新疆红山铜金矿床基于地面高光谱遥感找矿模型构建  

Prospecting Model Based on Ground Hyperspectral Remote Sensing Data of Hongshan Cu-Au Ore Deposit in Xinjiang

作　　者：王瑞军[1] 李名松[1] 汪冰[1] 牛海威 孙永彬[1] 李存金[1] 

机构地区：[1]核工业航测遥感中心,河北石家庄050002

出　　处：《现代地质》2016年第3期577-586,共10页Geoscience

基　　金：中国地质调查局项目"新疆重点地区航空高光谱调查与找矿预测技术研究"(12120114036501)

摘　　要：选择新疆红山铜金矿床,使用美国ASD公司的FieldSpec Pro FR地面波谱仪,在铜金矿区及外围地段分别对各地质体的英安岩、蚀变英安岩、花岗岩、花岗闪长岩、流纹斑岩、片理化带、矿体等开展地面波谱测试,获取各地质体的波谱曲线,综合剖析各吸收峰的波谱特征和蚀变矿物的反映特征,同时结合镜下鉴定和X射线衍射分析结果,研究和总结红山铜金矿区从矿体、矿化体、近矿围岩、外围蚀变围岩至外围正常围岩的地面高光谱蚀变矿物和蚀变矿物组合分布特征,结合矿床的地质矿产特征和地面围岩蚀变特征,形成地面高光谱蚀变矿物组合分布图,构建红山铜金矿床基于地面高光谱遥感找矿模型,为后期开展航空高光谱遥感调查、高光谱蚀变矿物信息提取和找矿预测提供地面高光谱波谱数据支持和典型矿床模型基础。Using FieldSpec Pro FR ground spectroscopy of American ASD Company, the authors carried out ground spectrum measurement for different geological bodies such as dacite,altered dacite,granite,granodiorite,rhyolite porphyry, schistosity belt and ore body respectively in the Hongshan Cu-Au deposit.The spectrum curves of geological bodies were achieved; and then the characteristics of absorption peak of spectrum and altered minerals were generally analyzed. According to the analysis results of microscopic identification and X-ray diffraction, this paper summarized the hyperspectral distribution characteristics of altered minerals and the mineral assemblage which are distributed in ore body, mineralized body, wall rock near ore body, altered wall rock and non-altered wall rock in the Hongshan Cu ore deposit. Based on the characteristics of mineral geology and ground wall rock alteration, the hyperspectral map of altered mineral assemblage formed and the prospecting model based on ground hyperspectral remote sensing data were constructed. The research provides hyperspectral data and typical deposit model for the further aerial survey, information extraction of altered minerals, and prediction for ore deposits.

关 键 词：地面波谱测试 蚀变矿物 波谱特征 高光谱遥感找矿模型 红山铜金矿床 

分 类 号：P588[天文地球—岩石学]