西藏地堡那木岗斑岩型铜矿多光谱遥感蚀变矿物组合分带特征  

Multispectral Remote Sensing Alteration Mineral Group Zoning haracteristics of Dibaonamugang Porphyry Copper Deposits,Tibetan Plateau

作　　者：孙姣姣[1] 张廷斌[1,2,3] 易桂花[1] 钟康惠[1] 余添添 别小娟[1] 尤俊峰 荣欣 王俊华 SUN Jiaojiao;ZHANG Tingbin;YI Guihua;ZHONG Kanghui;YU Tiantian;BIE Xiaojuan;YOU Junfeng;RONG Xin;WANG Junhua(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;The Engineering&Technical College of Chengdu University of Technology, Leshan 614007,Sichuan,China;Key Laboratory of Geoscience Spatial Information Technology,Ministry of Land and Resources of the P R China,Chengdu 610059,China;Faculty of Information Engineering,China University of Geosciences(Wuhan),Wuhan 430076,Chin;Panxi Geological Party,Sichuan Bureau of Geology and Mineral Exploration, Xichang 615000,Sichuan,China;College of Tourism and Urban-Rural Planning,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]成都理工大学工程技术学院,四川乐山614007 [3]地学空间信息技术国土资源部重点实验室,成都610059 [4]中国地质大学(武汉)信息工程学院,武汉430076 [5]四川省地矿局攀西地质大队,四川西昌615000 [6]成都理工大学旅游与城乡规划学院,成都610059

出　　处：《地质找矿论丛》2018年第3期466-473,共8页Contributions to Geology and Mineral Resources Research

基　　金：国家自然科学基金项目"西藏典型斑岩型铜矿床遥感蚀变信息重现性机理研究"(编号:41202233);国土资源部公益性行业科研专项项目"斑岩-浅成低温热液成矿系统研究及勘查评价示范--以西藏多龙整装勘查区为例"(编号:201511017);中国地质调查局工作项目"西藏物玛-先遣地区斑岩型铜金矿成矿规律研究与找矿靶区优选"(编号:12120113095300)联合资助

摘　　要：文章基于ASTER和Landsat-8OLI两种多光谱遥感数据,采用高光谱遥感技术混合调谐滤波(MTMF)、多光谱遥感技术相对吸收深度(RBD)、波段比值(BR)等方法提取了西藏多龙矿集区地堡那木岗斑岩型铜金矿床地表的蚀变矿物组合。其结果表明,基于ASTER数据的MTMF技术可将Al—OH矿物划分为白云母+高岭石/蒙脱石和地开石+蒙脱石+累托石两种组合,进一步可细分出斑岩型矿床多光谱遥感地表蚀变矿物组合并呈现出良好的分带特征:地堡那木岗铜金矿床自内而外依次为白云母+高岭石/蒙脱石→地开石+蒙脱石+累托石→Mg—OH类矿物组合,分别对应于前人野外调查所勘测到的的绢英岩化带+泥化带→泥化带→青磐岩化带,Fe3+矿物叠加于绢英岩化带、泥化带及其两带的叠合部位。所提取的多光谱遥感蚀变矿物组合分带特征对该区斑岩型铜金矿床的勘查工作提供了重要的遥感线索,对定位找矿靶区具有指导意义。The alteration mineral groups at surface in Dibaonamugang porphyry copper gold deposit are extracted from Advanced Spaceborne Thermal Emission and Reflection Radiometer(ASTER)and Landsat-8 Operational Land Imager(OLI)data by using the Mixture Tuned Marched Filtering(MTMF)technique of hyperspectral remote sensing,Relative Band Depth(RBD)and Band Ratio(BR)techniques.ASTER data processed by MTMF technique can divide the Al-OH minerals into two mineral groups:the muscovite+kaolinite/montmorillonite and the dickite+montmorillonite+rectorite.Through sub-division of the two can be recognized surface alteration mineral zoning of porphyry ore deposit.For examle of Dibaonamugang Cu-Au deposit the zoning is from interior to the exterior muscovite+kaolinite/montmorillonite,dickite+montmorillonite+rectorite and Mg-OH corresponding to the previously defined phyllic zone+argillic zone,the argillic zone and the propylitic zone respectively.The ferric iron minerals overprinted on the phyllic zone,the argillic zone and the overlapping part of these two zones.The zoning characteristics of the alteration mineral groups from multispectral remote sensing provide an important information to the further prospecting work of the porphyry copper deposit in this area.

关 键 词：斑岩型铜矿 蚀变矿物组合 MTMF 多光谱遥感 找矿预测 西藏 

分 类 号：P627[天文地球—地质矿产勘探]