Paleomagnetism of the upper cretaceous and the lower paleogene deposits of Western Siberia (Aleiskaya area)
The paper discusses the results of paleomagnetic studies of the Upper Cretaceous and the Lower Paleogene sediments of the South of Western Siberia (Aleiskaya area). Two wells with a total thickness of 305 m studied. On the basis, characteristic component of the natural remanent magnetization (ChRM) built paleomagnetic columns for each well. The comparison of well sections between them performed. Based paleomagnetic, geological-stratigraphical and paleontological [Podobina et al., 2011] data developed the magnetostratigraphic section of the Upper Cretaceous and the Lower Paleogene sediments Western Siberia (Aleiskaya area). There are five magnetozones: one normal and four reversals polarity representing sediments of the Upper Cretaceous and the Lower Paleogene. The lower part of the Gan’kino horizon of normal polarity forms one normal polarity magnetozone N. The upper part of the Gan’kino horizon was characterize two magnetozones of reversal polarity - R 1km and R 2mt. The Lower Paleogene Talitsa and Lulinvor formations form two magnetozones of reversal polarity - R 1zl and R 2i. Two variants the comparison the lower normal polarity of part of the magnetostratigraphic section of Western Siberia (Aleiskaya area) with the world magnetochronological scale [Gradstein et al., 2008] discussed.