Stratigraphy of Upper Cretaceous and Cenozoic deposits of the Bakchar iron ore deposit (southwestern Siberia): New data

N. K. Lebedeva, O. B. Kuzmina, E. S. Sobolev, I. V. Khazina

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The results of complex palynological and microfaunistic studies of Upper Cretaceous and Cenozoic deposits of the Bakchar iron ore deposit are presented. Geochronologically, the age of the deposits varies from Campanian to Quaternary. It was established that the Slavgorod, Gan’kino, and Jurki (?) formations contain four biostratons in the rank of beds with dinocysts and three biostratons in the rank of beds with spores and pollen. The Cenozoic continental deposits contain four biostratons in the rank of beds, containing spores and pollen. As a result of the study, a large stratigraphic gap in the Cretaceous–Paleogene boundary deposits, covering a significant part of the Maastrichtian, Paleocene, Ypresian, and Lutetian stages of the Eocene, was established. The remnants of a new morphotype of heteromorphic ammonites of genus Baculites were first described in deposits of the Slavgorod Formation (preliminarily, upper Campanian). The distribution features of the different palynomorph groups in the Upper Cretaceous–Cenozoic deposits in the area of study due to transgressive-regressive cycles and climate fluctuations were revealed.

Original languageEnglish
Pages (from-to)76-98
Number of pages23
JournalStratigraphy and Geological Correlation
Volume25
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • baculites
  • Bakchar iron ore deposit
  • biofacies
  • biostratigraphy
  • Cenozoic
  • dinocysts
  • palynology
  • Tomsk oblast
  • Upper Cretaceous

Fingerprint

Dive into the research topics of 'Stratigraphy of Upper Cretaceous and Cenozoic deposits of the Bakchar iron ore deposit (southwestern Siberia): New data'. Together they form a unique fingerprint.

Cite this