Abstract
The Wufo Basin at the margin of the northeastern Tibet Plateau connects the upstream reaches of the Yellow River with the lowland catchment downstream, and the fluvial terrace sequence in this basin provides crucial clues to understand the evolution history of the Yellow River drainage system in relation to the uplift and outgrowth of the Tibetan Plateau. Using field survey and analysis of Digital Elevation Model/Google Earth imagery, we found at least eight Yellow River terraces in this area. The overlying loess of the highest terrace was dated at 1.2 Ma based on paleomagnetic stratigraphy (two normal and two reversal polarities) and the loess-paleosol sequence (12 loess-paleosol cycles). This terrace shows the connections of drainage parts in and outside the Tibetan Plateau through its NE margin. In addition, we review the previously published data on the Yellow River terraces and ancient large lakes in the basins. Based on our new data and previous researches, we conclude that the modern Yellow River, with headwaters in the Tibet Plateau and debouching in the Bohai Sea, should date from at least 1.2 Ma. Ancient large lakes (such as the Hetao and Sanmen Lakes) developed as exorheic systems and flowed through the modern Yellow River at that time.
Highlights
IntroductionPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations
Two terrace series were mapped at the Niangoucun section (NGC) and Beichengcun section (BCC), respectively (Figure 3)
Terrace T1 is a fill terrace at 2–8 m above the modern Yellow River
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The evolution of the Yellow River system is influenced by tectonic movements, climatic change, and human activity [1,2]. The uplift of the Tibet Plateau reinforces the strength of the Asian Monsoon and plays an important role in global climate change [3]. Rapid erosion may lead to a crust isostatic rebound and cause tectonic activity [4]
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have