Structure of the gravitational field and gravity-disturbing objects of the South Torgay sedimentary basin
/ 0
- Details
- Parent Category: 2025
- Category: Content №2 2025
- Created on 26 April 2025
- Last Updated on 28 April 2025
- Published on 28 April 2025
- Written by A. E. Abetov, D. B. Mukanov
- Hits: 875
Authors:
A.E.Abetov, orcid.org/0000-0002-1866-7677, Satbayev University, Almaty, the Republic of Kazakhstan
D.B.Mukanov*, orcid.org/0000-0002-9628-2588, Satbayev University, Almaty, the Republic of Kazakhstan, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (2): 013 - 025
https://doi.org/10.33271/nvngu/2025-2/013
Abstract:
Purpose. Study of the distribution of density heterogeneities at various slices of the Earth’s crust in the South Turgay sedimentary basin (STSB). Identification of the correlation relationships of these heterogeneities with the structure, geodynamic processes, and tectonic evolution of this basin.
Methodology. Geological interpretation of regional, intracrustal, and local gravity field anomalies, incorporating data from seismic and magnetic surveys, geothermal studies, and neotectonic dislocations.
Findings. The spatial distribution of density heterogeneities at different lithospheric slices of the STSB has been identified, along with the locations of gravity-disturbing mass centers, as well as the extent, shape, and intensity of anomalous bodies and their burial depths. In the depth range of 30–150 km, a pronounced block heterogeneity of the STSB's lithosphere is observed, revealing significant differences in the intensity, morphology, polarity, orientation, and gradient variations of the transformed gravity anomaly (greg) compared to the adjacent areas of the Lower Syrdarya Horst and the Shu-Sarysu Depression. At depths of up to 25–30 km in the consolidated crust, manifestations of horizontal shear deformations have been established, along with the internal structure and contrast of intra-crustal interblock boundaries. No significant differences between the STSB and the Lower Syrdarya Horst have been identified in the intra-crustal gravity transform field, while distinctions from the Shu-Sarysu Depression have been observed. At depths of up to 7 km, local gravity-disturbing objects show a clear correlation with the depth to the top of Paleozoic formations, effectively tracing fold belts concealed beneath Mesozoic-Cenozoic deposits
Originality. For the first time, assumptions have been made for the region about significant differentiation in the depths and ages of major faults, which indicates amplitudes of shifts at the level of regional, intracrustal and local heterogeneities of the lithosphere. At the base of the earth’s crust of the STSB along the Moho discontinuity, a trough is recorded, under which an active mantle zone is observed, increased horizontal gradients of the base of the earth’s crust are fixed. A unique geological phenomenon has been revealed, according to which the main geonomic boundaries of the earth’s crust are conformable, which clearly confirms the rift nature of the STSB.
Practical value. The obtained data can be utilized for developing new approaches to geological exploration, its planning and assessing the oil and gas potential of the STSB; as well as to optimize the location of exploration and appraisal wells and design wells targeting new oil and gas prospective formations within the complexes of the quasi-platform structural level. The research results will contribute to a better understanding of the distribution patterns of deep-seated density, structural, geomagnetic, and geothermal heterogeneities at various levels of the lithosphere, their correlation with modern tectonics and the geological evolution history of the STSB. Moreover, they can serve as a foundation for future scientific research aimed at studying geodynamic processes in this basin as well as for adapting the proposed methodology to other oil and gas basins.
Keywords: gravitational field, transformants, heterogeneities of the lithosphere, seismic surveys, magnetic surveys, geothermal studies, neotectonic dislocations
References.
1. Daukeev, S. J., Uzhkenov, B. S., Abdulin, A. A., Bespaev, H. A., Votsalevsky, E. S., Lyubetsky, V. N., Mazurov, A. K., & Miroshnichenko, L. A. (2002). Depth structure and geodynamics (Vol. 1). Oil and Gas, (3). In Depth structure and mineral resources of Kazakhstan. Almaty.
2. Paragulgov, T. H., Paragulgov, H. H., Fazylov, E. M., & Musina, E. S. (2013). South-Torgai sedimentary basin - material composition and oil and gas content of pre-Mesozoic formations. News of the National Academy of sciences of the Republic of Kazakhstan. Series Geology and technical sciences, (1), 44-54.
3. Cook, H. E., Zhemchuzhnikov, V. G., Buvtyshkin, V. M., Golub, L. Y., Gatovsky, Y. A., & Zorin, A. Ye. (1995). Devonian and Carboniferous passive-margin carbonate platform of southern Kazakhstan: summary of depositional and stratigraphic models to assist in the exploration and production of coeval giant carbonate platform oil and gas fields in the North Caspian Basin, western Kazakhstan. In Embry, A. F., Beauchamp, B., & Glass, D. J. (Eds.) Pangea: Global Environments and Resources. Canadian Society of Petroleum Geologists, Memoirs, 17, 363-381. https:// doi.org/10.2110/pec.02.74.0081
4. Abetov, A. E., & Mukanov, D. B. (2023). Structure and interpretation of the anomalous magnetic field of the South Turgay Petroleum region. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (5), 5-12. https:// doi.org/10.33271/nvngu/2023-5/005
5. Zholtaev, G. Zh., & Paragulgov, T. H. (1998). Geology of oil and gas bearing areas of Kazakhstan (Geology and oil and gas content of South Torgai depression). Almaty: IIA “Aikos”.
6. Nusipov, E. N., Shatsilov, V. I., & Uzbekov, N. B. (2007). Geodynamics and seismicity of lithosphere of Kazakhstan. Almaty.
7. Shatsilov, V. I., & Gorbunov, P. N. (1996). Structure of the crustal basement of Kazakhstan and adjacent territories. England Earthquake, 10(1), 86-92.
8. Alexeiev, D. V., Bykadorov, V. A., Volozh, Y. A., & Sapozhnikov, R. B. (2017). Kinematic analysis of Jurassic grabens of soulthern Turgai and the role of the Mesozoic stage in the evolution of the Karatau–Talas–Ferghana strike-slip fault, Southern Kazakhstan and Tian Shan. Geotecton, 51, 105-120. https://doi.org/10.1134/S0016852117020029
9. Rolland, Y., Alexeiev, D.V., Kroner, A., Corsini, M., Loury, Ch., & Monie, P. (2013). Late Palaeozoic to Mesozoic kinematic history of the Talas-Ferghana strike-slip fault (Kyrgyz West Tianshan) as revealed by 40Ar/39Ar dating of syn-kinematic white mica. Journal of Asian Earth Sciences, 67-68, 76-92.
10. Burtman, V. S. (1980). Faults of Central Asia. American Journal of Science, 280, 725-744. https://doi.org/10.2475/ajs.280.8.725
11. Uzhkenov, B. S., Akylbekov, S. A., & Mazurov, A. K. (2002). Map of anomalous magnetic field (Ta) of Kazakhstan. Scale 1:1000000. Explanatory note. Almaty.
12. Shabalina, L. V., Fazylov, E. M., & Musina, E. S. (2010). PrikhodkoDepth structure of the Earth’s crust and upper mantle. News of the NAS RK. Series geological, (3), 128-133.
13. Kirscher, U., Zwing, A., Alexeiev, D. V., Echtler, H. P., & Bachtadse, V. (2013). Paleomagnetism of Paleozoic sedimentary rocks from the Karatau Range, Southern Kazakhstan: Multiple remagnetization events correlate with phases of deformation. Journal of geophysical research: solid earth, 118, 3871-3885. https://doi.org/10.1002/jgrb.50253, 2013
14. Shatsilov, V. I., Gorbunov, P. N., & Stepanenko, N. P. (1993). Velocity Models of the Earth Crust of Kazakhstan. Almaty: EURASIA.
15. Shatsilov, V. I., Timush, A. V., Stepanenko, N. P., Kaidash, T. M., & Belousova, N. P. (2005). Features of the structure of the lithosphere of the Tien Shan and adjacent platforms. Geodynamic, seismological and geophysical bases of earthquake prediction and seismic risk assessment, 2005, 118-129.
16. Nusipov, E., Nemchenkov, V. P., Taradaeva, T. V., & Timush, A. V. (2007). Geodynamics and seismicity of lithosphere of Kazakhstan. Almaty.
17. Abetov, A. E., & Mukanov, D. B. (2023) History of the geological evolution of the South Torgay basin in the Pre–Cretaceous. News of the National Academy of sciences of the Republic of Kazakhstan. Series Geology and technical sciences, 4(460), 248-254. https://doi.org/10.32014/2019.2518-170X.30
18. Shatsilov, V. I., Gorbunov, P. N., & Fremd, A. G. (1993). Velocity Models of the Earth Crust of Kazakhstan. Almaty: Eurasia.
19. Daukeev, GS. J., Uzhkenov, B. S., Abdulin, A. A., Bespaev, H. A., Votsalevsky, E. S., Lyubetsky, V. N., …, & Shabalina, L. V. (2002). Deep structure and geodynamics of Kazakhstan (Explanatory note to the Map of deep tectonic structure of Kazakhstan at a scale of 1:2 500 000) (Vol. 1). In Deep structures and mineral resources of Kazakhstan.
20. Yin, W., Fan, Z., Zheng, J., Yin, J., Zhang, M., Sheng, X., …, & Lin, Y. (2012). Characteristics of strike-slip inversion structures of the Karatau fault and their petroleum geological significances in the South Turgay Basin, Kazakhstan. Petroleum Science, 9, 444-454. https://doi.org/10.1007/s12182-012-0228-3
21. Jin-hai, L., Xin-Yuan, Z., Bin, Q., Zhilin, Y., Hong, Y., & Jianxin, L. (2004). Controls of Talas-Ferghana Fault on Kashi Sag, Northwestern Tarim Basin[J]. Xinjiang Petroleum Geology, 25(6), 689-692.
22. Aubekerov, B. Zh., Tsirelson, B. S., Bykadorov, V. A., & Popov, V. A. (2010). Features of the Geological Structure and Prospects for Hydrocarbon Potential of the Mesozoic-Cenozoic Sedimentary Basins of Southern Kazakhstan.
23. Abetov, A. E., & Uzbekov, A. N. (2023) Tectonics and gravity field structure of Central Kazakhstan. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (4), 18-26. https://doi.org/10.33271/nvngu/2023-4/018
24. Akishev, T. A., & Schneider, I. Yu. (1990). Gravimetric Map of the Kazakh SSR and Adjacent Territories of the Union Republics, Scale 1:1,500,000.
Newer news items:
- Determination of the causes of rolling surface damage during operation of the railway wheels - 26/04/2025 20:53
- Testing of fine classification sifter in the processing and disposal of mining waste - 26/04/2025 20:53
- Determination of the harmonic distortion value of vibroacoustic signals in the process of drilling operations - 26/04/2025 20:53
- Investigation of the stress-strain state of mine shaft support under long-term operation - 26/04/2025 20:53
- Features of technological factors of well construction based on the example of oil and gas fields - 26/04/2025 20:53
- Providing stability of quarry slopes at combined mining of mineral deposits - 26/04/2025 20:53
- Determining the limiting contour of the quarry based on minimizing the volume of the near-contour ore zone - 26/04/2025 20:53
- Model representation of the influence of hydraulic mixture backwater in the washout chamber on the hydraulic elevator lifting height - 26/04/2025 20:53
- Modern geoelectric surveys along the Mali Heivtsi ‒ Tiachiv profile of the Transcarpathian Trough - 26/04/2025 20:53
- Origin of the over consumption of cyanide during the leaching of the Amesmessa gold ore - 26/04/2025 20:53
