基于高分遥感数据的西藏荣勒地区控矿信息提取  

Study of ore control information in Rongle area of Tibet based on high resolution remote sensing data

作　　者：付丽华[1] 张策[1] FU Lihua;ZHANG Ce(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China)

机构地区：[1]核工业航测遥感中心,石家庄050002

出　　处：《国土资源遥感》2020年第1期98-105,共8页Remote Sensing for Land & Resources

基　　金：中国地质调查局项目“班公湖—怒江成矿带矿产资源遥感地质调查”(编号:1212011121299)资助。

摘　　要：高空间分辨率遥感(以下简称“高分遥感”)数据信息丰富,能较好地用于识别微观岩性、构造等控矿信息。为了开展高分遥感数据在海拔高、基岩裸露的西藏荣勒地区的控矿信息提取研究,首先利用World View-2高分遥感数据确定最佳波段组合,在此基础上,对该地区地层、岩性、岩体、构造、接触带等与铜多金属成矿密切相关的控矿信息进行解译;然后,利用ASTER数据,采用主成分分析法提取与矿化相关的铁染、铝羟基和镁羟基等遥感蚀变异常信息;最后,综合区域铜矿成矿规律,通过人机交互解译,构建了岩浆热液型铜矿控矿信息遥感找矿模式,圈定出5个找矿靶区并通过野外查证发现了较好的矿化线索,为推进当地找矿进程提供了基础资料和参考依据。研究结果表明,高分遥感数据可以满足我国西部高海拔环境恶劣地区的矿产资源勘查和资源评价需求,彰显了高分遥感快速、高效、可靠的应用优势。High-resolution remote sensing data have rich information and hence can be used to better identify micro-lithology,structure and other ore-controlling information.In order to study the extraction of ore-controlling information of high-resolution remote sensing data in Rongle area of Tibet where the elevation is high and the bedrock is exposed,the authors interpreted the ore-controlling information of strata,lithology,rock mass,structure,contact zone and other information closely related to copper polymetallic mineralization in this area on the basis of the best band combination determined by WorldView-2 high-resolution remote sensing data.Using ASTER data,the authors employed principal component analysis(PCA)to extract the mineralization-related remote sensing alteration information of iron stain,aluminum hydroxyl group and magnesium hydroxyl group.Based on comprehensive regional copper mineralization rules,the authors constructed a remote sensing prospecting model for ore-controlling information of magmatic hydrothermal copper deposits through human-computer interaction interpretation.Five prospecting targets were delineated and good mineralization clues were found through field investigation.The results provide basic information and reference basis for promoting local prospecting process.The results show that the high-resolution remote sensing data can meet the needs of mineral resources exploration and resource evaluation in the high-altitude environment hostile areas in Western China and highlight the fast,efficient and reliable application effect of high-resolution remote sensing.

关 键 词：高分遥感 控矿信息 找矿应用 荣勒地区 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]