多光谱遥感在铬铁矿找矿中的应用--以雅江缝合带西段东波超镁铁岩体为例  

Application of Multi-spectral Remote Sensing in Chromite Prospecting--A Case Study From Dongbo Ultramafic Massif in the Western Part of the Yarlung Zangbo Suture Zone

作　　者：高丽萍 Gao Liping(Tibet University College of Engineering,Lhasa 850000,China)

机构地区：[1]西藏大学工学院,西藏拉萨850000

出　　处：《科学技术创新》2022年第15期26-29,共4页Scientific and Technological Innovation

基　　金：西藏大学研究生“高水平人才培养计划”:多光谱遥感在铬铁矿找矿中的应用--以雅江缝合带西段东波超镁铁岩体为例(2019-GSP-S061)。

摘　　要：为研究多光谱遥感技术在铬铁矿找矿中的应用,文章以雅鲁藏布江缝合带西段东波超镁铁岩体为例,使用Landsat OLI卫星影像数据,结合遥感技术进行羟基、铁染矿化蚀变信息提取,以及根据已有的地物波谱曲线,利用光谱角分类(spectral angle mapping,SAM)进行纯橄岩和橄榄岩岩性信息提取,成功提取出研究区域羟基异常信息和橄榄岩岩性信息,与产有大型铬铁矿矿床的罗布莎岩体相比,其岩石学特征相似,有极大的找矿前景。In order to study the application of multispectral remote sensing technology in chromite prospecting,this paper takes the Dongbo ultramafic massif in the western part of the Yarlung Zangbo suture zone as an example,uses remote sensing technology to extract the hydroxyl alteration and iron-stain alteration information.Based on Landsat OLI satellite image data and existing spectral curves of features,the lithological information of dunite and peridotites was extracted by spectral angle mapping(SAM).The experiment successfully extracted the hydroxyl anomaly information and peridotite lithology information in the study area.The study area has similar petrological features to the Luobusa peridotite massif which contains numerous podiform chromitites,so it has great prospecting prospects.

关 键 词：铬铁矿 蚀变异常 光谱角分类 东波岩体 

分 类 号：P627[天文地球—地质矿产勘探] P618.3[天文地球—地质学]