四川拉拉铜矿区ASTER和GF-5号卫星数据蚀变矿物弱信息提取  

Extraction of weak information of altered minerals in the Lala Copper Mine,Sichuan Province,China based on the ASTER and GF-5 satellite data

作　　者：马鑫 何叶 李金洲 张庚 张新乐 吴夏涛 周家喜 殷桂圆 MA Xin;HE Ye;LI Jinzhou;ZHANG Geng;ZHANG Xinle;WU Xiatao;ZHOU Jiaxi;YIN Guiyuan(Liangshan Mining Co.,Ltd.,Huili Sichuan 615146,China;Key Laboratory of Critical Minerals Metallogeny in Universities of Yunnan Province/Key Laboratory of Sanjiang Metallogeny and Resources Exploration&Utilization,MNR,School of Earth Sciences,Yunnan University,Kunming Yunnan 650500,China;Yunnan Institute of Geological Sciences,Kunming Yunnan 650011,China;Yunnan Copper Mineral Resources Exploration and Development Co.,Ltd.,Kunming Yunnan 650051,China)

机构地区：[1]凉山矿业股份有限公司,四川会理615146 [2]云南大学、地球科学学院、云南省高校关键矿产成矿学重点实验室/自然资源部三江成矿作用及资源勘查利用重点实验室,云南昆明650500 [3]云南省地质科学研究所,云南昆明650011 [4]云南铜业矿产资源勘查开发有限公司,云南昆明650051

出　　处：《矿物学报》2024年第6期898-910,共13页Acta Mineralogica Sinica

基　　金：云南铜业矿产资源勘查开发有限公司和云南大学科研合作项目(编号:202207YKSC03);云南省重大科技专项计划项目(编号:202402AB080006);云南大学科研启动项目(编号:YJRC4201804);云南大学关键金属成矿与找矿预测创新团队(2021-3);云南省教育厅关键金属成矿与找矿预测硕士生导师团队(2023-15)

摘　　要：四川拉拉铜矿是康滇铜矿带上的大型铜矿床之一,近年来找矿取得重要突破。为进一步扩大该矿区找矿空间,本研究采用ASTER多光谱和GF-5高光谱遥感数据,引入主成分分析法和光谱角制图法,精细化提取拉拉铜矿区碳酸盐矿物、铁氧化物/氢氧化物、钠长石、黑云母、绿泥石、角闪石、白云母和石英等蚀变矿物弱信息。结果表明,部分蚀变信息与拉拉、红泥坡、老羊汗滩、石龙等已知铜矿床(点)的吻合度较高。未知蚀变信息野外实地查证,有蚀变和/或矿化显示,是较好的找矿标志。研究结论表明,可重点对研究区中北部(红泥坡-上良村等地)和南部(海林村等地)蚀变矿物弱信息分布密集区开展下一步找矿勘查工作。可见,蚀变矿物遥感弱信息提取可为拉拉矿区勘查部署提供找矿线索,值得予以关注。The Lala Cu deposit in Sichuan Province is one of the large sized Cu deposits in the Kangdian Cu metallogenic belt.A significant breakthrough of mineral exploration in the area has been made in recent years.In order to further expand the exploration space in the area,in this study,based on the ASTER multispectral and GF-5 hyperspectral remote sensing data,by introducing the principal component analysis and spectral angle mapping methods,we have finely extracted weak information of altered minerals such as carbonate minerals,iron oxides/hydroxides,albite,biotite,chlorite,hornblende,muscovite,and quartz in the Lala deposit.The results indicate that some weak information anomalies of altered minerals are certainly coincident with known Cu deposits/mineral occurrences such as the Lala,Hongnipo,Laoyanghantan,and Shilong deposits.The field investigation of unknown weak information anomalies indicate that,there are signs of alteration and/or mineralization in those anomalies which are good indicators for mineral exploration.It is recommended that further mineral prospecting and exploration should be carried out in areas with densely distributed weak information anomalies in the central-northern(such as the Hongnipo-Shangliang village)and southern(such as the Hailin village)parts of the research area.It can be seen that the extracted weak information anomalies of altered minerals from the remote sensing data can provide prospecting clues for the deployment of mineral exploration in the Lala area,and they are worth for being paid attention to.

关 键 词：ASTER GF-5 PCA法 SAM法 蚀变弱信息提取 拉拉铜矿区 

分 类 号：P627[天文地球—地质矿产勘探]