The lithofacies zonality and lithmological structure of Eifelian deposits of Dobrudja Foredeep
Journal Title: Геодинаміка - Year 2016, Vol 20, Issue 1
Abstract
Purpose. The main purpose of this work is studying of lithology features of sedimentary complex of Eifelian age within Biloliskyi block of Dobrudja Foredeep. Methods. Methods include lithofacial, lithmological and mineralogy-petrographical analyses. Results. Lithology structure of sections of Eifelian deposits has been determined. It is presented with variable interlayering of sulphate (anhydrites), carbonate (limestones, dolomites, and marlstones) and terrigenous (sandstones, siltstones, argillites) rocks. Six types of deposit section have been distinguished: dolomite-limestone-anhydrite, dolomite (limestone)-marlstone-anhydrite, argillite-marlstone-anhydrite, anhydrite-limestone-dolomite, dolomite-anhydrite-limestone, dolomite-anhydrite-marlstone; which characterized by some lateral zonality of occurrence, that constructed lithologic models display. Thus, anhydrites dominate in the sections of south-western part, dolomites and limestones in the sections of northern and southern, marlstones and argillites in the sections of central part of Biloliskyi block. Regional distribution of basal carbonate-terrigenous-clayey measures, which represents intergrade layers from terrigenous deposits of Lower Devonian to sulphate-carbonate deposits of Middle and Upper Devonian, has been determined. Petrographic features of main types of rocks have been studied in detail. The lithmological sections have been done. They show that Eifelian strata is characterized by storied structure that developed in four regional and subregional sulphate bedsets, demarcated by terrigenous-carbonate horizons. Scientific novelty. For the first time lithologic sections of Eifelian deposits and their typification have been done. The lithofacies and lithmological models have been constructed, which allow turning out spatial-age variation of lithologic structure of sedimentary deposits of Eifelian age. Practical significance. Studying of features of lithologic structure of strata, making lithofacies and lithmological models will contribute to clarification of some stratigraphical questions, finding out spatial-temporal occurrence of sedimentary complexes of different composition and genesis sediments. All this serves for geologic (lithogenetic) basis for more reasonable prognosis of spatial- temporal occurrence oil and gas objects connected, first of all, with limestone-dolomite accumulated bodies.
Authors and Affiliations
V. Hnidets, K. Hryhorchook, L. Koshil, N. Tsyzh, M. Yakovenko
Keywords
Related Articles
- EP ID EP194283
- DOI 10.23939/jgd2016.01.050
- Views 129
- Downloads 0
The three-dimensional geoelectric model of earth crust and upper mantle of the Dobrudga region
Purpose. The purpose of researches is to build a three-dimensional geoelectric model of the crust and upper mantle and to answer some questions of the deep structure and geodynamics of the North Dobrudga and PeriDobrudga...
Regional quasigeoid determination: an application to Arctic gravity project
Purpose. Investigation to study quasigeoid computations based on the regional gravimetric data and different types of nonorthogonal basis functions was assessed to be important. When measurements from only restricted reg...
Structure of the lateral extrusion in the Carpathians
Purpose. The aim is to identify the structural forms of the lateral extrusion in the Western Ukrainian Carpathians and to create the preliminary conceptual model of its forming. Methodology. Methods of the geological map...
Predicting of oil-gas-water-saturation of rocks of different lithology and geodynamic genesis in open-casts of wells
Purpose. The aim of the work is developing the methodology of the prediction of oil-gas-water-saturation of rocks in open-casts of wells based on the data of acoustic (seismic) logging (АL, SL) and core research (CR) and...
Mathematical simulation of frequency sounding with electromagnetic field in a locally inhomogeneous half-space
Purpose. In order to adequately describe real processes that characterize the spread in the crust harmonic electromagnetic field (EMF) excited by artificial sources , unlike classical models (homogeneous and piecewise ho...