К.О. Sobornov
Wedge-shaped thrusts of the southern flank of the Terek-Caspian foredeep: structure, development and petroleum prospectivity
DOI 10.31087/0016-7894-2019-6-19-30

The southern flank of the Terek-Caspian foredeep is the oldest oil and gas producing region of Russia. The area is relatively well studied and regarded to as highly mature with declining production of oil and gas. Revision of modern geological and geophysical database provided important new insight into structure of the fold belt. Of special interest is the documentation of the wide occurrence of wedge-shaped thrust zones delaminating the sedimentary cover of the foredeep along the Maykop (Oligocene-Lower Miocene) shale. The allochthonous assemblage is interpreted to include some large untested duplex structures, which do not have direct manifestation in the near surface strata. They are primarily developed in front of the Dagestan promontory. Additional exploration opportunities are related to intra- and sub-salt deposits in the Terek-Sunzha fold zone.

Key words: Terek-Сaspain foredeep; Greater Caucasus; fold and thrust zones; wedge-shaped thrusts; salts; delamination of sedimentary cover; oil and gas fields; new prospects.

For citation: Sobornov K.O. Wedge-shaped thrusts of the southern flank of the Terek-Caspian foredeep: structure, development and petroleum prospectivity. Geologiya nefti i gaza. 2019;(6):19–30. DOI: 10.31087/0016-7894-2019-6-19-30.


1. Geology and oil and gas occurrence in the south of USSR [Geologiya i neftegazonosnost' Yuga SSSR. Dagestan]. In: I.O. Brod eds. Leningrad: Gostoptekhizdat; 1959. 431 p.
2. Brod I.O. Tectonics and petroleum potential of Eastern North Caucasus [Tektonika i neftegazonosnost' Vostochnogo Predkavkaz'ya]. Sovetskaya geologiya. 1938;(7):3–23.
3. Vassoevich N.B. Oil generation in terrigenous deposits (by the example of Chokraksky-Karagansky layers of the Tersky Foredeep) [Obrazovanie nefti v terrigennykh otlozheniyakh (na primere chokraksko-karaganskikh sloev Terskogo peredovogo progiba)]. Voprosy obrazovaniya nefti. Tr. VNIGRI. N. 128. Leningrad: Gostoptekhizdat; 1958. pp. 9–220.
4. Koronovskii N.V., Demina L.I. Collision stage of the development of Alpine Fold Belt, Caucasus sector [Kollizionnyi etap razvitiya Kavkazskogo sektora Al'piiskogo skladchatogo poyasa]. Geotektonika. 1999;(2):17–35.
5. Kerimov I.A., Daukaev A.A., Bachaeva T.H. Resource base of raw UV material and prospect for the oil and gas-bearing capacity of Eastern Ciscaucasia. Geologiya i Geofizika Yuga Rossii. 2014;(2):30–41.
6. Shein V.S. Geology and petroleum potential of Russia [Geologiya i neftegazonosnost' Rossii]. Moscow: Izd-vo VNIGNI; 2012. 848 p.

7. Philip H., Cisternas A., Gvishiani A., Gorshkov A. The Caucasus: an actual example of the initial stage of continental collision. Tectonophysics. 1989;161(1–2):1–21. DOI: 10.1016/0040-1951(89)90297-7.
8. Gadzhieva Z.Kh. History of the North Caucasus topography evolution [Istoriya razvitiya rel'efa Severnogo Kavkaza]. Makhachkala: RGPU im. A.I. Gertsena; 2014. 42 p.
9. Mosar J., Kangarli T., Bochud M., Glasmacher U.A., Rast A., Brunet M.-F., Sosson M. Cenozoic-Recent tectonics and uplift in the Greater Caucasus: A perspective from Azerbaijan. Geological Society of London. 2010;Special Publications(340):261–280. DOI: 10.1144/SP340.12.
10. Sokolov B.A., Korchagina Yu.I., Mirzoev D.A., Sergeeva V.N., Sobornov K.O., Fadeeva N.P. Oil and gas generation in Eastern North Caucasus [Neftegazoobrazovanie i neftegazonakoplenie v Vostochnom Predkavkaz'e]. Moscow: Nauka; 1990. 206 p.

11. Mirzoev D.A., Sharafutdinov F.G. Geology of oil and gas fields in Dagestan [Geologiya mestorozhdenii nefti i gaza Dagestana]. Makhachkala: Dagestanskoe knizhnoe izd‑vo; 1986. 312 p.
12. Sobornov K.O. Structural segmentation of East Caucasian thrust belts [Strukturnaya segmentatsiya Vostochno‑Kavkazskogo poyasa nadvigov]. Geotektonika. 1996;(5):76–88.
13. Dotduev S.I. Structure and origin of the Shatsky nappe in the Dagestan foothills [Stroenie i proiskhozhdenie paketa pokrovov Shatskogo v predgor'yakh Dagestana]. Geotektonika. 1990;(3):59–69.
14. Sobornov K.O. New oil and gas exploration target in Dagestan foothills: subthrust zones of oil and gas accumulation [Podnadvigovye zony neftegazonakopleniya — novyi ob"ekt poiskov nefti i gaza v Predgornom Dagestane]. Geologiya nefti i gaza. 1988;(2):8–12.
15. Jones P.B. Oil and gas beneath east‑dipping underthrust faults in the Alberta Foothills. In: Geological studies of the Cordilleran Thrust Belt. V. 1. R.B. Powers, ed. Denver: Rocky Mountain Association of Geologists; 1982. pp. 61–74.
16. Groshev V.G., El'manovich S.S., Larin V.N. Model of compressional folds formation in Terek‑Caspian foredeep in the context of assessment of subsalt formations petroleum prospects [Model' formirovaniya skladok szhatiya v Tersko‑Kaspiiskom peredovom progibe v svyazi s otsenkoi perspektiv neftegazonosnosti podsolevykh otlozhenii] In: Geoevraziya‑2018: tr. mezhdunar. geol.‑geofiz. konf. (Moscow, 2018). 2018. pp. 81–85. Available at: https://yadi.sk/d/tshM‑h5P3TsgbN (Accessed 10.06.2019).

17. Kosarev V.S. Oil potential of the Upper Jurassic series in the western part of Terek‑Caspian foredeep [Perspektivy neftenosnosti verkhneyurskikh otlozhenii zapadnoi chasti Tersko‑Kaspiiskogo progiba]. Geologiya nefti i gaza. 1982;(2).

К.О. Sobornov   Scopus

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