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Source rock potential and depositional environments of the Jurassic and Cretaceous coals from the Gyda Peninsula, Western Siberia/статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Bulatov T., Kozlova E., Leushina E., Vaitekhovich A., Pronina N., Goncharova A., Kul'kov M., Salakhidinova G., Butyrin R., Bashanova A., Torshina L., Spasennykh M.
- Журнал: International Journal of Coal Geology
- Том: 305
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1
- Последняя страница: 23
- Номер статьи: 104789
- Аннотация: Whether the coals in Western Siberia generated commercial volumes of liquid hydrocarbons is an important issuethat remains controversial because it has not yet been definitively resolved. Organic petrography andgeochemical investigations including Rock-Eval pyrolysis, elemental, isotope, and biomarker analyses werecarried out to characterize in detail the hydrocarbon generation potential, type of organic matter, and depositionalenvironment of the Cretaceous and Jurassic coals from the Gyda Peninsula in Western Siberia. The resultsindicate that the Jurassic coals primarily contain mixed gas-oil-prone Type II-III kerogen. In contrast, theCretaceous coals exhibit a diverse generation potential with varied proportions of gas- and oil-prone kerogentypes. Vitrinite reflectance of the studied coals suggests an immature to early mature stage for the Cretaceouscoals and the thermally mature stage for the Jurassic coals, which is supported by maturity-related biomarkerparameters and Tmax values. The carbon and nitrogen isotopic signatures in combination with biomarker dataand maceral composition predominantly indicate terrestrial input. The presence of retene and simonellite suggeststhe contribution of conifers. Based on the obtained results, the Jurassic coals were likely to be deposited inlimno-telmatic conditions with a rise in the water-level due to the sea expansion. The Cretaceous coals areprobably deposited in bogs developed on the lower delta plain in limno-telmatic to telmatic environments withsudden episodes of flooding. Considering the type and thermal maturity of organic matter, the Jurassic coalsshow strong potential for hydrocarbon generation.
- Добавил в систему: Пронина Наталия Владимировна
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