王俊, 李家存, 杨振宇.青海玉树巴塘乡地区地貌特征与构造运动相关性分析[J].河南理工大学学报（自然科学版）,2023,42(3):59-68.

WANG J, LI J C, YANG Z Y.Correlation analysis between geomorphic features and tectonic active in Batangxiang Area，Yushu，Qinghai[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(3):59-68.

青海玉树巴塘乡地区地貌特征与构造运动相关性分析

王俊, 李家存, 杨振宇

首都师范大学 资源环境与旅游学院，北京 100048

摘要:针对目前巴塘乡断裂垂向上运动性质尚无统一定论问题，基于12.5 m分辨率的ALOS DEM，通过改进的Chi⁃z法计算巴塘乡地区河流陡峭指数并识别裂点，利用地貌指数对玉树巴塘乡地区进行构造地貌定量化分析。结果表明：（1）巴塘乡盆地河流陡峭指数明显小于其南侧山地的；（2）构造活动是研究区内河流陡峭指数分布差异的控制因素，同时也是裂点成因之一；（3）巴塘乡断裂是一条具有正倾滑分量的全新世左旋走滑断裂，羌塘块体在青藏高原内部物质向东挤出过程中发生了顺时针旋转，具有向南的运动分量，形成了兼具正倾滑分量的巴塘乡左旋走滑断裂，并在断裂控制下形成了巴塘乡断陷盆地和地貌侵蚀的差异性分布。

关键词:巴塘乡断裂;构造地貌;河流陡峭指数;面积-坡度; Chi⁃z

doi:10.16186/j.cnki.1673-9787.2021040013

基金项目:国家自然科学基金资助项目（91855216）

收稿日期:2021/04/03

修回日期:2021/06/11

出版日期:2023/05/25

Correlation analysis between geomorphic features and tectonic active in Batangxiang Area，Yushu，Qinghai

WANG Jun, LI Jiacun, YANG Zhenyu

College of Resource Environment and Tourism，Capital Normal University，Beijing 100048，China

Abstract:In view of there is no unified conclusion on the movement properties of the Batangxiang fault in the vertical direction，based on the 12.5 m resolution ALOS DEM，the river steepness index was calculated and the knick points were identified.The tectonic geomorphology of Batangxiang in Yushu was quantified by the improved Chi-z method.The results showed that：（1）The river steepness index of Batangxiang basin was significantly smaller than that of the southern mountains；（2）The tectonic activity was the controlling factor for the difference in river steepness index distribution in the study area，and was also one of the causes of the knick points；（3）The Batangxiang fault was a Holocene left-lateral strike-slip fault with positive dip slip component.Due to the clockwise rotation of Qiangtang block in the process of material extrusion to the east in the Qinghai-Tibet Plateau，it had the motion component to the south，and formed the Batangxiang left-lateral strike-slip fault with positive dip slip component，which controlled and formed the Batangxiang graben basin and different distribution of the geomorphic erosion.

Key words:Batangxiang fault;tectonic geomorphology;river steepness index;area-slope; Chi⁃z

青海玉树巴塘乡地区地貌特征与构造运动相关性分析_王俊.pdf