Geochronology of the Yixian Formation in the Pingquan Basin, northern Hebei, and its geologic and paleontological evolution implications

doi:10.6038/cjg2025S0450

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	Geochronology of the Yixian Formation in the Pingquan Basin, northern Hebei, and its geologic and paleontological evolution implications
	Shen, ZhongShan 1; Yu, ZhiQiang 2; He, HuaiYu 2,4; Zhou, ZhongHe3,4
	2025-10-01
发表期刊	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
ISSN	0001-5733
卷号	68 期号:10 页码:3923-3937
通讯作者	Yu, ZhiQiang(zhiqiangyu@mail.iggcas.ac.cn)
摘要	We present an integrated geochronological-magnetostratigraphic framework for the Yixian Formation in the Shimen section, Pingquan Basin, northern Hebei Province, a key Jehol Biota-bearing succession. Rock magnetic investigations reveal that remanence carriers in the lower Yixian Formation are dominated by magnetite and hexagonal pyrrhotite, whereas those in the upper part are primarily magnetite. Zircon U-Pb dating of two tuff and tuffaceous sandstone intercalated layers yields weighted mean Pb-206/U-238 ages of 124.5 +/- 1.8 Ma and 126.9 +/- 1.4 Ma, respectively. High-resolution magnetostratigraphic data indicate a lower interval of reversed polarity and an overlying interval of normal polarity. Integrating the zircon U-Pb ages with the magnetostraphic results correlates the lower and upper intervals to chrons M3r and M3n of the geomagnetic polarity time scale 2020 (GPTS2020), respectively, indicating an early Barremian age for the Yixian Formation at Shimen section. These results provide constraints on the geologic and biologic events: (1) deposition of the Yixian Formation in the Pingquan Basin began no later than similar to 126 Ma, which sets the earliest presence of the Jehol Biota in this basin; and (2) the Yanshan Orogeny phase B in this area had terminated by similar to 126 Ma. The integrated chronological framework provides a robust basis for precise intra-and inter-basin correlations within the continental Lower Cretaceous of the Pingquan Basin and for correlation with global marine strata. It also offers a globally isochronous and reliable temporal framework for evaluating the spatiotemporal distribution and evolution of the Jehol Biota.
关键词	Jehol Biota Early Cretaceous Pingquan Basin Zircon U-Pb dating Magnetostratigraphy
DOI	10.6038/cjg2025S0450
关键词[WOS]	BOUNDARY STRATOTYPE SECTION ; BARREMIAN-APTIAN BOUNDARY ; SONGLIAO BASIN ; HYSTERESIS PROPERTIES ; ACQUISITION CURVES ; MAGNETOCHRON M0R ; TRACE-ELEMENTS ; CHINA CRATON ; POINT GSSP ; FAM. NOV
收录类别	SCI
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001594442300016
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24891
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Yu, ZhiQiang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher & Environm Coevolut, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Planetary Sci & Frontier Technol, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origin, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 101400, Peoples R China
推荐引用方式 GB/T 7714	Shen, ZhongShan,Yu, ZhiQiang,He, HuaiYu,et al. Geochronology of the Yixian Formation in the Pingquan Basin, northern Hebei, and its geologic and paleontological evolution implications[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2025,68(10):3923-3937.
APA	Shen, ZhongShan,Yu, ZhiQiang,He, HuaiYu,&Zhou, ZhongHe.(2025).Geochronology of the Yixian Formation in the Pingquan Basin, northern Hebei, and its geologic and paleontological evolution implications.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,68(10),3923-3937.
MLA	Shen, ZhongShan,et al."Geochronology of the Yixian Formation in the Pingquan Basin, northern Hebei, and its geologic and paleontological evolution implications".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 68.10(2025):3923-3937.