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  3. 1(22) 2017
  4. Anoxic sedimentogenesis of ediacaran and silurian strata of south-western slope of the East-European platform

Anoxic sedimentogenesis of ediacaran and silurian strata of south-western slope of the East-European platform

JGD.
2017;
Volume 1(22) 2017, Number 1(22) 2017
: 42-54
https://doi.org/10.23939/jgd2017.01.045
Received: April 21, 2017
Authors:
  1. Natalia Radkovets
1
Institute of Geology and Geochemistry of Combustible Minerals of National Ukrainian Academy of Sciences

Purpose. The objective of this study was to investigate the depositional environments of organic-rich Ediacaran and Silurian strata on the south-western slope of the East-European platform. In particular, the factors facilitating the efficient fossilization of organic matter in marine sediments and which play the key role in black shales formation, are the basic elements of petroleum systems being considered. Methodology. Methodology is based on lithological investigations, which allowed establishing the material composition of rocks, the spatial extent of the successions under study and their thicknesses, and the range of occurrence in the sequence and reconstruction of palaeoenvironment in the studied age intervals. Results. Investigations of the organic-rich platform deposits of Ediacaran (Kalus beds) and Silurian have been performed. It was established that Kalus beds occur as a continuous band along the south-western slope of the East-European platform reaching the Ukrainian Shield. Their thickness is 90 meters and more within the Volyno-Podillya plate and Moldova plate, while in Dobrogea Foredeep it is 150 meters and more. For Silurian strata it was established that organic-rich deposits (argillites, marls) occur within the most subsided part of the platform, where the thicknesses of Silurian reach 700m and more. On the basis of lithological investigations the reconstruction of the paleo-environments in Ediacaran and Silurian, which caused the anoxic sedimentogenesis within these ranges of the geological history. It was established that the marine basin in Kalus times that covered the large territory of the craton Baltica, where the oxygen-minimum zone in the water column started at depths of maximum 100 meters. The reconstruction of the paleo-environment in Silurian shows that the basin had paleo-bathymetric zoning. Till depth was about 100m of deposited sulfate, clay-carbonate, and carbonate (reef) sediments, while the organic-rich ones were deposited at depths of over 100m within the oxygen-minimum zone. Originality. For Ediacaran deposits their occurrence, thicknesses, and petroleum-generating potential have been established. For Silurian the areas of the most prospective rocks’ occurrence have been elucidated. It was established that deposition of the organic-rich rocks has been controlled by the oxygen-minimum zone. Practical significance. Results of investigations allowed establishing the petroleum-generating potential for Ediacaran deposits and distinguishing the areas of occurrence of the most prospective organic-rich Silurian rocks (mudstones, marls), which represent a potential resource for shale gas exploration and production.

south-western slope of the East-European platform
Kalus beds
Silurian
anoxic event
oxygen-minimum zone
organic matter
shale gas

 

  1. Velikanov V. A., Aseeva E. A., Fedonkin M. A. Vend Ukrainy [Vendian of Ukraine]. Kyiv, "Naukova dumka" Publ. ["Scientific thought" Publ.], 1983, 164 p. (in Russian).
  2. Chebanenko I. I., Vishnjakov I. B., Vlasov B. I., Volovnik B. Ja., Dulub V., Znamenskaja T. A., Kir'janov V. V., Korenchuk L. V., Markovskij V. M., Medvedev A. P., Palienko V. P., Polkunov V. F., Pomjanovskaja G. M., Sen'kovskij Ju. N., Fil'shtinskij L. E., Cegel'njuk P. D., Shul'ga V. F., Jacenko G. M. Geotektonika Volyno-Podolii [Geotectonics of Volyn-Podillya]. Kyiv, "Naukova dumka" Publ. ["Scientific thought" Publ.], 1990, 244 p. (in Ukrainian).
  3. Gnilovskaja M. B. Vendotenidy [Vendotenides], Paleontologija verhnedokembrijskih i kembrijskih otlozhenij Vostochno-Evropejskoj platformy [Paleontology of Upper Precambrian and Cambrian deposits of the East European Platform]. Moskow, "Nauka" Publ. ["Sciense" Publ.], 1979, pp. 39–48 (in Russian).
  4. Dry`gant D. M. Ny`zhnij i serednij paleozoj Voly`no-Podil`s`koyi okrayiny` Sxidnoyevropejs`koyi platformy` ta Peredkarpats`kogo progy`nu [Lower and Middle Paleozoic of the Volyn-Podillyan margin of the East-European Platform and Carpathian Foredeep], Naukovi zapy`sky` Derzhavnogo pry`rodoznavchogo muzeyu [Scientific notes of the State Natural History Museum], 2000, Vol. 15, pp. 24–87 (in Ukrainian).
  5. Zelizna S. T., Plaksa Ya. P., Fil`cz D. I. Bituminologichne doslidzhennya my`n`kovecz`ky`x vidkladiv Pry`dnistrov'ya [Bituminological study of Mynkovets deposits of Prydnistrovia], Geologiya i geoximiya goryuchy`x kopaly`n [Geology and geochemistry of combustible minerals], 1971, Vol. 25, pp. 79–86 (in Ukrainian).
  6. Ivanciv O. Ye. Do litologiyi davnix svit Seredn`ogo Pry`dnistrov'ya [To lithology of the ancient suites of the Middle Prydnistrovia], Materialy` z geologiyi ta geoximiyi kory`sny`x kopaly`n Ukrayiny` [Materials on geology and geochemistry of minerals of Ukraine]. Kyiv, AN URSR Publ., 1962, pp. 49–57 (in Ukrainian).
  7. Krups'kyy Yu. Z. Heodynamichni umovy formuvannya i naftohazonosnist' Karpats'koho ta Volyno-Podil's'koho rehioniv Ukrayiny [Geodynamic conditions of formation and oil and gas content of Carpathian and Volyno-Podolian regions of Ukraine], Kyiv, UkrDGRI Publ., 2001, 144 p. (in Ukrainian).
  8. Lungersgauzen L. F. Nikiforova O. I. O stratigraficheskom otnoshenii silurijskih sloev Podolii k analogichnym slojam nekotoryh drugih mest Zapadnoj Evropy [About stratigraphic relation of Silurian strata of Podillya to analogical strata of some other places of Western Europe], Dokl. AN SSSR. [Reports of the Academy of Sciences of the USSR], 1942, new series, 34, N. 2, pp. 69–74 (in Russian).
  9. Rizun B. P. Chy`zh Ye. I. Osobly`vosti roztashuvannya ta sy`stematy`ka rozlomiv Voly`no-Podil`s`koyi ply`ty` [Peculiarities of occurrence and systematization of faults of the Volyn-Podillya plate], Dop. AN URSR [Reports of the Academy of Sciences of the USSR], 1986, Vol. 11, pp. 22–25 (in Ukrainian).
  10. Sen`kovs`ky`j Yu. M., Koltun Yu. V., Gry`gorchuk K. G., Gnidecz` V. P., Popp I. T., Radkovecz` N. Ya. Bezky`snevi podiyi okeanu Tetis [Anoxic events of the Tethys ocean], Kyiv, "Naukova dumka" Publ. ["Scientific thought" Publ.], 2012, 184 p. (in Ukrainian).
  11. Stashhuk M. F. Do straty`grafiyi davn`opaleozojs`ky`x vidkladiv Seredn`ogo Pry`dnistrov'ya [To stratigraphy of Early Paleozoic strata of the Middle Prydnistrovia], Geologichny`j zhurnal [Geological Journal], 1957, Vol. 2, pp. 38–48 (in Ukrainian).
  12. Chebanenko I. I. Dovgal' Ju. M., Palinskij R. V., Najdenov V. N., Klochko V. P., Tokovenko V. S. Tektonika i perspektivy neftegazonosnosti Severnogo Prichernomor'ja [Tectonics and oil and gas prospects of Northern Fore-Black Sea], Kyiv, Prep. AN USSR. I-nt geology`chesky`x nauk [Preprint of the Academy of Sciences of the Ukrainian SSR. Institute of Geological Sciences]. 1987, 46 p. (in Russian).
  13. Berger W. H., von Rad U. Cretaceous and Cenozoic Sediments from the Atlantic ocean. Initial Reports of the Deep Sea Drilling Project, (US Government Printing Office, Washington). 1972. Vol. 14, pp. 787–954.
  14. Berner R. A. Modeling atmospheric O2 over Phanerozoic time. Geochimica et Cosmochimica Acta. 2001, Vol. 65, pp. 685–694.https://doi.org/10.1016/S0016-7037(00)00572-X
  15. Craig J., Thurow J., Thusu B., Whitham A. A., Butarruma Y. Global Neoproterozoic Petroleum Systems: The Emerging Potential in North Africa. Geological Society, London, Special Publications, 2009, 326 p.
  16. Craig J., Biffi U., Galimberti R. F. The palaeobiology and geochemistry of Precambrian hydrocarbon source rock. Marine and Petroleum Geology. 2013. Vol. 113, pp. 401–407. https://doi.org/10.1016/j.marpetgeo.2012.09.011
  17. Curtis, J.B. Fractured shale-gas systems. AAPG Bulletin. 2002. Vol. 86, pp. 1921–1938.
  18. Kosakowski P., Radkovets N., Rauball J., Zakrzewski A. Occurrence and burial and thermal history of the Ediacaran strata (W-SW Ukraine and Moldova). 79th EAGE Conference & Exhibition 2017, Paris, France, 2017, pp. 75–80.
  19. Krzywiec P. Devonian-Cretaceous repeated subsidence and uplift along the Teisseyre-Tornquist zone in SE Poland - Insight from seismic data interpretation. Tectonophysics. 2009. Vol. 475, pp. 142–159. https://doi.org/10.1016/j.tecto.2008.11.020
  20. Lindsay J. F. Supersequences, superbasins, supercontinents – evidence from the Neoproterozoic–Early Palaeozoic basins of central Australia. Basin Research. 2002. Vol. 14, no. 2, pp. 207–223. https://doi.org/10.1046/j.1365-2117.2002.00170.x
  21. Nawrocki J. and Poprawa P. Development of Trans-European Suture Zone in Poland: from Ediacaran rifting to Early Palaeozoic accretion. Geolоgical. Quarterly. 2006. Vol. 50, pp. 59–76.
  22. Radkovets N. The Silurian of southwestern margin of the East European Platform (Ukraine, Moldova and Romania): lithofacies and palaeoenvironments. Geological Quarterly. 2015. Vol. 59, N. 1. Access Mode: DOI: org/10.7306/gq.1211.
  23. Radkovets N., Rauball J., Iaremchuk І. Silurian black shales of the Western Ukraine: petrography and mineralogy. Estonian Journal of Earth Sciences. 2017. Vol. 66, N. 3. Access Mode: DOI: org/10.3176/earth.2017.06.
  24. Schlanger S. O., Jenkyns H. C. Cretaceous oceanic anoxic events: causes and consequences. Geologie en Mijnbouw. 1976. Vol. 55, N. 3–4, pp. 179–184.
  25. Seghedi A., Vaida M., Iordan M., Verniers J. Paleozoic evolution of the Romanian part of the Moesian platform: an overview. Geologica Belgica. 2005. Vol. 8, N. 4, pp. 99–120.
  26. Sonnenberg S.A., Pramudito A. Petroleum geology of the giant Elm Coulee field, Williston Basin. AAPG Bulletin. 2009. Vol. 93, P. 1127–1153. https://doi.org/10.1306/05280909006
  27. Torsvik T. H., Smethurst M. A., Meert J. G., Van der Voo R., McKerrow W.S., Brasier M. D., Strut B. A., Walderhaug H. J. Continental break-up and collision in the Neoproterozoic and Paleozoic – a tale of Baltica and Laurentia. Earth Science Review. 1996. Vol. 40, pp. 229–258. https://doi.org/10.1016/0012-8252(96)00008-6
  28. Verniers, J., Maletz, J., Kříž, J., Žigait, Ž., Paris, F., Schönlaub, H.P., Wrona, R. Silurian. In: The Geology of Central Europe. Vol. 1: Precambrian and Palaeozoic. Geological Society, London, 2008, pp. 249–302.