西藏多龙矿集区拿若铜(金)矿床蚀变特征  

Alteration of Naruo Porphyry Cu(Au) Deposit in the Duolong Ore-concentration Area,Tibet

作　　者：高轲[1] 多吉[1,2] 唐菊兴[3] 张志[4] 宋俊龙[1] 丁帅[1] 宋扬[3] 林彬[3] 冯军 

机构地区：[1]成都理工大学地球科学学院,成都610059 [2]西藏地质矿产勘查开发局,拉萨650000 [3]中国地质科学院矿产资源研究所,北京100037 [4]中国地质调查局成都地质矿产研究所,成都610082 [5]西藏金龙矿业股份有限公司,拉萨850000

出　　处：《矿物岩石地球化学通报》2016年第6期1226-1237,共12页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学青年基金(41402178);国土资源部公益性行业科研专项项目(201511017;201511022-02);中国地质科学院基本科研业务费(YYWF201608)

摘　　要：为探讨西藏多龙矿集区拿若铜(金)矿床的蚀变分带特征,从而建立该矿床的蚀变分带模型,为勘查工作提供指导,在野外资料整理的基础上,结合室内镜下鉴定,对矿床蚀变及分带特征进行了详细研究。结果表明,矿区发育较典型的斑岩热液蚀变系统,分带性较为明显,从斑岩体内向外依次为:钾硅酸盐化(叠加青磐岩化)→绢云母化(叠加青磐岩化)→青磐岩化→角岩化的分带特征,与矿化有关的蚀变主要为钾硅酸盐化和绢云母化。The Naruo Cu（Au）deposit is a large porphyry deposit in Bangonghu-Nujiang suture,and it is an important part of Duolong ore-concentration area.In this study,alteration and mineralization zoning were constrained by detailed field in-vestigation and indoor petrography observation in order to characterize the alteration and establish alteration-zoning model for exploration.The deposit has typical porphyry hydrothermal alteration system with successively alteration zoning of potas-sium silicate zone（with later propylitization）to sericite zone（with later propylitization）,propylitic zone,and hornfel zone from inner outward.The mineralization is closely related to potassium silicification and sericitization.

关 键 词：斑岩铜(金)矿 蚀变分带 拿若 西藏 

分 类 号：P618.41[天文地球—矿床学] P618.51[天文地球—地质学]