Callovian and Upper Jurassic foraminiferal and ammonite biostratigraphy of the Shaim petroleum region (West Siberia)

• Published in: Russian geology and geophysics Vol. 56; no. 6; pp. 932 - 946
• Main Authors: Levchuk, L.K., Nikitenko, B.L., Meledina, S.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2015; Allerton Press
• Subjects: Ammonites; Ammonoidea; Asia; assemblages; biostratigraphy; Callovian; Cephalopoda; Commonwealth of Independent States; Economic geology; energy sources; Foraminifera; foraminifers; Jurassic; Khanty-Mansi Russian Federation; Kimmeridgian; Mesozoic; microfossils; Middle Jurassic; Mollusca; oil and gas fields; Oxfordian; Russian Federation; sedimentary rocks; Shaim petroleum region; Shaim Russian Federation; stratigraphic columns; stratigraphy; Tyumen Russian Federation; Upper Jurassic; Volgian; West Siberia; foraminifers; Oxfordian; Volgian; West Siberia; ammonites; Kimmeridgian; Callovian; biostratigraphy; Shaim petroleum region
• ISSN: 1068-7971; 1878-030X
• DOI: 10.1016/j.rgg.2015.05.009

The results of biostratigraphic analysis of foraminiferal assemblages were used to identify a nearly complete succesion of biostratigraphic units in the Callovian-Upper Jurassic section of the Shaim region. The finds of the ammonites from different parts of the Callovian-Volgian sections helped to correlate the identified foraminiferal biostratigraphic units to the General Stratigraphic Scale. Analysis of variations in the taxonomic composition and structure of foraminiferal assemblages allowed refinement of paleontological characteristics of the foraminiferal biostratigraphic units for different facies conditions in the southwest of the West Siberian Basin.