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BIOSTRATIGRAPHY OF PALEOCENE-EOCENE DEPOSITS OF THE UKRAINIAN CARPATHIANS BASED ON PLANKTONIC FORAMINIFERA

Home > Archive > No. 3–4 (185–186) 2021 > 56–64


Geology & Geochemistry of Combustible Minerals No. 3–4 (185–186) 2021, 56–64.

https://doi.org/

Svitlana HNYLKO

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: igggk@mail.lviv.ua

Abstract

Paleogene deposits are the main reservoir of hydrocarbon resources in the Carpathians and creation of the modern stratigraphic scheme of these deposits is the basis for improving the efficiency of geological search works. The reliable stratification is a necessary precondition for the preparation of geological maps. Stratification of the Paleocene–Eocene sediments is provided by foraminifera, nannoplankton, dinocysts, radiolarians, sponge spicules, palynoflora. Planktonic foraminifera is the main stratigraphic group of the Paleogene fauna.

In the predominantly non-calcareous flysch of the Paleocene–Eocene of the Carpathians, mainly agglutinated benthic foraminifera of siliceous composition are developed. Planktonic foraminifera are distributed locally – in calcareous facies. The most complete sequence of Paleocene–Eocene planktonic foraminifera is represented in the Metova Formation (the Vezhany nappe of the Inner Carpathians).

The results of own researches of natural sections of sediments distributed within the Magursky, Monastyretsky and Vezhany nappes of the Ukrainian Carpathians together with the analysis of literature sources are used.

The article presents a generalized biozonal division of the Paleocene–Eocene of the Ukrainian Carpathians by planktonic foraminifera. On the basis of certain correlation levels, a comparison with the Geological Time Scale was made.

The Parvularugoglobigerina eugubina Zone (lowermost Danian), Globoconusa daubjergensis Zone (middle Danian), Praemurica inconstans Zone (upper Danian); Morozovella angulata Zone (lower Selandian); Globanomalina pseudomenardii Zone fnd Acarinina acarinata Zone (upper Selandian–Thanetian); Morozovella subbotinae Zone (lower Ypresian), Morozovella aragonensis Zone (upper Ypresian); Acarinina bullbrooki Zone (lower Lutetian), Acarinina rotundimarginata Zone (upper Lutetian); Hantkenina alabamensis Zone (Bartonian); Globigerinatheka tropicalis Zone (lower Priabonian) and Subbotina corpulenta Zone (upper Priabonian) based on planktonic foraminifera are characterized in studied deposits.

Keywords

Ukrainian Carpathians, planktonic foraminifera, biostratigraphy, Paleocene–Eocene

Referenses

Andreeva-Grigorovich, A. S., Gruzman, A. D., Lozynyak, P. Yu., & Smirnov, S. E. (1987). Opornye razrezy pogranichnykh sloev eotsena i oligotsena Duklyanskoi i Marmaroshskoi zon. Paleontologicheskii sbornik, 24, 33–38. [in Russian]

Andreeva-Grigorovich, A. S., Vyalov, O. S., Gavura, S. P., Gruzman, A. D., Dabagyan, N. V., Danysh, V. V., Ivanik, M. M., Kul’chitskii, Ya. O., Lozynyak, P. Yu., Maslun, N. V., Petrashkevich, M. I., Ponomareva, L. D., Portnyagina, L. A., Smirnov, S. E., & Sovchik, Ya. V. (1984). Obyasnitelnaya zapiska k regionalnoi stratigraficheskoi skheme paleogenovykh otlozhenii Ukrainskikh Karpat [Preprint № 84-19]. Kiev: Institut geologicheskikh nauk AN USSR. [in Russian]

Andreyeva-Grigorovich, A. S. (1999). Biostratigraphic correlations of the paleogene deposits of the Ukrainian Carpathians and Crimea-Bakhchisarai area using nannoplankton and dinocysts. Geologica Carpathica, 50, 10–12.

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Hnylko, S. R. (2017). Foraminifery i stratyhrafiia paleotsen-eotsenovykh vidkladiv Ukrainskykh Karpat [Extended abstract of сandidateʼs thesis]. Instytut heolohichnykh nauk NAN Ukrainy. Kyiv. [in Ukrainian]

Hnylko, S. R., & Hnylko, O. M. (2013). Stratyhrafiia, biozonalnyi podil za foraminiferamy ta umovy nakopychennia paleotsen-eotsenovykh vidkladiv Vezhanskoho pokryvu Vnutrishnikh Karpat. Zbirnyk naukovykh prats Instytutu heolohichnykh nauk NAN Ukrainy, 6(1), 90–97. [in Ukrainian]

Myatlyuk, E. V. (1970). Foraminifery flishevykh otlozhenii Vostochnykh Karpat (mel–paleogen). Leningrad: Nedra. [in Russian]

Hnylko, S., & Hnylko, O. (2016). Foraminiferal stratigraphy and palaeobathymetry of Paleocene-lowermost Oligocene deposits (Vezhany and Monastyrets nappes, Ukrainian Carpathians). Geological Quarterly, 60(1), 75–103.

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Vyalov, O. S., Gavura, S. P., Danysh, V. V., Leshchukh, R. I., Ponomareva, L. D., Romaniv, A. M., Tsarnenko, P. N., & Tsizh, I. T. (1981). Istoriya geologicheskogo razvitiya Ukrainskikh Karpat. Kiev: Naukova dumka. [in Russian]

Vyalov, O. S., Gavura, S. P., Danysh, V. V., & Smirnov, S. E. (1987). Opornye pogranichnye razrezy eotsena i oligotsena severnogo sklona Ukrainskikh Karpat. Paleontologicheskii sbornik, 24, 20–27. [in Russian]

Vyalov, O. S., Gavura, S. P., & Ponomareva, L. D. (1987). Opornye razrezy pogranichnykh otlozhenii eotsena i oligotsena Vnutrennei zony Predkarpatskogo progiba. Paleontologicheskii sbornik, 24, 12–20. [in Russian]


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TECTONIC-SEDIMENTARY EVOLUTION OF THE FRONTAL PART OF THE UKRAINIAN CARPATHIAN NAPPE STRUCTURE

Home > Archive > No. 1–2 (183–184) 2021 > 45–59


Geology & Geochemistry of Combustible Minerals No. 1–2 (183–184) 2021, 45–59.

https://doi.org/10.15407/ggcm2021.01-02.045

Oleh HNYLKO, Svitlana HNYLKO, Maria KULYANDA, Romana MARCHENKO

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, e-mail: igggk@mail.lviv.ua

Abstract

For the first time in the Ukrainian Carpathians, the depths and tectono-sedimentation processes in the north-eastern part of the Outer Carpathian Basin (Skyba and Boryslav-Pokuttya units) have been restored on the base of sedimentological and microfaunistic studies. It was established that in the Cretaceous-Eocene time, the deep-water (near Calcite Compensation Depth) turbidite and similar sedimentation (turbidites with Bouma textures, grainites, debris-flow deposits), which periodically alternated with (hemi)pelagic sedimentation (red, green and black shales) was dominant here. Sedimentation took place on the continental margin of the the Carpathian branch of the Tethys, where deep-water fans were formed. Cretaceous-Eocene background red and green shales are enriched in buried in situ benthic foraminifera which are similar in taxonomic composition and morphological features to the microfauna of the Carpathian-Alpine and Atlantic regions (deep-water agglutinated foraminifera), which indicate lower bathyal – abyssal depths of flysch sedimentation. Latest Eocene Globigerina Marl horizon contains the foraminiferal assemblage with plankton dominance, which indicates a general shallowing of the Outer Carpathian Basin (middle-upper bathyal conditions above a calcite compensation depth). Oligocene – lowermost Miocene Menilite-Krosno and Polyanytsia formations were accumulated in the Skyba and Boryslav-Pokuttya sub-basins. In the Miocene, shallow-water molasses were accumulated here. Probably, the tectonic uproot of flysch deposits from its substrate and their synsedymentary thrusting towards the platform caused a significant shallowing of the Skyba and Boryslav-Pokuttya sub-basins starting from the latest Eocene. These processes reflected the growth of the Carpathian frontal nappes at the final orogen formation stage.

Keywords

Ukrainian Carpathians, Skyba and Boryslav-Pokuttya nappes, foraminifera, turbidites

Referenses

Andreeva-Grigorovich, A. S., Vyalov, O. S., Gavura, S. P., Gruzman, A. D., Dabyagyan, N. V., Danysh, V. V., Ivanik, M. M., Kul’chitskii, Ya. O., Lozynyak, P. Yu., Maslun, N. V., Petrashkevich, M. I., Ponomareva, L. D., Portnyagina, L. A., Smirnov, S. E., & Sovchik, Ya. V. (1984). Ob”yasnitel’naya zapiska k regional’noi stratigraficheskoi skheme paleogenovykh otlozhenii Ukrainskikh Karpat [Preprint № 84-19]. Kiev: Institut geologicheskikh nauk AN USSR. [in Russian]

Andreyeva-Grigorovich, A. S. (1999). Biostratigraphic correlations of the paleogene deposits of the Ukrainian Carpathians and Crimea-Bakhchisarai area using nannoplankton and dinocysts. Geologica Carpathica, 50, 10–12.

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Vyalov, O. S., Gavura, S. P., Danysh, V. V., Lemishko, O. D., Leshchukh, R. I., Ponomareva, L. D., Romaniv, A. M., Smirnov, S. E., Smolinskaya, N. I., & Tsarnenko, P. N. (1988). Stratotipy melovykh i paleogenovykh otlozhenii Ukrainskikh Karpat. Kiev: Naukova dumka. [in Russian]

Vyalov, O. S., Gavura, S. P., Danysh, V. V., Leshchukh, R. I., Ponomareva, L. D., Romaniv, A. M., Tsarnenko, P. N., & Tsizh, I. T. (1981). Istoriya geologicheskogo razvitiya Ukrainskikh Karpat. Kiev: Naukova dumka. [in Russian]

Vyalov, O. S., Gavura, S. P., Danysh, V. V., & Smirnov, S. E. (1987). Opornye pogranichnye razrezy eotsena i oligotsena severnogo sklona Ukrainskikh Karpat. Paleontologicheskii sbornik, 24, 20–27. [in Russian]


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LITHOLOGICAL-GEOCHEMICAL TYPES OF DEPOSITS OF CRETACEOUS-PALEOGENE FLYSCH OF THE UKRAINIAN CARPATHIANS AND CONDITIONS OF THEIR FORMAITION

Home > Archive > No. 4 (181) 2019 > 116-133


Geology & Geochemistry of Combustible Minerals No. 4 (181) 2019, 116-133.

https://doi.org/10.15407/ggcm2019.04.116

Ihor Popp, Petro Moroz, Mykhailo Shapovalov

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine,
e-mail: igggk@mail.lviv.ua

Abstract

The results of lithological, mineralogical and geochemical investigation of Cretaceous-Paleogene flysch deposits of the Ukrainian Carpathians are cited here. There are three main lithological-geochemical types of these deposits which differ in the composition of rock-forming ingredients of biogenic origin (SiO2 biog, CaCO3, Corg): grey limestone-clayey-terrigenous (type-I), non-carbonate or low-carbonate-clayey-terrigenous (type-II), and black carbonate-silica-terrigenous-clayey (type-III). The deposits of the first type are attributed to alkaline-oxic (oxic-calcitic), the second – to acid and low-alcaline oxic (oxic with redeposited glauconite), the third – to reducing (siderite, dolomite or ferrodolomite and low-reducing calcitic) and strong by reducing (primary-sulfidic or hydrogen sulfidic) mineralogical-geochemical facies. The forming of the Barremian-Albian (Shypot suite; Spas suite) and Oligocene (Menilite suite; Dusynska suite) organic-rich sediments in the Ukrainian Carpathians we associate with the phase of oceanic anoxic events OAE-1 and OAE-4 in the Carpathian segment of the Tethys, where anoxic reducing environments favoured to fossilization of huge amount of the dispersed organic matter. The structural-fabric features and composition of separate lithological types of silicites and diagenetic concretions of the Lower Cretaceous and Oligocene of the Ukrainian Carpathians show that their sedimentogenesis and diagenesis took place in conditions of strong oxygen deficit. The studied siliceous rocks can be considered as indicators of the anoxic events in the Carpathian segment of Tethys ocean. It is shown, that alcaline-reducting environments which was the most favourable for the diagenetic transformation of sedimentary organic matter in to petroleum hydrocarbons, prevailed in the organic-rich deposits of Oligocene age.

Keywords

sedimentogenesis, diagenesis, silica, carbonate, sulfides, organic matter, mineralogical-geochemical facies, Cretaceous-Paleocene flysch, Ukrainian Carpathians.

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