基于流域盆地剥蚀速率分析和瞬时河流地貌演化模拟方法重建北天山西段科古琴山晚新生代的构造抬升历史

天山造山带是中亚地区最活跃的陆内造山带，其腹地的地壳增厚速率远高于剥蚀速率，也是一个非均衡状态的生长地貌，重建天山山脉晚新生代地貌生长过程对于深入理解其新生代陆内造山过程具有非常重要的意义。科古琴山位于天山山脉西北段，该地区发育了一系列与山脉构造抬升相关的瞬时河流地貌，陆内造山前的古夷平面已被抬升至海拔约2000m的高度，是研究天山山脉新生代地貌生长过程天然实验室。本研究从山脉构造抬升与地表剥蚀过程相互作用的角度出发，计划分析科古琴山地区不同构造位置和不同地貌单元的流域盆地的剥蚀速率，结合瞬时河流地貌演化模拟方法，定量重建该山脉新生代地貌生长过程和构造抬升历史，并结合前人已有的研究数据更深刻的理解天山山脉的陆内造山过程。

The Tian Shan orogen is the most active intra-continental orogenic belt in Central Asia. The present crustal thickening rate is significantly higher than the erosion rate in the inner Tian Shan mountain range, suggesting that the topography of the mountain range is growing in non-steady state. Thus, reconstruction of the Late Cenozoic geomorphologic growth history is crucial to understanding the intra-continental uplift history of the Tian Shan mountain range. .The Keguqinshan, forming the northwestern branch of the Tian Shan mountain range, is characterized by transient fluvial landscapes, which are caused by regional uplift. The peneplanation surfaces, which were developed before the Cenozoic intra-continental deformation, were uplifted to an elevation of ~2000 m. This mountain is a natural laboratory to understand the Cenozoic geomorphologic growth of the Tian Shan mountain range. In this study, we shall mainly focus on the interaction between mountain uplift and earth surface erosion processes in the Keguqinshan. By investigating the erosion rates of the catchment basins in different locations of transient landscapes along the Keguqinshan and modelling of these transient landscapes, this project will quantitively reconstruct the Cenozoic geomorphologic growth processes and uplift history of this mountain. Comparing with the previously published data, it will offer new insights into understanding the intra-continental mountain building process of the Tian Shan mountain range.