Open AccessParagenesis of the Upper Jurassic-Lower Cretaceous Sediments in the Priverhoyansky and Indigiro-Zyryansky Basins
Author(s) -
A.I. Sivtsev,
И. Н. Зуева,
O. N. Chalaya
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/272/2/022122
Subject(s) - geology , cretaceous , facies , structural basin , petrography , lithology , paleontology , sedimentary rock , source rock , geochemistry
The results of comparison geological-geochemical study of the Upper Jurassic-Lower Cretaceous sediments of the Preverkhoyansky and Indigiro-Zyryansky basins are considered from the positions of uniform sedimentary basin evolution. Based on lithologic-petrographic data the differences were established in the catagenetic transformations degree of the organic matter (OM) of the Upper Jurassic-Lower Cretaceous deposits from MC 3 within the Preverkhoyansky basin and up to MC 5 - in the Indigiro-Zyryansky. The distinctions are due, mainly, by a post-collision stage of development of the territory of the Indigiro-Zyryansky basin. The geochemical characteristic of organic matter is given. The identity of composition and distribution of hydrocarbons-biomarkers indicates a common source of the initial OM formed in the conditions of continental facies in the Preverkhoyansky basin. Contrary, OM accumulation of the Upper Jurassic deposits of the western part of the Indigiro-Zyryansky basin occurred in sea and lagoon facies. OM enriched by sapropel material that indicated more oil generation potential of rocks. Based on analysis of the received results the map of prospects of oil-and-gas bearing with allocation of sites for conducting prime exploration works on oil and gas is constructed for the Upper Jurassic-Lower Cretaceous deposits of the Preverkhoyansky and Indigiro-Zyryansky basins.