eastern Mongolia have been theoretically and experimentally proved.

Keywords

gravity, gravimetry, granite massif, topographic relief, Eastern Mongolia

About the Authors

B. Buyantogtokh

Institute of Astronomy and Geophysics, Mongolian Academy of Sciences
Mongolia

Ulaanbaatar 13343

Competing Interests:

The authors declare that they have no conflicts of interest relevant to this manuscript.

E. Kh. Turutanov

Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences
Russian Federation

128 Lermontov St, Irkutsk 664033

Competing Interests:

The authors declare that they have no conflicts of interest relevant to this manuscript.

I. V. Buddo

Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Sciences ; Siberian School of Geosciences, Irkutsk National Research Technical University
Russian Federation

128 Lermontov St, Irkutsk 664033

83 Lermontov St, Irkutsk 664074

Competing Interests:

The authors declare that they have no conflicts of interest relevant to this manuscript.

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Buyantogtokh B., Turutanov E.Kh., Buddo I.V. GRAVITY DATA-BASED MORPHOLOGY OF GRANITE MASSIFS IN EASTERN MONGOLIA AND FORMATION MECHANISM OF THE RELIEF ABOVE. Geodynamics & Tectonophysics. 2026;17(3):892. (In Russ.) https://doi.org/10.5800/GT-2026-17-3-0892. EDN: EGUSMR

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