E.Yu. Baraboshkin, A.Yu. Guzhikov, A.B. Kuznetsov, E.S. Platonov, M.V. Smirnov, A.G. Fedyaevskiy, A.A. Fedorova, A.S. Shtun, O.V. Shurekova
Results of bio- and lithostratigraphic studies of carbonate Upper Jurassic-Lower Cretaceous productive deposits of the Prikumsko-Central-Caspian system of troughs and uplifts (Northern Caspian)
DOI 10.47148/0016-7894-2025-2-73-90
Key words: stratigraphy; Caspian Sea; micropaleontology; macropaleontology; palynology; paleomagnetism; petromagnetism; sedimentology; stable isotopes; sequence analysis; correlation; Jurassic; Cretaceous.
For citation: Baraboshkin E.Yu., Guzhikov A.Yu., Kuznetsov A.B., Platonov E.S., Smirnov M.V., Fedyaevskii A.G., Fedorova A.A., Shtun’ A.S., Shurekova O.V. Results of bio- and lithostratigraphic studies of carbonate Upper Jurassic-Lower Cretaceous productive deposits of the Prikumsko-Central-Caspian system of troughs and uplifts (Northern Caspian). Geologiya nefti i gaza. 2025;(2):73–90. DOI: 10.47148/0016-7894-2025-2-73-90. In Russ.
A comprehensive study of the core of wells drilled in the water area of the Northern and Central Caspian Sea was carried out. Detailed data on the structure of the section, macro- and microfacies, and sedimentation conditions of deposits were obtained. The integrated of stratigraphic works included micro-, macrofaunal and palynological studies, obtaining information on the paleo- and petromagnetic structure of the section, as well as on changes in the ratios of stable isotopes 87Sr/86Sr, δ13C, δ18O. In addition, based on sedimentological materials, a sequential analysis of the section was carried out. As a result of data generalization, the age of the deposits was established; a section-by-section correlation of the studied boreholes was carried out. The sequence includes the Lower Tithonian substage (or its Boreal analogue – the lower and lower part of the Middle Volgian regional Substages), the Upper Tithonian Substage (or its Boreal analogue – the upper part of the Middle Volgian and the lower part of the Upper Volgian regional Substages), the Berriasian stage (or its boreal analogues – the upper part of the Upper Volgian regional Substage and the Ryazan regional Stage). The upper part of the carbonate section is strongly altered and therefore its age is not reliably substantiated. The Kimmeridgian age of the deposits at the base of the section is confirmed, but the exact position of the Tithonian and Kimmeridgian boundary has not been established due to the absence of a core.
Evgeny Yu. Baraboshkin ORCiD Scopus
Doctor of Geological and Mineralogical Sciences,
Professor
Lomonosov Moscow State University
Leninskie Gory 1, Moscow, 119991, Russia
e-mail: EJBaraboshkin@mail.ru
IstinaResearcherID (IRID): 390182
SPIN-код: 1851-5457
AuthorID: 10806
Andrey Yu. Guzhikov ORCiD Scopus
Doctor of Geological and Mineralogical Sciences,
Professor
Saratov Chernyshevsky
State University,
bld. 83, 1, ul. Astrakhanskaya, Saratov, 410012, Russia
e-mail: aguzhikov@yandex.ru
IstinaResearcherID (IRID): 20217314
SPIN-код: 1705-3881
AuthorID: 61096
Anton B. Kuznetsov
Doctor of Geological and Mineralogical Sciences,
Corresponding Member of the RAS, director
Federal State Budgetary Scientific Institution Institute of
Precambrian Geology and Geochronology
of the Russian Academy of Sciences
2, nab. Makarova, Saint Petersburg, 199034, Russia
e-mail: adm@ipgg.ru
SPIN-код: 9281-6015
AuthorID: 67642
Egor S. Platonov ORCiD
Researcher
St. Petersburg branch of the
All-Russian research geological oil institute,
bld. 2, 11, ul. Smolyanaya, St. Petersburg, 192019, Russia
e-mail: Platonov@vnigni.ru
SPIN-код 2442-1509
AuthorID: 1275918
Mikhail V. Smirnov
Head of Department
LUKOIL Engineering LLC,
96, prospekt V. I. Lenina, Volgograd, 400078, Russia
e-mail: Mikhail.Smirnov@lukoil.com
Andrei G. Fedyaevskiy ORCiD Scopus
Chief specialist
Laboratory of Palynology and Stratigraphy “PalyStrat”,
19, ul. Kartashikhina, St. Petersburg, 199406, Russia
e-mail: PalyStrat@yandex.ru
Web of Science ResearcherID: IQU-1631-2023,
SPIN-код: 5583-0045,
AuthorID: 1100560
Anna A. Fedorova ORCiD
Candidate of Geological and Mineralogical Sciences,
Leading researcher
St. Petersburg branch
of the All-Russian research geological oil institute,
bld. 2, 11, ul. Smolyanaya, St. Petersburg, 192019, Russia
e-mail: fedorova@vnigni.ru
SPIN-код: 4267-8906,
AuthorID: 1281145
Artem S. Shtun’
Leading geologist
LUKOIL-Nizhnevolzhskneft LLC
1, ul. Admiralteyskaya, Astrakhan, 414024, Russia
e-mail: Artem.Shtun@lukoil.com
Ol’ga V. Shurekova ORCiD Scopus
Lead Engineer
Russian Geological
Research Institute,
74, Sredny pr., St. Petersburg, 199106, Russia
e-mail: Olga_Shurekova@karpinskyinstitute.ru
SPIN-код: 8582-2470
Web of Science ResearcherID: MFH-8558-2025
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