摘要
通过对峨嵋台地的构造史及台地上新生界地层特征的分析，阐述了自上新世（Ｎ２）以来，由于紫金山——峨嵋台地不等量抬升、峨嵋台地前缘断层等的活动，古汾河在中更新世后期彻底从台地上断流，而转向西流经稷山。
Having analysed the tectonic history and the characteristics of the strata (Cenozoic) of Emei Platform, the author finds that the former Fen River on Emei Platform has changed its flow direction several times since Pliocene epoch. Owing to the movements of Zhijin Mountain and Emei Platform, the river stopped flowing through Emei Platform in the middle Pleistocene epoch. From that time on, the river has flowed west through Xinjang Jishan and Hejin into Yellow River.
