Geological and paleooceanographic models of the Carpathian-Black Sea continental margin of the Tethys
Journal Title: Геодинаміка - Year 2016, Vol 21, Issue 2
Abstract
Purpose. To clear up geological-paleooceanographic conditions of sediment-lithogenesis of the Mesozoic-Cenozoic deposits of the Carpathian-Black Sea continental margin of the Tethys. Methodology. Multi-aspect complex approach of diagnostics of paleosedimentation environments includes comparative-lithologic, lithofacial, lithmological, facial-genetic and mineralogy-petrographic analyses. Results. In this work the primary fundamental problem of modern geology. i.e.: formation and evolution of sedimentary complexes of ancient continental margins has been reviewed. A series of geological-paleooceanographic models of sedimentation environments has been made and sedimentary associations for specific ages of the late Mesozoic and Cenozoic Carpathian-Black Sea continental margin of the Tethys have been distinguished. Regional features of space-age spread of terrigenous, carbonaceous, siliceous, volcanic and mixed sediments of the Late Jurassic, Early and Late Cretaceous, Eocene and Oligocene-Early Miocene ages have been characterized. In addition to that sedimentary formations associated with both the first (shelf carbonate bank-reef and terrigenous alluvial delta formations) and the second level of sedimentation (fen’s foot of the continental slopes, the formation of mesopelagic plains) have been localized. Originality. Geological-paleooceanographic models allowed to recreate a complete picture of the evolution of sedimentation processes influenced paleooceanographic complex factors such as eustatic changes in sea level, global anoxic events, etc. The proposed concept of the evolution of the Carpathian-Black Sea continental margin of the Tethys in terms of processes of avalanche sedimentation on various structural levels, namely on the shelf and at the foot of the continental slope, allowed in a new way to explain the formation of these sedimentary strata, where the sea level fluctuations controlled distribution of sedimentary material between epipelagic and mesopelagic parts of basins. Practical significance. Sedimentary formations associated with both the first (shelf carbonate bank-reef and terrigenous alluvial delta formations) and the second level of avalanche sedimentation (fen’s foot of the continental slopes) have been established. These sediment accumulation bodies represent important objects prospective for oil and gas in the ancient and modern sedimentary basins of the oceans. Identification of these formations within the ancient Carpathian-Black Sea continental margin of the Tethys provides new data on the oil and gas bearing potential of the region
Authors and Affiliations
Y. Senkovskyi, V. Gnidets, K. Grigorchuk, I. Popp, N. Radkovets, M. Moroz, P. Moroz, A. Rever, L. Balandyuk, O. Kohan, G. Gavryshkiv
Keywords
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