文章摘要
王继斌.西藏尕尔勤铜金矿多光谱遥感蚀变分带矿物提取[J].地质与勘探,2018,54(2):358-365
西藏尕尔勤铜金矿多光谱遥感蚀变分带矿物提取
Discernment of alteration zoning minerals using multispectral remote sensing data in the Ga’erqin porphyry Cu-Au deposit, Tibet
投稿时间:2017-02-23  修订日期:2017-06-15
DOI:10.12134/j.dzykt.2018.02.014
中文关键词: 蚀变分带 斑岩铜金矿 多光谱 MTMF 尕尔勤 西藏
英文关键词: alteration zones, porphyry copper deposits, multispectral, MTMF, Ga’erqin,Tibet
基金项目:中国地质调查局项目(DD20160015-26)、国家自然科学基金(编号:41202233)和国土资源部公益性行业科研专项(编号:201511017)联合资助
作者单位E-mail
王继斌 成都理工大学地球科学学院四川成都 成都理工大学工程技术学院四川乐山 地学空间信息技术国土资源部重点实验室四川成都 zhangtb@cdut.edu.cn 
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中文摘要:
      针对西藏多龙矿集区尕尔勤铜金矿床多光谱遥感蚀变分带矿物提取问题,在分析该区典型矿物波谱曲线的基础上,基于ASTER和L8_OLI多光谱数据采用MTMF和主成分分析方法对研究区蚀变分带矿物信息进行了提取。结果表明;(1)用MTMF方法可将Al-OH矿物细分为白云母和白云母+高岭石/蒙脱石;(2)尕尔勤铜金矿多光谱遥感地表蚀变分带矿物(组合)由内而外为:白云母→白云母+高岭石/蒙脱石→绿帘石,分别对应于斑岩型铜金矿的绢英岩化带→绢英岩化+泥化带→青磐岩化带。多光谱遥感地表蚀变分带特征对该区斑岩型铜金矿地面勘查和部署工作提供了重要的遥感线索。
英文摘要:
      This work focuses on discernment of the alteration zoning minerals in the Ga’erqin porphyry Cu-Au deposit in the of Duolong ore-concentrating area, Tibet. Based on the analysis of the spectra curves of typical minerals, the information on alteration zoning minerals is extracted using MTMF and principal component methods from ASTER and L8_OLI multispectral data. The results show that the Al-OH group minerals can be divided into muscovite and muscovite + kaolinite/montmorillonite detailedly using the MTMF method. There are three alteration minerals from the interior to the exterior of the Ga’erqin porphyry Cu-Au deposit: muscovite→muscovite + kaolinite/montmorillonite→epidote, which correspond to the phyllic, phyllic + argillic and propylitic alteration zones, respectively. The characteristics of multispectral remote sensing surface alteration zones provide important clues for the field survey of porphyry copper deposits in this area.
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