Home > Archive > No. 2 (202) 2026 > 46–61
Geology & Geochemistry of Combustible Minerals No. 2 (202) 2026, 46–61
ISSN 0869-0774 (Print), ISSN 2786-8621 (Online)
https://doi.org/
Natalia ZHABINA1, Olena ANIKEYEVA2
1 Institute of Geological Sciences of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
e-mail: zhabinanatalia@gmail.com, https://orcid.org/0000-0003-2759-2010
2 Institute of Geology and Geochemistry of Combustible Minerals of the National Academy of Sciences of Ukraine, Lviv, Ukraine
e-mail: geolena@ukr.net, https://orcid.org/0000-0001-8177-4304
Abstract
In the western part of Upper Jurassic – Lower Cretaceous carbonate complex of Ukrainian Precarpathians, are the depression sediments, represented by open shelf deposits and reef destruction products. They were opened by wells in area adjacent to the Krakovets fault, their recorded length reaches 100 km. Numerous oil-shows and small deposits are known in the upper part.
Since the depressional formations of the Upper Jurassic are promising for hydrocarbons, detailed comprehensive studies are a necessary prerequisite for the effectiveness of further geological work. A detailed characteristic of these sediments is also necessary for regional and interregional correlation.
Based on the analysis and comparison of a complex of published data and the results of our microfaunal and microfacies studies, the structure and composition of depression formations of the Upper Jurassic – Lower Cretaceous carbonate complex in Ukrainian Precarpathians have been clarified. They consist of the forereef facies of Oxfordian (Boniv suite), Kimmerigian (Morantsy suite), Tithonian – Lower Berriasian (Lower subsuite of Carolina suite) and the open-marine formations of Upper Berriasian – Early Valanginian. (Upper subsuite of Carolina suite). These deposits extend in a narrow strip along the Krakovets fault and with regional erosion are covered by Neogene sediments. The full section of depression sediments has been opened by five wells. A detailed lithological and paleontological characteristic of these sediments at the macro- and microscopic levels is provided, zoning by foraminifera and tintinnids is characterized, correlative microfacies with planktonic microorganisms are determined.
The occurrence of depression deposits is prognosed under the thrust structures of the Carpathians. It expands the prospects of oil and gas potential of the region and needs further comprehensive research by various geological and geophysical methods.
Keywords
Upper Jurassic – Lower Cretaceous, depression deposits, lithological and paleontological composition, sedimentation conditions, Ukrainian Precarpathians
Referenses
Anikeyeva, O. V., & Zhabina, N. M. (2002). Facies of Late Jurassic source rocks: Ukrainian Carpathian Foredeep. In Nowe metody i technologie w geologii naftowej, wiertnictwie, eksploatacji otworowej i gazownictwie: XIII Międzynarodowa konferencja naukowo-techniczna (Kraków, 20–21 czerwca 2002 r.). Kraków.
Dulub, V. H. (1995). Stratyfikatsiia depresiinykh utvoren verkhnoi yury Bilche-Volytskoi zony Peredkarpatskoho prohynu [Stratification of depression formations of the Upper Jurassic of the Bilche-Volytsky zone of the Carpathian foredeep]. In Nafta i haz Ukrainy [Oil and gas of Ukraine]: materialy naukovo-praktychnoi konferentsii (Kyiv, 17–19 travnia 1994 r.) (Vol. 1, pp. 118). Lviv: UNHA. [in Ukrainian]
Dulub, V. G., Burova, M. I., Burov, V. S., & Vishniakov, I. B. (1986). Obiasnitelnaia zapiska k regionalnoi stratigraficheskoi skheme iurskikh otlozhenii Predkarpatskogo progiba i Volyno-Podolskoi okrainy Vostochno-Evropeiskoi platformy [Explanatory note to the regional stratigraphic scheme of the Jurassic deposits of the Precarpathian trough and the Volyno-Podolsk margin of the East European platform]. Leningrad: Mingeo USSR. [in Russian]
Dulub, V. G., & Zhabina, N. M. (1999). Stratigraphic and sedimentary aspects of the Upper Jurassic carbonate-evaporite deposits in the Ukrainian Carpathian foredeep. Biuletyn Państwowego Instytutu Geologicznego, 387, 25–26.
Dulub, V. G., & Zhabina, N. M. (2001). Upper Jurassic deposits in the Ukrainian Precarpathian area. In Carpathians palaeogeography and geodynamics: a multidisciplinary approach: 12th meeting of the Association of European Geological Societies MAEGS 2001 (Krakow, Poland, 8–15 September, 2001): abstracts (p. 41). Krakow.
Dulub, V. H., Zhabina, N. M., Ohorodnik, M. Ye., Smirnov, S. Ye. (2003). Poiasniuvalna zapyska do stratyhrafichnoi skhemy yurskykh vidkladiv Peredkarpattia (Stryiskyi yurskyi basein) [Explanatory note to the stratigraphic scheme of the Jurassic sediments of Precarpathians (Striy Jurassic Basin)]. Lviv: LV UkrDHRI. [in Ukrainian]
Hubych, I., Syrota, T., Donets, H., & Barchuk, V. (2001). Do pytannia pokhodzhennia nafty u yurskykh vidkladakh Kosivsko-Uherskoi pidzony (Bilche-Volytska zona) [On the question of the origin of oil in the Jurassic deposits of the Kosiv-Uhersko subzone (Bilche-Volytsa zone)]. In Heolohiia horiuchykh kopalyn Ukrainy [Geology of fossil fuels of Ukraine]: tezy dopovidei Mizhnarodnoi naukovoi konferentsii (pp. 77–78). Lviv. [in Ukrainian]
Karpenchuk, Yu. R., Zhabina, N. M., & Anikeieva, O. V. (2006). Osoblyvosti budovy i perspektyvy naftohazonosnosti verkhnoiurskykh ryfohennykh kompleksiv Bilche-Volytskoi (Zovnishnoi) zony Peredkarpatskoho prohynu [Structural features and prospects of oil and gas bearing of the Upper Jurassic reef complexes of the Bilche-Volytsa (Outer) zone of the Carpathian Foredeep]. Heolohiia i heokhimiia horiuchykh kopalyn, 2, 44–52. [in Ukrainian]
Krupskyi, Yu. Z. (2020). Heolohiia i naftohazonosnist Zakhidnoho rehionu Ukrainy [Geology and oil and gas potential of the Western region of Ukraine]. Lviv: SPOLOM. [in Ukrainian]
Misik, M., & Rehakova, D. (2009). Vapence Slovenska. I cast. Biohermne, krinoidove, sladkovodne, ooidove a onkoidove vapence. Bratislava: VEDA.
Rehakova, D. (2019). Plankton evolution and biostratigraphy during Late Jurassic and Early Cretaceous. In I. Broska, M. Kohút & A. Tomašových (Eds.), Proceedings of the Geologica Carpathica 70 Conference (Smolenice Castle, Slovakia, October 9–11, 2019) (pp. 137–140). Bratislava
Rehakova, D., Matyja, A., Wierzbowski, A., Schlogl, J., Krobicki, M., & Barski, M. (2011). Stratigraphy and microfacies of the Jurassic and lowermost Cretaceous of the Veliky Kamenets section (Pieniny Klippen Belt, Carpathians, Western Ukraine). Volumna Jurassica, 9(1), 61–104.
Samarska, O. V., Zhabina, N. M., & Smirnov, S. Ye. (1995). Sedymentatsiina model karbonatnoi yury Bilche-Volytskoi zony Peredkarpatskoho prohynu [Sedimentation model of the carbonate Jurassic of the Bilche-Volytsky zone of the Precarpathian trough]. In Nafta i haz Ukrainy [Oil and gas of Ukraine]: materialy naukovo-praktychnoi konferentsii (17–19 travnia 1994 r.) (Vol. 1, pp. 63–64). Lviv: UNHA. [in Ukrainian]
Zhabina, N. M. (2011). Biostratyhrafiia vidkladiv verkhnoi yury – nyzhnoi kreidy (oksford–valanzhyn) Ukrainskoho Peredkarpattia za foraminiferamy i tyntynidamy [Biostratigraphy of the Upper Jurassic–Lower Cretaceous (Oxfordian-Valanginian) in Ukrainian Precarpathian by the foraminifera and tintinnida] [Doctorʼs thesis]. Institute of Geological Sciences of NAS of Ukraine. Kyiv. [in Ukrainian]
Zhabina, N. (2024). Koreliatsiia skhidnoho sehmentu Tetychnoho ryfovoho barieru verkhnoi yury ta prylehlykh fatsii (Karpato-Krymsko-Kavkazka oblast) [Correlation of the eastern segment of Tethyan Upper Jurassic reef barrier and adjacent facies (Carpathian-Crimean-Caucasian area)]. Heolohiia i heokhimiia horiuchykh kopalyn, 1–2(193–194), 95–112. https://doi.org/10.15407/ggcm2024.193-194.095 [in Ukrainian]
Zhabina, N. M., & Anikeieva, O. V. (2007). Onovlena stratyhrafichna skhema verkhnoi yury – neokomu Ukrainskoho Peredkarpattia [Updated stratigraphic scheme of the Upper Jurassic–Neocomian of Ukrainian Precarpathians]. Zbirnyk naukovykh prats UkrDHRI, 3, 46–56. [in Ukrainian]
Zhabina, N. M., Shlapinsky, V. Y., Prykhodko, M. G., Anikeyeva, O. V., & Machalsky, D. V. (2017). The generalizated stratigraphic scheme of the Jurassic of Western Ukraine. Heolohichnyi zhurnal, 4(361), 9–22. https://doi.org/10.30836/igs.1025-6814.2017.4.121165
Received: April 18, 2026
Accepted: April 28, 2026
Published: May, 2026