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Development of the Integrated Approach to Stratigraphic Subdivision and Correlation of Middle–Upper Jurassic Deposits in Southeastern West Siberia
Stratigraphy and Geological Correlation ( IF 1 ) Pub Date : 2019-06-18 , DOI: 10.1134/s0869593819030055 I. V. Rychkova , M. I. Shaminova , V. V. Anosov , V. P. Ivanov
中文翻译:
西西伯利亚东南部中上侏罗统沉积物地层划分和相关性综合方法的发展
更新日期:2019-06-18
Stratigraphy and Geological Correlation ( IF 1 ) Pub Date : 2019-06-18 , DOI: 10.1134/s0869593819030055 I. V. Rychkova , M. I. Shaminova , V. V. Anosov , V. P. Ivanov
Abstract
On the basis of integrated paleobotanic, lithogeochemical, IR-spectrometric, and thermochemical studies, stratigraphic subdivision and correlation of productive Middle–Upper Jurassic sediments represented by the Tyumen and Naunak formations in the Dvoinaya and Snezhnaya areas (southeastern part of West Siberia, central Tomsk oblast) are carried out. A reliable basis is created for an optimal correction of reserves calculation and effective development of hydrocarbon deposits. It is found that the index species among paleobotanic remains of the Tyumen Formation are the ferns Coniopteris vialovae and Raphaelia diamensis and Czekanowskiales Czekanowskia irkutensis, Cz. rigida, and Phoenicopsis mogutchevae; for the Naunak Formation, it is Czekanowskia tomskiensis. This is due to the paleoclimatic environment which predetermined the compositions of plant communities and the species of coal-forming plants. For reliable correlation, a lithogeochemical study of sediments is carried out taking into account the analysis of coal origin. The difference in composition of plant complexes in the studied formations is confirmed by the difference in genetic properties of the marking coal-bearing deposits: degree of biochemical stability of the organic mass of the peat, gelification, and floristic restorability of the organic mass in coals, as well as yields of light and heavy hydrocarbons.中文翻译:
西西伯利亚东南部中上侏罗统沉积物地层划分和相关性综合方法的发展