Quaternary stratigraphy of Bayan borehole in eastern Songnen Plain and its paleoclimate significance.

ABSTRACT: The Songnen Plain is a key region for Quaternary stratigraphic research in Northeast China. In this area, the Quaternary strata of the Bayan borehole reached a thickness of 58.00 m, offering excellent potential for investigation and research. A comprehensive analysis of the borehole was conducted using lithological characteristics, optically stimulated luminescence (OSL), electron spin resonance (ESR), magnetic susceptibility, grain-size distribution, and magnetostratigraphy. Based on these results, a polarity stratigraphic framework was established, subdividing the sequence into four units: the Holocene Series (0-1.50 m), Guxiangtun Formation (1.50-18.80 m), Harbin Formation (18.80-35.50 m), and Huangshan Formation (35.50-58.00 m). Chronostratigraphic and paleoenvironmental interpretation

SUBMITTER: Song H 

PROVIDER: S-EPMC12399765 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature