蚀变矿物填图技术在斑岩型铜矿找矿勘查中的应用—以滇西北香格里拉松诺矿床为例  

Application of Alternation Mineral Mapping in Porphyry Copper Deposits:A Case Study of the Songnuo Deposit in the Shangrila Region,Northwest Yunnan

作　　者：杜斌 董涛 董红国 段召艳 曹晓民 兰文达 李冰 DU Bin;DONG Tao;DONG Hongguo;DUAN Zhaoyan;CAO Xiaomin;LAN Wenda;LI Bing(Yunnan Geological Survey,Kunming,Yunnan 650216;MNR Key Laboratory of Sanjiang Metallogeny and Resources Exploration&Utilization,Kunming,Yunnan 650051)

机构地区：[1]云南省地质调查院,云南昆明650216 [2]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650051

出　　处：《地质与勘探》2021年第4期879-894,共16页Geology and Exploration

基　　金：云南省自然资源厅项目(编号:4530000HT201902580);云南省地质勘查基金项目(编号:2016014)联合资助。

摘　　要：松诺铜矿区位于香格里拉格咱斑岩铜矿带红山-普朗铜多金属成矿亚带中段,矿区剥蚀程度较低,具有寻找斑岩型铜矿的潜力。本次蚀变矿物填图工作采用近红外光谱矿物分析技术,识别出绿泥石、绿帘石、高岭石、云母类、蒙脱石类及伊利石等6类主要蚀变矿物,蚀变类型为青磐岩化、绢英岩化;结合物探、化探异常分布,圈定3处找矿靶区,经对KHT2、KHT3钻孔验证,深部均圈定多层铜矿化体。结果表明,近红外光谱矿物分析技术在斑岩型铜多金属矿床勘查评价中可以较好地划分热液矿化蚀变带,进一步明确斑岩型矿化-蚀变中心,为探矿工程部署提供依据。The Songnuo copper mine area,Shangerila,northwest Yunnan,is located in the middle segment of the Hongshan-Pulang Cu polymetallic metallogenic sub-belt in the Geza porphyry belt.Its erosion is relatively low,possessing a potential of porphyry copper deposits.This work used the short wavelength infra-red(SWIR)technology to map alternation minerals in this area.As a result,six types of alteration minerals were recognized,which are chlorite,epidote,micas,kaolinite,illite and montmorillonite.The alteration is of propyliti zation and sericitization types.Combined with geophysical and geochemical anomalies,three prospecting target areas were delineated.Verified by boreholes KHT2 and KHT3,a multiple-layer mineralized body at depth was found.This work demonstrates that that the SWIR method can designate hydrothermal alteration zones in porphyry copper deposits,help further determine the mineralization center,and provide evidence for deployment of exploration.

关 键 词：蚀变矿物填图 斑岩型铜矿 找矿靶区 松诺铜矿区 香格里拉 滇西北 

分 类 号：P627[天文地球—地质矿产勘探]