近红外光谱矿物分析技术在帕南铜-钼-钨矿区蚀变矿物填图中的应用  

Application of Short Wave Infrared Spectrum Mineral Analyzer (BJKF-1) to Alteration Mineral Mapping at Panan,Tibet

作　　者：徐庆生[1] 郭健[1] 刘阳[1] 黄树峰[2] 李秋平[2] 陈玉水[2] 

机构地区：[1]中国冶金地质总局矿产资源研究院,北京100025 [2]中国冶金地质总局第二地质勘查院,福建莆田351111

出　　处：《地质与勘探》2011年第1期107-112,共6页Geology and Exploration

摘　　要：帕南矿区位于西藏冈底斯成矿带东段泽当矿田,具有形成中-大型斑岩型铜钼钨矿床的有利地质条件。使用近红外光谱矿物分析技术在帕南矿区北部进行了蚀变矿物填图,地表主要蚀变类型为青磐岩化及绢英岩化,有小范围泥化现象,未见高级泥化和钾化蚀变。根据蚀变矿物填图结果,结合物探、化探异常分布,推断在平面上主要成矿中心位于本次测区南西部,靠近雅鲁藏布江缝合带一侧,建议在较强绢英岩化蚀变部位实施钻孔进行验证。在所填出的绢英岩化带南西部施工钻孔PZK701,发现多层铜-钼矿化。在帕南矿区的工作结果表明,使用近红外光谱矿物分析技术可以快速进行蚀变矿物填图,获得测区蚀变矿物的种类、含量、组合和分布信息,有效圈定热液矿化蚀变带,解释并找出指向斑岩型矿化-蚀变中心的指示标志,判断矿化中心,为勘探工程部署提供更充分的地质依据。The Panan Cu-Mo-W deposit is located in the Zedang ore field on the eastern section of the Gangdese metallogenic belt in Tibet.It has favourable geological conditions for hosting large-scale porphyry and skarn Cu-Mo-W mineralization.The short wave infrared spectrum mineral analyser（BJKF-1）,made by the Nanjing Zhongdi Instruments Company Ltd,was applied to undertake the alteration mineral mapping at the Panan.Phyllic and propylitic alteration are identified at the surface,with locally developed argillic alteration which is clearly structurally controlled and is supergene.Based on the alteration zoning and the geochemical data,it is interpreted that the south-western part of the mapping area is very likely to be the centre of the porphyry mineralization.Drilling is recommended to test the centre of the phyllic alteration,and drill hole PZK701 intersected four mineralization zones.

关 键 词：蚀变矿物填图 绢英岩化/青磐岩化/钾化/高级泥化/泥化 斑岩型铜-钼矿 帕南矿区 

分 类 号：P618.65[天文地球—矿床学] P612[天文地球—地质学]