OJGOpen Journal of Geology2161-7570Scientific Research Publishing10.4236/ojg.2019.910068OJG-95296ArticlesEarth&Environmental Sciences A Research of the Cretaceous-Paleogene Boundary in the Pingyi Basin, Shandong Province JunChen1*ShengxianDu1ChengChen1FengchenLiu1ZhengguoNing2XiangsuoSong3ShucaiLiu4HuinanLu5YongqingLiu6HongweiKuang6Key Laboratory of Metallogenic Geological Process and Resources Utilization in Shandong Province, Jinan, ChinaNanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, ChinaShandong Institute of Geological Sciences, Jinan, ChinaInsititute of Geology, Chinese Academy of Geological Sciences, Beijing, ChinaShandong Institute of Geological Survey, Jinan, ChinaKey Laboratory of Gold Mineralization Processes and Resources Utilization Subordinated to the Ministry of Land and Resources, Jinan, China20092019091066166416, August 201921, September 2019 24, September 2019© Copyright 2014 by authors and Scientific Research Publishing Inc. 2014This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/

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 BasinAcknowledgements

This study was supported by the China Geological Survey Project “Study on Shandong Paleogene Stratigraphic Division Comparative” (1212011120146) and Major Innovative Project of Shandong Province “Exploration and Exploitation of Deep Earth Resources” and “Study on oil and gas occurrence conditions in the Riqingwei Basin in east sea of Shandong province” (2017CXGC1608), “Deep structure of Yishu fault zone and its impact on resources and environment” (2017CXGC1602). This is a contribution to UNESCO-IUGS IGCP Project 679.

Conflicts of Interest

The authors declare no conflicts of interest regarding the publication of this paper.

Cite this paper

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

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