TY - JOUR

T1 - Paleomagnetism and magnetostratigraphy of Upper Cretaceous and Cretaceous-Paleogene boundary intervals, southern Kulunda basin (West Siberia)

AU - Gnibidenko, Z. N.

AU - Levicheva, A. V.

AU - Semakov, N. N.

AU - Rusanov, G. G.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The study presents new paleomagnetic data on the Upper Cretaceous and Cretaceous-Paleogene boundary intervals of the southern Kulunda basin (Alei area), which were obtained from core samples collected from a 305-m-thick section penetrated in two wells. The paleomagnetic sections of each well were compiled and correlated based on the characteristic remanent magnetization (ChRM). Paleomagnetic, geological, stratigraphic, and paleontological data were used to compile the Upper Cretaceous and Cretaceous-Paleogene magnetostratigraphic section of the southern Kulunda basin. The magnetostratigraphic section consists of five magnetozones, one normal polarity zone, and four reversed polarity zones spanning the Upper Cretaceous and Lower Paleogene. The lower part of the Gan'kino Horizon, showing normal polarity, forms a single normal polarity magnetozone N. The upper part of the Gan'kino Horizon comprises two reversed polarity magnetozones (R1km and R2mt). The Talitsa and Lyulinvor Formations of Lower Paleogene age correspond to two reversed polarity magnetozones (R1zl and R2i). The compiled Upper Cretaceous and Lower Paleogene magnetostratigraphic section was correlated with the geomagnetic polarity time scale. Two options were considered for correlating the lower normal polarity part of the section with geomagnetic polarity time scale of Gradstein.

AB - The study presents new paleomagnetic data on the Upper Cretaceous and Cretaceous-Paleogene boundary intervals of the southern Kulunda basin (Alei area), which were obtained from core samples collected from a 305-m-thick section penetrated in two wells. The paleomagnetic sections of each well were compiled and correlated based on the characteristic remanent magnetization (ChRM). Paleomagnetic, geological, stratigraphic, and paleontological data were used to compile the Upper Cretaceous and Cretaceous-Paleogene magnetostratigraphic section of the southern Kulunda basin. The magnetostratigraphic section consists of five magnetozones, one normal polarity zone, and four reversed polarity zones spanning the Upper Cretaceous and Lower Paleogene. The lower part of the Gan'kino Horizon, showing normal polarity, forms a single normal polarity magnetozone N. The upper part of the Gan'kino Horizon comprises two reversed polarity magnetozones (R1km and R2mt). The Talitsa and Lyulinvor Formations of Lower Paleogene age correspond to two reversed polarity magnetozones (R1zl and R2i). The compiled Upper Cretaceous and Lower Paleogene magnetostratigraphic section was correlated with the geomagnetic polarity time scale. Two options were considered for correlating the lower normal polarity part of the section with geomagnetic polarity time scale of Gradstein.

KW - Lower Paleogene

KW - magnetostratigraphy

KW - orthozone

KW - paleomagnetism

KW - reversal

KW - southern Kulunda basin

KW - Upper Cretaceous

KW - West Siberia

UR - http://www.scopus.com/inward/record.url?scp=85013141952&partnerID=8YFLogxK

U2 - 10.1016/j.rgg.2016.12.004

DO - 10.1016/j.rgg.2016.12.004

M3 - Article

AN - SCOPUS:85013141952

VL - 58

SP - 87

EP - 98

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 1

ER -