Geology & Geochemistry of Combustible Minerals No. 1–2 (187–188) 2022, 71–81.
Kostyantyn HRYGORCHUK1, Volodymyr HNIDETS2, Lina BALANDYUKInstitute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: firstname.lastname@example.org; email@example.com
According to the results of lithological studies of the Paleocene sediments of the southern side of the Karkinite Depression, the lateral lithological-lithmological and facial variability of the sediments is characterized, which is manifested both in the whole section of the Paleocene and its individual epochs. It is shown that the role of limestone formations clearly decreases from the beginning to the end of the period with their maximum development in Zealand time. Sediments of the Tanetian epoch are characterized by dominance in the section of marl-clay formations and the development of siltstone-sand bodies in the area of the Odesa structure. Sediments are represented by three types of section: terrigenous (well Odeska-2), carbonate (wells Hamburtseva-2, Selskogo-40), carbonate-clay (wells Crimean-1, Shtormova-5, Centralna-1, Arkhangelskogo-1). In different areas, each type of section is characterized by a certain specificity of the internal structure. Lithological heterogeneity of sediments is associated with spatial and age variability of biofacial zones: biogerms, inland biogerm lagoons, plumes of destruction of bioherms, the outer shelf. In the sediments of the Danian age, small limestone bodies are localized in the Shtormova and Odesa structures. Zealand strata in the area from well Hamburtseva-2 to well Centralna-1 are characterized by significant development of bioherms, which are replaced in the direction of the Odesa structure by plumes of destruction and sediments of basin plains. The development of bioherm formations in the axial part of the depression is predicted, which is associated with the sedimentary manifestation of the Central Mikhailovsky uplift. This significantly expands the prospects for oil and gas in this part of the study area. During the Tanetian period, rising sea levels caused an increase in the area of distribution of the outer shelf in the axial zone of depression. At the same time, in the area of the structures of Hamburtseva, Selskogo, Centralna inheritedly (despite the transgression) were developed biohermic massifs, which was caused by upward movements within the Black Sea-Kalamitsky uplift.
lithology, facies, sedimentation conditions, Paleocene, Karkinite Depression
Fortunatova, N. K. (Ed.). (2000). Sedimentologicheskoe modelirovanie karbonatnikh osadochnikh kompleksov [Sedimentological modeling of carbonate sedimentary complexes]. Moskva: REFIA. [in Russian]
Gromin, V. I., Rogoza, O. I., Chaitskii, V. P., & Shimanskii, A. A. (1986). Klinoformi severo-zapadnogo shelfa Chernogo morya, ikh genezis i usloviya neftegazonosnosti [Clinoforms of the northwestern shelf of the Black Sea, their genesis and conditions of oil and gas potential]. Geologiya nefti i gaza, 10, 46–53. [in Russian]
Hnidets, V. P., Hryhorchuk, K. H., & Balandiuk, L. V. (2021). Osoblyvosti formuvannia nyzhnokreidovoi tektono-sedymentatsiinoi systemy Prychornomorskoho mehaprohynu [Peculiarities of formation of the Lower Cretaceous teсtono-sedimentation system of the Black Sea megadepression]. Heolohichnyi zhurnal, 2(375), 67–78. https://doi.org/10.30836/igs.1025-6814.2021.2.224399 [in Ukrainian]
Hnidets, V. P., Hryhorchuk, K. H., Kurovets, I. M., Kurovets, S. S., Prykhodko, O. A., Hrytsyk, I. I., & Balandiuk, L. V. (2013). Heolohiia verkhnoi kreidy Prychornomorsko-Krymskoi naftohazonosnoi oblasti (heolohichna paleookeanohrafiia, litohenez, porody-kolektory i rezervuary vuhlevodniv, perspektyvy naftohazonosnosti) [Geology of the Upper Cretaceous of the Black Sea-Crimean oil and gas region (geological paleoceanography, lithogenesis, reservoir rocks and hydrocarbon reservoirs, oil and gas potential)]. Lviv: Poli. [in Ukrainian]
Hozhyk, P. F. (Ed.). (2006). Stratyhrafiia mezokainozoiskykh vidkladiv pivnichno-zakhidnoho shelfu Chornoho moria [Stratigraphy of Mesocainozoic sediments of the north-western shelf of the Black Sea]. Kyiv. [in Ukrainian]
Ilin, V. D., & Fortunatova, N. K. (1988). Metodi prognozirovaniya i poiskov neftegazonosnikh rifovikh kompleksov [Methods of forecasting and searching for oil and gas reef complexes]. Moskva: Nedra. [in Russian]
Karogodin, Yu. N. (1980). Sedimentatsionnaya tsiklichnost [Sedimentation cycle]. Moskva: Nedra. [in Russian]
Kozlenko, M. V., Kozlenko, Yu. V., & Lisinchuk, D. V. (2013). Struktura zemnoi kori severo-zapadnogo shelfa Chernogo morya vdol profilya GSZ No. 26 [The structure of the earth’s crust in the N-W of the Black Sea shelf along the DSS profile No. 26]. Heofizychnyi zhurnal, 35(1), 142–152. https://doi.org/10.24028/gzh.0203-3100.v35i1.2013.116345 [in Russian]
Rever, V. B. (2016). Litohenez eotsenovykh vidkladiv Chornomorskoho sehmentu okeanu Tetis [Lithogenesis of Eocene sediments of the Black Sea segment of the Tethys Ocean]. Kyiv: Naukova dumka. [in Ukrainian]
Vail, P. R., Mitchum Jr., R. M., & Thompson III, S. (1977). Seismic stratigraphy and global changes of sea level: Part 4. Global cycles of relative changes of sea level. AAPG, Memoir, 26, 83–97. https://doi.org/10.1306/M26490C6