Author(s)

Jun Chen^1,2,3*, Shengxian Du^1,2,3, Cheng Chen^1,2,3, Fengchen Liu^1,2,3, Zhengguo Ning⁴, Xiangsuo Song^1,2,3, Shucai Liu^1,2,3, Huinan Lu⁵, Yongqing Liu⁶, Hongwei Kuang⁶

¹Shandong Institute of Geological Sciences, Jinan, China.
²Key Laboratory of Gold Mineralization Processes and Resources Utilization Subordinated to the Ministry of Land and Resources, Jinan, China.
³Key Laboratory of Metallogenic Geological Process and Resources Utilization in Shandong Province, Jinan, China.
⁴Shandong Institute of Geological Survey, Jinan, China.
⁵Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China.
⁶Insititute of Geology, Chinese Academy of Geological Sciences, Beijing, China.

The Bianqiao Formation (in the Pingyi Basin, Shandong Province, China) is a typical set of continuous lacustrine carbonate deposits during the Cretaceous-Paleogene period, which is considered as an ideal stratigraphic unit for KPB research. This study is based on the borehole PYZK01, which is located at Tongjiazhuang village in Bianqiao Town of Pingyi country. According to biostratigraphy research, the Bianqiao Formtion establishes one charophyte assemblage: Porocharaanluensis-Charayuntaishanensis var. acuta-Turbocharaspecialis, and one sporopollen assemblage: Deltoidosporaadriensis-Rugubivesiculites- Schizaeoisporites. This result indicates that the stratigraphic age during 0 - 12.25 m is the Paleogene, 37.8 m - 60 m is the Late Cretaceous, and 12.25 - 37.8 m is a transition stage from the Late Cretaceous to the Paleocene. By geochemical study, it was established carbon and oxygen isotopic strata in the drill. Through the magnetostratigraphy research, we find eight positive polarity zones and seven reversed polarity zones, build the magnetic polarity sequences of the borehole, and propose a contrast scheme with the international standard magnetic polarity time column. After comprehensive discussion, it is preliminarily believed that the Cretaceous-Paleogene boundary is located at the depth of 31.98 m in PYZK01, namely, in the first section of the Bianqiao Fm.

Cretaceous-Paleogene Boundary, Biostratigraphy, Isotopic Stratigraphy, Magnetostratigraphy, Pingyi Basin

Chen, J. , Du, S. , Chen, C. , Liu, F. , Ning, Z. , Song, X. , Liu, S. , Lu, H. , Liu, Y. and Kuang, H. (2019) A Research of the Cretaceous-Paleogene Boundary in the Pingyi Basin, Shandong Province. Open Journal of Geology, 9, 661-664. doi: 10.4236/ojg.2019.910068.