THE SPATIAL LOCALIZATION AND GENESIS OF THE ALLOCHTHONOUS CARBONATE CONCRETIONS IN THE DEPOSITS OF THE OLIGOCENE OF CARPATHIAN
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2017, Vol 22, Issue 1
Abstract
Problem Statement and Purpose. The main purpose of research – to prepare the foundations for the creation of geochemical model of the mineralogenesis process with participation of naphthenic hydrocarbons in terms of elision, infiltration and static hydrodynamic regimes. In addition, significant importance given for palaeogeographic reconstruction of conditions for the formation and tectonic-erosive destruction oil deposits of the Carpathian oil and gas province. Date & Methods. Formational analysis of the geological objects was carried out on the basis of the material, which was collected on the surface rocks occurrence in structural-facies zones of the Carpathians. Samples of the minerals were examined in polished surface, thin sections and with X-ray phase and luminescent methods. Results. The allochthonous carbonate concretions are found in sedimentary deposits of Oligocene age in Silezka, Skibova and Borislav-Pokutska zones. The comparison of scientific geological data is indicating on their identical spatial localization in Ukrainian and Polish Carpathians. Inside the concretions are incrustations, sometimes with oil and ozocerite. The number of successively formed minerals with simultaneous differentiation and saturation of hydrocarbons are formed the internal cavity. In most cases, this number is depending on the lithological composition of the rock, localization, stage-epigenetic changes. Differentiation of distribution of the hydrocarbons is define in the ultraviolet spectrum by the colors of luminescence: black – dark brown – brown – orange – yellow – bright white – blue. The genesis of cavities is defined by the processes of the consistent diagenetic lithification of the colloidal carbonate slurry of the precipitate. The further formation of cavities and cracks are due to the fracturing is caused by crystallization forces and invasion of hydrocarbons. The saturated hydrocarbons concretions are differ by the high stability in the environment of the hydrodynamic regime of the rivers of the Carpathians. This property at the established mineral and chemical composition is justify the development of a new technologyof the engineering hydrotechnic structures on the continental shelf and the continent.
Authors and Affiliations
G. M. Petrunyak
Keywords
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