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REINTERPRETATION OF GEOLOGICAL DATA AS TO THE TECTONICS OF SEPARATE COVERS AND SUBCOVERS OF THE OUTER CARPATHIANS (in the context of prospects for oil and gas presence)

Home > Archive > No. 1–2 (193–194) 2024 > 5–21


Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 5–21

https://doi.org/10.15407/ggcm2024.193-194.005

Volodymyr SHLAPINSKY, Myroslav PAVLYUK, Olesya SAVCHAK, Myroslav TERNAVSKY

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

Abstract

In spite of a number of preliminary investigations, the Ukrainian portion of the Outer Carpathians continues to be the object for scientific discussions of the modern geologists. Studied area is located in the Rakhiv district of the Transcarpathian Region in the upper stream of the right tributaries of the Tysa River: Mala Shopurka, Middle River and Kosiv. The following covers and subcovers of the Outer Carpathians participate in the geological feature (from souht-west to north-east): Burkut, Duklya, Duklya-Chornohora (Hoverla-Krasnoshora subcover) and Krosno (Bitlya-Svydovets subcover). This area was the study subject for geologists from different organizations. Its geological feature is restorated at modern maps of the Ukrainian Carpathians published relatively not long ago. One of them is geological map at a scale of 1 : 200,000 published at the Polish Geological Institute, Warsaw, in 2 stages in 2004 and 2007. The second group of maps at a scale of 1 : 200,000 of the Carpathian series was published under the aegis of the Ministry of Environmental Protection of Ukraine. It was fulfilled by the workers of NAC “Nadra Ukrainy” of the SE “Zakhidukrgeologia” of the Lviv and Transcarpathian Geological Research Expedition.

The object of our studying is located on the Nadvirna sheet of map, prepared for publication by the group of geologists under the leadership of B. V. Matskiv (2009). Both published maps contain insufficient information on the geological feature of the given plot of the Carpathians. Thus, the necessity has arisen to present the variant of geological map at a scale of 1 : 50,000 of our development. Such geological map was compiled mainly with usage of materials of geological surveying at a scale of 1 : 50,000 executed in 1981–1985 under the leadership of V. O. Vashchenko. Materials of over 1,000 exposures were analyzed. This has enabled us to reconstruct the geological feature of this region more precisely. Covering tectonics of the given area that was represented at the maps of precursors too, was verified and supplemented with the existence of a number of arterial fractures of strike-slip type, the existence of olistostrom horizons in the Upper Cretaceous deposits of the Hoverla-Krasnoshora subcover and Lower Cretaceous Burkut subcover.

Keywords

covers, subcovers, fractures, flysch, tectonic, remnants, olistostrom, diabases

Referenses

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Danysh, V., Hnylko, O., Pavlyuk, M., Tsarnenko, P., Jankowski, L., Kopciowski, R., Ryłko, W., Anastasiu, N., Dragan, E., Popa, M., & Roban, R. (2007). Geological Map of the Outer Carpathians: Borderland of Ukraine and Romania. 1 : 200 000 (L. Jankowski, R. Kopciowski & W. Ryłko, Eds.). Warsaw: Polish Geological Institute.

Gabinet, M. P., Kulchitskiy, Ya. O., & Matkovskiy, O. I. (1976). Geologiya i poleznyye iskopayemyye Ukrainskikh Karpat (Part 1). Lvov. [in Russian]

Glushko, V. V., & Kruglov, S. S. (Eds.). (1971). Geologicheskoye stroyeniye i goryuchiye iskopayemyye Sovetskikh Karpat: Trudy UkrNIGRI, 25. [in Russian]

Kruhlov, S. S. (1961). Kreidovi vulkanichni utvorennia p. Trostiantsia v Skhidnykh Karpatakh. Dopovidi AN URSR, 10, 1350–1352. [in Ukrainian]

Kuzovenko, V., & Shlapinskyi, V. (2007). Do pryrody y umov rozmishchennia “skel” neokomskykh diiabaziv u Burkutskomu pokrovi Ukrainskykh Karpat. Pratsi Naukovoho tovarystva imeni T. Shevchenka. Heolohichnyi zbirnyk, 19, 40–49. [in Ukrainian]

Matskiv, B. V., Pukach, B. D., Vorobkanych, V. M., Pastukhanov, S. V., & Hnylko, O. M. (2009). Derzhavna heolohichna karta Ukrainy. Masshtab 1 : 200 000. Karpatska seriia. Arkushi: M-34-XXXVI (Khust), L-34-VI (Baia-Mare), M-35-XXXI (Nadvirna), L-35-I (Visheu-De-Sus). Kyiv. [in Ukrainian]

Tsarnenko, P. N. (1969). Do stratyhrafii kreidianykh vidkladiv Chornohorskoi zony v raioni s. Yasinia. Dopovidi AN URSR. Seriia B. Heolohiia, heohrafiia, khimiia. [in Ukrainian]

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Shlapinskyi, V. Ye. (2009). Mikrofauna v olistostromovykh utvorenniakh verkhnoi kreidy Hoverlianskoho subpokrovu v raioni Yasini. In P. F. Hozhyk (Ed.), Vykopna fauna i flora Ukrainy: paleoekolohichnyi ta stratyhrafichnyi aspekty: zbirnyk naukovykh prats Instytutu heolohichnykh nauk NAN Ukrainy (pp. 179–183). Kyiv. [in Ukrainian]

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Vashchenko, V. A. (1985). Otchet po gruppovoy geologicheskoy syemke massshtaba 1 : 50 000 teritorii Ivano-Frankovskoy i Zakarpatskoy oblastey USSR za 1981–1985 gg. (Vol. 1) [Research report]. Kiev: Fondy DP “Zakhidukrheolohiia”. [in Russian]

Vialov, O. S., Danysh, V. V., & Tsarnenko, P. N. (1969). Deiaki novi uiavlennia pro tektoniku Skhidnykh Karpat. Heolohichnyi zhurnal, 29(5), 23–35. [in Ukrainian]

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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 otlozheniy Ukrainskikh Karpat. Kiev: Naukova dumka. [in Russian]

Zhilovskiy, N. I. (1963). Geologicheskoye stroyeniye i otsenka perspektiv neftegazonosnosti yugo-zapadnogo sklona Ukrainskikh Karpat [Candidateʼs thesis]. Lvov. [in Russian]


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EVOLUTION OF CONDITIONS OF SEDIMENTOGENESIS IN THE CARPATHIAN FLYSCH BASIN IN THE CRETACEOUS-PALEOGENE

Home > Archive > No. 3–4 (191–192) 2023 > 86–104


Geology & Geochemistry of Combustible Minerals No. 3–4 (191–192) 2023, 86–104

https://doi.org/10.15407/ggcm2023.191-192.086

Ihor POPP, Halyna HAVRYSHKIV, Yulia HAIEVSKA, Petro MOROZ, Mykhailo SHAPOVALOV

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, е-mail: itpopp @ukr.net

Abstract

The aim of this work is to show the evolution of geological-paleoceanographic and geochemical conditions of sedimentation in the segment of Carpathians of the Tethys Ocean. And also, selection of the basic stages of sedimentogenesis, to which the formation of oil and gas parent and oil- and gas-bearing deposits is timed.

In the article, the authors showed the lithologic-genetic classification of the Cretaceous-Paleogene flysch of the Ukrainian Carpathians. Authors distinguished the lithologic-geochemical types of sedimentation son the basis of geochemical terms of sedimentation, and also lithologic-facies types of sedimentation on the basis of features of terrigenous sedimentation.

Four stages of sedimentogenesis in the history of geological and paleoceanographic development of the Carpathian sedimentary basinare described in the article: Early Cretaceous (stage I), Late Cretaceous (stage II), Paleocene-Eocene (stage III), Oligocene-Early Miocene (stage IV), each of which has specific geochemical conditions of sedimentogenesis and diagenesis.

It is shown that forming of Cretaceous-Paleogene flysch deposits of Ukrainian Carpathians took place under action of very changeable geological-paleoceanographic and geochemical factors the joint action of that stipulated oil and gas capacity of this sedimentary complex. The thick series of psamitolites were formed in periods of avalanche terrigenous sedimentation, that are the reservoirs of hydrocarbons. Formation of bituminous parent-rocks-of-oil siliceous-clayed sedimentation is related to deceleration of processes of terrigenous sedimentation and phases of ocean anoxic events of ОАЕ-1 (Barremian–Albian) and ОАЕ-4 (Oligocene).

Keywords

Carpathian flysch basin, sedimentogenesis, flysch, geological-paleoceanographic and geochemical conditions, oil and gas potential

Referenses

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FACIAL FEATURES OF THE PALEOCENE-EOCENE DEPOSITS OF ADVANCED UNITS OF THE SKYBA ZONE OF UKRAINIAN CARPATHIANS

Home > Archive > No. 3–4 (185–186) 2021 > 44–55


Geology & Geochemistry of Combustible Minerals No. 3–4 (185–186) 2021, 44–55.

https://doi.org/10.15407/ggcm2021.03-04.044

Halyna HAVRYSHKIV1, Yuliya HAIEVSKA2

1, 2 Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: 1galinah2404@gmail.com; 2yuhaievska@ukr.net

Abstract

There three main types of facies of Paleocene-Eocene complexes: sandy, siltstone and argillite distinguished within the study area by the nature of the distribution of the strata of the forming components were highlighted. Тhey accumulated avalanche at the foot of the continental slope and formed various facial parts of the foehn (Upper, Middle and Lower foehn). In the upper part of the Foehn was accumulated coarse-grained sediments (clusters of deep boulders and other psephyto-psammitic material containing edaphogenic rocks). Under the action of geostrophic and bottom currents, silt streams of pelitic and psammitic material moved in the direction to the south and south-east of the Carpathian sedimentation basin, forming sandy-clay and clay facies (Middle and Lower foehn). During the turbidite movement of a large amount of sediment from the first (shelf) to the second (foot of the continental slope) level of avalanche sedimentation, sorting and distribution of sediments on the continental slope took place. Based on the analysis of the material composition of Paleocene-Eocene sediments of the study area by such criteria as the size of the fragment, sedimentary textures and the ratio of different rocks, 7 facies were identified, which were deposited as gravitational flows down on the continental slope. Reconstructions of Paleocene-Eocene age flysch deposits showed that terrigene material in the studied sedimentation basin came from two sources – one of which was northwest of the study area and was characterized by a predominance of coarse-grained sandy sediments, while the source wear, which was in the central part of the studied basin was characterized by a predominance of clay silt and fine-grained psammitic material. This nature of the distribution of terrigenous material had a decisive influence on the further formation of Paleocene end Eocene sedimentary strata in the process of sedimentogenesis and post-sedimentary transformations of sediments, and on the formation of reservoir rocks and rocks with potential reservoir properties for hydrocarbon exploration. It has been established that the composition of the Psamitolites of the flysch formation of the Paleocene and Eocene ages of the Carpathians was formed on the passive continental margin or in the inland and boundary seas, and their genesis mostly corresponds only to the platform source of material wear.

Keywords

Paleocene, Eocene, facies, sandstone, flysch, continental slope, sedimentation

Referenses

Afanas’eva, I. M. (1983). Litogenez i geokhimiya flishevoi formatsii severnogo sklona Sovetskikh Karpat. Kiev: Naukova dumka. [in Russian]

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Havryshkiv, H. Ya. (2019). Mineraloho-petrohrafichni osoblyvosti paleotsenovykh vidkladiv Berehovoi i Orivskoi skyb Ukrainskykh Karpat v aspekti yikh naftohazonosnosti [Extended abstract of sandidateʼs thesis]. Instytut heolohii i heokhimii horiuchykh kopalyn NAN Ukrainy. Lviv. [in Ukrainian]

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