基于DEM数据的云南省宁洱县夷平面提取及其分布特征  

Extraction and Distribution Characteristics of Planation Surface in Ning′er County of Yunnan Province Based on DEM Data

作　　者：金文正[1,2] JIN Wen-zheng(China University of Geosciences,Beijing 100083,China;Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism,Ministry of Education,Beijing 100083,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处：《河北地质大学学报》2023年第6期35-40,共6页Journal of Hebei Geo University

基　　金：云南省科技计划项目(202302AF080001);国家自然科学基金项目(41002072)。

摘　　要：云南省宁洱县位于哀牢山断裂带以西地区,具有强烈的新构造运动表现,为分析该县内新构造运动的差异性构造表现特征,本文借助于ArcGIS软件对DEM数据体进行了不同地貌因子及各级夷平面的提取及分析,结果表明:该县地表总体表现为海拔较高(高程介于1000~3500 m之间,属中海拔地区)、坡度陡(陡坡区和斜坡区共占比91.89%)、地势起伏大(小起伏山地和中起伏山地共占比93.22%)等特征;发育四级不同的夷平面,海拔分别为1220 m、1355 m、1626 m、1707 m。各级夷平面的平面展布特征受构造变形影响明显,大型断裂周缘地区构造变形强烈,断裂发育,夷平面分布较少;断裂发育较少的地区,构造变形以垂向构造隆升为主,夷平面发育。Ning′er County of Yunnan Province,which is located in the west of Ailaoshan fault,has intense neotectonics movement.To analyze the differential tectonic characteristics of neotectonics in this county,the author uses ArcGIS software to extract and analyze different geomorphic factors of the DEM data and thus obtain four levels of planation surface.The results show that the surface of this county is high elevation(the elevation is between 1000~3500 m,belongs to a medium altitude),with its slope steep(steep and sloping areas account for a total of 91.89%)and its topography undulating greatly(small and medium undulating mountainous areas jointly account for 93.22%).There developed four different planation surfaces with elevations of 1220 m,1355 m,1626 m and 1707 m respectively in this county.The plane distribution characteristics of all levels of planation surface are affected by the tectonic deformation obviously.There developed more faults and less planation surface surrounding large faults,where have strong tectonic deformation.However,there developed more planation surface in those areas which has less faults and vertical structural uplift.

关 键 词：海拔 地貌 夷平面 新构造运动 宁洱县 云南省 

分 类 号：P542[天文地球—构造地质学]