基于GIS的西南三江矿点空间格局分析  

Analysis on spatial pattern of Sanjiang occurrences based on GIS

作　　者：陈娟[1] 何政委 赵银兵[2] CHEN Juan1 ,HE Zheng-wei ,ZHAO Yin-bing2(1. College of Earth Science, Chengdu University of Technology, Chengdu 610059; 2. Tourism and Urban-Rural Planning College, Chengdu University of Technology, Chengdu 61005)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]成都理工大学旅游与规划学院,成都610059

出　　处：《矿产勘查》2018年第1期142-147,共6页Mineral Exploration

基　　金：中国地质调查局地质调查项目(编号:12120113095400)资助

摘　　要：西南三江是我国重要的矿产资源储藏地,以矿床(点)数据为基础,采用最邻近点指数、局部自相关、核密度方法从不同空间尺度探索矿点空间格局。结果表明:总体上自北向南梯度递减,自西向东先增后减;点格局的最近邻指数为0.72,暗示矿点分布具有一定的聚集性;县域尺度,西起类乌齐县东至德格县呈高—低聚集,垂直方向上德格县至香格里拉县、德钦县至云龙县地区呈高—高聚集;核密度显示矿点多中心聚集在北部地区;受构造控制明显,以西北—东南近南北方向分布为主,与区域构造方向一致。该研究对矿产资源勘查、区域环境治理具有一定意义。Sanjiang region of southwestern China is an important storage of mineral resources. This paper uses the nearest neighbor index,local autocorrelation and kernel density methods on the basis of deposits（ occurrences） data to analyze the spatial pattern of theses occurrences in different spatial scales. The results indicate that the distribution of these occurrences has an obvious decreasing trend from north to south,and firstly increasing then decreasing from west to east. The nearest neighbor index of 0. 72 shows that the distribution of these occurrences has certain of aggregation. The distribution on county scale from Leiwuqi County in the west to Dege County in the east is HL clustered,vertical direction from Dege County to Xianggelila County、Deqin County to Yunlong County are HH clustered. Kernel density shows that the occurrences mainly gather in the north of the region with multiple centers. The distribution of them is obviously controlled by structure,of which is dominated by northwest-southeast and nearly south-north distribution,and is consistent with regional tectonic direction. The study has great significance to mineral resources exploration and environmental governance.

关 键 词：矿点 最邻近点指数 局部自相关 核密度 

分 类 号：P611[天文地球—矿床学]