华南地震2023，Vol.43Issue(4)：8-16,9.DOI:10.13512/j.hndz.2023.04.02
隆林西南部线性影像条带的地貌特征、成因及其与右江断裂带的关系
Geomorphologic Characteristics and Genesis of Linear Image Belt in the Southwest of Longlin and Its Relationship with Youjiang Fault Zone
摘要
Abstract
In order to explore the genesis of a linear image belt in the southwest of Longlin,Guangxi,and analyze its tectonic relationship with Youjiang fault zone,the methods of satellite remote sensing,UAV tilt photogrammetry and field geological and geomorphological survey are used to carry out this work.In the sentinel satellite image,a clear NWW linear image belt appears between Nongsangtun and Longneitun,with a length of 5 km and an angle of 17°-20°with Dagucheng fault valley that controls the synchronous turning of the water system.The field investigation shows that the linear image passes over the southern slope of the Longnei fault valley,and it is shown as a southward-dipping reverse slope steep cliff.A normal fault dipping south-west can be seen in the direction of eastward extension of the cliff.Near the turning point of the Nongsang River in the west,there are normal faults inclined to NNE or NE on the linear image belt.With the support of UAV tilt photogrammetry technology,there are nickpoints on the longitudinal section of the river at the upstream reach of the turning point of the Nongsang River,with a drop of about 78 m.There are normal faults exposed in the upstream and downstream of the nickpoint reach.It is considered that the fault controlling the linear image belt is a normal fault(Nongsang-Longnei fault)trending NWW.This normal fault,the Dagucheng fault,which controls the synchronous left turning of the water system,and the Jiuzhou-Zetun section of the Youjiang fault zone constitute a left-lateral strike-slip Riedel shear system,which are respectively T-fracture,R-fracture and Y-main shear fracture in this shear system.This Riedel shear system has been active for a long time at least during the Himalayan period.关键词
右江断裂带/里德尔剪切/构造地貌/河流裂点/喜马拉雅期/无人机/倾斜摄影测量Key words
Youjiang fault zone/Riedel shear/Tectonic geomorphology/Knick point/Himalayan period/UAV/Tilt photogrammetry分类
天文与地球科学引用本文复制引用
张沛全,左天惠,邹衍,米远威,潘岳怡,钟德伟..隆林西南部线性影像条带的地貌特征、成因及其与右江断裂带的关系[J].华南地震,2023,43(4):8-16,9.基金项目
广西自然科学基金项目(2018GXNSFAA281323) （2018GXNSFAA281323）
