基于ASTER数据的新疆若羌区蚀变矿物信息提取方法  

Extraction of altered mineral information from ASTER data in Ruoqiang area,Xinjiang

作　　者：王平平 张月阳 赵慧 姚虎 Wang Pingping;Zhang Yueyang;Zhao Hui;Yao Hu(Institute of Natural Resources Monitoring and Comprehensive Land Improvement of Henan Province,Zhengzhou 450016,Henan,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Yunnan Open University,Kunming 650000,Yunnan,China)

机构地区：[1]河南省自然资源监测和国土整治院,河南郑州450016 [2]昆明理工大学国土资源工程学院,云南昆明650093 [3]云南开放大学,云南昆明650000

出　　处：《地质学刊》2024年第3期273-278,共6页Journal of Geology

基　　金：云南省教育厅科学研究基金项目(2023J0800)。

摘　　要：采用主成分分析法,对新疆若羌地区的ASTER数据主成分特征向量矩阵进行分析,确定反映铁氧化物(褐铁矿、赤铁矿和针铁矿),含Al(OH)矿物(高岭石、明矾石、白云母、伊利石)以及含Fe,Mg(OH)矿物(绿泥石及碳酸盐类的方解石、白云石、菱铁矿)的主成分。利用上述主成分和蚀变矿物组合的吸收反射波谱特征,提取新疆坡北地区蚀变矿物信息。结合遥感地质解译图、红柳园组下亚组(C_(1)h^(a))含矿地层、与矿化相关的石英脉以及控制矿体分布的NE向断裂构造,预测成矿远景区,为新疆坡北地区遥感地质找矿提供基础资料。Principal component analysis(PCA)was employed to analyze the feature vector matrix of ASTER data in Ruoqiang area,Xinjiang,identifying principal components reflecting iron oxides(such as goethite,hematite,and magnetite),Al(OH)minerals(including kaolinite,alunite,muscovite,and illite),and Fe,Mg(OH)minerals(such as chlorite and carbonate minerals like calcite,dolomite,and siderite).The absorption and reflection spectral characteristics of determined principal components and altered mineral association were utilized to extract alteration mineral information in northern slope area of Xinjiang.Combined with remote sensing geological interpretation maps,ore-bearing strata of the lower subformation(C_(1)h^(a))of Hongliuyuan Formation,quartz veins associated with mineralization,and NE-trending fault structures controlling mineral distribution,prospective ore zones were predicted,providing fundamental data for remote sensing geological exploration in Pobei area of Xinjiang.

关 键 词：ASTER数据 主成分分析法 蚀变矿物信息提取 成矿远景区 新疆若羌 

分 类 号：P627[天文地球—地质矿产勘探] TP751.1[天文地球—地质学]