Evaluation of the Relative Tectonic Activity from the Faults in the Gengma-Lancang-Menghai Seismic Belt(Southwestern China)  

作　　者：Dan Wang Youpu Dong Zhipeng Xi Dongyue Zhang Jiaxin Duan Huayu Yu Liang Yu 

机构地区：[1]Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China

出　　处：《Journal of Earth Science》2024年第1期131-143,共13页地球科学学刊（英文版）

基　　金：financed by the ore-forming regularity and ore reserve increase of Sn-W mineralization of multiple types and stages in the Gejiu-Malipo ore-concentration area,SE Yunnan,SW China(No.202202AG050006);the National Natural Science Foundation of China(Nos.41802215 and 41762017);Kunming University of Science and Technology Extracurricular Academic Science and Technology Innovation Fund(No.2020YA010)。

摘　　要：The Gengma-Lancang-Menghai seismic belt,the southernmost part of the North-South seismic belt,is controlled by four active faults:the Nantinghe fault(NTHF),the Sanjianshan fault(SJSF),the Hanmuba-Lancang fault(HMB-LCF),and the Heihe fault(HHF),from northwest to southeast.However,the tectonic activity of the faults in the Gengma-Lancang-Menghai seismic belt has not been fully studied yet.In the present work,we conducted tectonic geomorphic indices to analyze the relative tectonic activity along the faults in the seismic belt based on the digital elevation model.We interpreted asymmetric factor,index of drainage basin shape,hypsometric integral,normalized streamlength gradient,valley floor-to-width to height ratio,and longitudinal profiles to show that the relative tectonic activity is higher in the north and lower in the south,and is strong in the region from Shanjia to Huimin in the center of the seismic belt.

关 键 词：Gengma-Lancang-Menghai seismic belt southeastern Tibetan Plateau geomorphic indices longitudinal profile 

分 类 号：P315[天文地球—地震学] P542[天文地球—固体地球物理学]