Яндекс.Метрика

V.G. Eder,N.S.Balushkina, A.G. Zamirailova, A.N. Fomin

Выпуск: 2 , Том: 76 , Год издания: 2021
Сериальное издание: Moscow University Geology Bulletin
Страницы: 163-175

Аннотация

The regularities were determined for changes in the lithological and geochemical composition of rocks of the Bazhenov Formation (BF) characterized by various degrees of transformation of organic matter (OM). From the MK21 to MK2 stages (140-170-195 degrees C), trends are seen toward (a) an increase of the quantity of limestone-dolomitic interlayers along with the dolomite content; (b) a decrease of the OM content over the entire section; (c) a decrease of the OM and sulfide sulfur concentrations in the pyrite-kerogen band of the roof of the BF; (d) a decrease of the C/S ratio; and (e) an increase of the thickness of the pyrite layer in the transition zone between the BF and overlying sediments along with the growth of the pyrite content. It was concluded that the interval between the MK12 and MK2 stages experienced OM transformation, the migration of transformation products, dolomitization of the rocks, and pyritization of low-carbon rocks in the BF-overlying Podachimovo strata.

Оригинал статьи
индекс в базе ИАЦ: 036162