摘要
Abstract
Tin as a strategic mineral resource,social demand continues to grow,the development of efficient and accurate prospecting technology is the key to enhance the ability to guarantee tin resources.In this paper,the tin poly-metallic deposits in the Ximeng area of Yunnan Province are taken as the research object,and the prediction model of mineral genesis information is constructed by combining remote sensing technology,geological data and geochemical information.Using Landsat-8 OLI,ASTER and Sentinel-2 multi-source remote sensing data,the characteristics of line-ring structure and altered mineral information were extracted.The results show that NW-trending and NE-trending faults and ring structures are the main types of ore-controlling structures.Altered minerals such as silicide,limonite and kaolinite are distributed along the trend,and are highly correlated with the spatial location of the ore body,providing key clues for prospecting.Based on multi-source remote sensing monitoring data,combined with 12 ore-controlling factors,the weights are determined by analytic hierarchy process and evidence weighting method.The prediction accuracy of the established evidence weighted information model is 71%.Finally,9 metallogenic potential areas are delineated,type A metallogenic area has greater mineral potential.关键词
线-环构造/蚀变异常/成矿信息量模型/栅格单元/锡多金属矿Key words
line-ring structure/alteration anomaly/mineralization information model/grid unit/tin polymetallic ore分类
天文与地球科学
