Research on terrace sequence and sedimentary age characteristics of the Bachu River in the southeastern Tibetan Plateau
The study on river terraces is an important method to understand the process of regional climate change and tectonic uplift.The Batang section of the Bachu River is located in the southeastern Tibetan Plateau,which belongs to the tributary river system of the Jinsha River and has terraces on both sides.Because of its unique geographical location,it provides a natural place to study the uplift of the Tibetan Plateau since the Quaternary,and it plays an important role in the inversion of the formation and evolution of the Jinsha River system in this area.Field investigation showed that there were four terraces in the Batang area,which are T1～T4 terraces.According to cosmogenic radionuclide dating and optically stimulated luminescence dating of the terrace deposits,the ages of terrace formation from T1 to T4 are 1.7±0.1 ka,2.3±0.21 ka,4.5±0.5 ka and 62.3±2 ka,respectively.The T4 terrace was mainly controlled by tectonics,the formation of the terrace T1～T3 and the accumulation of terrace sediments mainly related to climate change.The results provide the reference for the study of climate change and tectonic movement in the Batang area,support the study of the formation and evolution of the Jinsha River system in this area,and promote the study of the uplift process of the Tibetan Plateau since the Holocene.
River terraceSedimentary ageBachu RiverTibetan Plateau
万方数据
维普
