连通的黄河出现在早更新世:来自华北平原郑州钻孔的约束
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本文为国家自然科学基金项目(编号41972212,42030305)、河南省地质研究院地质科技攻关项目(编号2023- 909- XM018- KT01)和河南省自然资源科研项目(编号2020- 6,郑财招标采购- 2020- 475)联合资助的成果


The connected Yellow River first emerged during the Early Pleistocene:As evidenced by the findings from the Zhengzhou borehole in the North China Plain
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    摘要:

    大河的形成与构造活动和气候变化紧密相关,研究大河的形成历史有助于了解地球的演化过程。黄河是我国北方最大的河流,但其形成时代还存在较大争议。基于这一现状,我们选取黄河流出三门峡东流入海必经的开封坳陷开展沉积钻孔的古地磁、磁化率、粒度和碎屑锆石U- Pb年龄分析,结果表明钻孔ZK02底部已经打穿第四系,而钻孔ZK04底部的沉积时代为早更新世晚期。钻孔ZK02的沉积环境以河流相为主,而钻孔ZK04在1. 0~0. 15 Ma时为河流相、湖相沉积,自0. 15 Ma开始到顶部转变为黄土沉积。碎屑锆石U- Pb年龄物源示踪结果表明钻孔ZK04在1. 0~0. 15 Ma的物源主要来自秦岭东部,自0. 15 Ma 受邙山黄土的影响较大。钻孔ZK02的物源主要和黄河演化过程有关。三门峡东部的物质至少自2. 2 Ma已经出现在现今郑州附近。但是黄河上、中和下游的整体连通发生在1. 9~1. 6 Ma,这主要和区域内的湿润气候有关。黄河流域在0. 7~0. 5 Ma沉积物粒度显著变粗,这主要受中更新世气候转型的影响。类似现今华北地区的黄河和渤海分布格局在中更新世形成。钻孔ZK02在0. 15 Ma依然存在黄河的物质信号,说明黄河自2. 2 Ma流经该区域后,主要的河道形态并没有发生明显的摆动。

    Abstract:

    Thegenesis of fluvial systems is closely related to tectonic activities and climate fluctuations. Consequently, studying the historical development of rivers is crucial for comprehending the evolutionary processes of the Earth. The formation age of the Yellow River, the largest river in northern China, remains a subject of significant controversy. To address this issue, our study focused on the Kaifeng depression, a crucial passage through which the Yellow River flows eastward to the sea. Through sedimentary drilling, paleomagnetic analysis, magnetic susceptibility measurements, grain size analysis, and detrital zircon U- Pb age dating, we obtained several significant results. The ZK02 drilling core penetrated Quaternary strata, while the bottom of the ZK04 core was dated to approximately the late Early Pleistocene. The sedimentary environment at ZK02 was primarily fluvial, whereas ZK04 exhibited a transition from fluvial and lacustrine deposition between 1. 0 Ma and 0. 15 Ma to loess deposition from 0. 15 Ma to the present. Detrital zircon U- Pb age analysis revealed that the main sediment source for ZK04 between 1. 0 Ma and 0. 15 Ma was the eastern Qinling Mountains. However, since 0. 15 Ma, sediment composition has been significantly influenced by loess derived from the Mangshan Mountains. In contrast, the sediment provenance of ZK02 is primarily connected to the evolution of the Yellow River. Material from the eastern Sanmen Gorge region has been present near Zhengzhou and the Yellow River Delta for at least 2. 2 Ma. The connection between the upper, middle, and lower reaches of the Yellow River occurred between 1. 9 Ma and 1. 6 Ma, mainly driven by the humid climate conditions in the region. During the Middle Pleistocene, the Yellow River basin experienced a period of coarser sedimentation between 0. 7 Ma and 0. 5 Ma, primarily attributed to climate transitions. This period contributed to the formation of a distribution pattern similar to the current configuration of the Yellow River and the Bohai Sea in North China. The presence of material from the Yellow River in ZK02 at 0. 15 Ma indicates that the main channel morphology of the Yellow River has not experienced significant oscillations after flowing through this region since 2. 2 Ma.

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林旭,谢克家,刘静,宋睿智,刘海金,李庆康,任利平,赵少攀.2025.连通的黄河出现在早更新世:来自华北平原郑州钻孔的约束[J].地质学报,99(5):1773-1791.
LIN Xu, XIE Kejia, LIU Jing, SONG Ruizhi, LIU Haijin, LI Qingkang, RE Liping, ZHAO Shaopan.2025. The connected Yellow River first emerged during the Early Pleistocene:As evidenced by the findings from the Zhengzhou borehole in the North China Plain[J]. Acta Geologica Sinica,99(5):1773-1791.

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  • 收稿日期:2023-12-02
  • 最后修改日期:2024-03-17
  • 录用日期:2024-03-18
  • 在线发布日期: 2024-07-22