渭河北迁与秦岭抬升

The northward shift of Weihe River and the uplift of Qinling Mountains

在测定陕西咸阳附近渭河 级阶地沉积剖面不同层位的年龄并推算出各主要层段的沉积速率后,表明自下而上沉积速率有逐渐增大的趋势,尤其是全新世阶段的更为明显,沉积速率变化趋势与秦岭及青藏高原隆升过程有准同步规律。结合在秦岭北侧观察到的具体沉积物北推的现象和全新世后期又恰是渭河北迁距离最大的事实,提出了渭河北迁的根本原因是秦岭的抬升。

As the Weihe River graben subsided constantly,this graben basin had accepted a huge of Cenozoic deposits.The very top part of these deposits,including a little of the Upper Pleistocene and the main part of the Holocene,was exposed at many sites of Weihe River second terrace.The exposed stratigraphic section of the Upper Pleistocene and the Holocene at Qilipu village, near Xianyang City,is about 15m thick.According to the characteristics of the rocks,it has been subdivided into nine strata ranging from the t...