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中文摘要：
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。
英文摘要：
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.
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