干旱区生态安全与可持续发展服务平台

Northeastern Tibetan Plateau paleo-Yellow River drainage expansion at-3 Ma linked to the East Asian summer monsoon intensification☆

Guo, Benhong ， Gao, Jiechang ， Qin, Zhenghao ， Niu, Fuhang ， Wang, Yindi ， Peng, Tingjiang ， Liu, Shanpin ， Liu, Chengying ， Nie, Junsheng

2026-02-15 GEOMORPHOLOGY 2026   495(卷), null(期), (null页)

查看原文

  • JCR分区:

    影响因子:

    • The fluvial terrace sequences in the northeastern Tibetan Plateau indicate that the modern Yellow River primarily originated in the Lanzhou Basin around 1.8 Ma and subsequently extended into the interior of the Tibetan Plateau through headward erosion. However, the evolutionary history and driving mechanisms of the paleo-Yellow River during the Pliocene-Pleistocene, prior to the formation of the modern Yellow River system, remain unclear despite its establishment by-3.6 Ma. In this study, we present the new results of magnetic susceptibility and combined with previous sedimentological analyses and detrital zircon U-Pb ages of fluvial sequences spanning the interval of-3.6-2.2 Ma in the Lanzhou Basin, in the northeastern Tibetan Plateau. Our results reveal a rapid increase in the sediment supply into the Lanzhou Basin from the northeastern Tibetan Plateau at-3 Ma, signaling an expansion of the paleo-Yellow River drainage system at this time. This Late Pliocene drainage system expansion coincides with the intensification of the East Asian summer monsoon, which may reflect interactions between the evolution of the paleo-Yellow River and climate change.

    关键词

    Fluvial system Lanzhou basin Late pliocene Provenance Drainage expansion

    相关推荐