The Evolution of Bioclasts during Catagenesis in Rocks of the Bazhenov Formation in the Territory of the Frolov Oil and Gas Region

• Published in: Moscow University geology bulletin Vol. 78; no. 6; pp. 796 - 804
• Main Authors: Marunova, D. A., Pronina, N. V., Kalmykov, A. G., Ivanova, D. A., Savostin, G. G., Vaitechovich, A. P., Kalmykov, G. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2023; Springer Nature B.V
• Subjects: Catagenesis; Earth and Environmental Science; Earth Sciences; Geology; Organic matter; Reflectance; Rocks; onychites; bioclasts; coal petrography; Bazhenov Formation; laboratory modeling of kerogen transformation; organic matter; catagenetic transformation; maceral composition; calcespheres
• ISSN: 0145-8752; 1934-8436
• DOI: 10.3103/S014587522306011X

The results of the studies of organic matter in the rocks of the Bazhenov Formation in the territory of the Frolov oil and gas region of the West Siberian basin are presented. The maceral composition of the sediments is represented by bituminite and alginite, redeposited vitrinite, as well as bioclasts: onychites and calcespheres organic matter. The investigation was focused on bioclasts. Their coal petrographic characteristics and change in the process of catagenesis are described; qualitative parameters to access the degree of bioclast maturity are established; as well, an initial formula for converting the onychite reflectance to the equivalent of vitrinite reflectance is proposed.