西藏巨龙超大型斑岩型铜矿床地质特征及找矿前景  

Geological Characteristics and Prospecting Prediction of Julong Supergiant Porphyry Copper Deposit,Tibet

作　　者：康旭 谢富伟 丁帅 龚建生 樊炳良 周敖日格勒 孙杨 何逸飞 贾敏 徐煜昕 邱泽航 曹润 刘诗语 张家璇 KANG Xu;XIE Fuwei;DING Shuai;GONG Jiansheng;FAN Bingliang;ZHOUAORI Gele;SUN Yang;HE Yifei;JIA Min;XU Yuxin;QIU Zehang;CAO Run;LIU Shiyu;ZHANG Jiaxuan(Zijin Mining Group Southwest Geological Exploration Co.,Ltd.,Chengdu 610059,China;College of Earth and Planetary Sciences,Chengdu University of Technology,Chengdu 610059,China;Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;MNR Key Laboratory of Metallogeny and Mineral Assessment,Beijing 100037,China)

机构地区：[1]紫金矿业集团西南地质勘查有限公司,四川成都610059 [2]成都理工大学地球与行星科学学院,四川成都610059 [3]中国地质科学院矿产资源研究所,北京100037 [4]自然资源部成矿作用与资源评价重点实验室,北京100037

出　　处：《金属矿山》2025年第1期168-176,共9页Metal Mine

基　　金：“十四五”国家重点研发计划项目(编号:2022YFC2905005);四川省自然科学基金项目(编号:2023NSFSC0798,2025ZNSFSC1197)。

摘　　要：巨龙铜矿床位于拉达克—冈底斯—下察隅岩浆弧东段南缘,是我国首个单体铜金属资源量超过2000万t的世界级斑岩型铜矿床。最新勘查成果显示巨龙铜矿是由驱龙铜矿和荣木错拉铜矿组成的一个完整斑岩成矿系统。结合矿区2020年以来的补充勘探成果,开展了巨龙铜矿矿床地质特征研究,建立了三维地质模型和矿体模型,总结和探讨了矿床成因,分析了矿区找矿前景。研究结果表明:巨龙铜矿发育于近EW向逆冲断裂带与SN向正断层系统交汇部位的中新世复式岩体中,主要赋矿岩体为二长花岗斑岩、黑云母二长花岗岩、花岗斑岩;矿体在平面上呈近似圆形,空间上呈厚大柱状体,产状近直立,铜品位由浅部向深部逐渐降低;围岩蚀变以发育大量硬石膏、泥化蚀变叠加显著为特征;巨龙铜矿是典型的碰撞型斑岩铜矿成矿系统,降温可能是铜发生大规模沉淀的主要因素。在上述分析基础上,以Leapfrog三维地质建模软件为平台,通过隐式建模方法构建了矿床三维地质模型和三维矿体模型,并结合矿床成因和找矿标志,认为巨龙铜矿体北侧及东侧深部未封闭,深部找矿潜力巨大。此外,该矿北西方向串珠状低磁异常区及北侧默龙玛矿段也具有良好的找矿前景,有望取得新的找矿突破。Julong Copper Deposit is located at the southern edge of the eastern section of Ladak-Gangdese-Xiachayu magma arc.It is the first world-class porphyry copper deposit with with copper metal resources of more than 20 million tons for a single orebody.The latest survey results show that Jurong Copper Deposit is a porphyry mineralization system composed of Qulong and Rongmucuola mining section.Combined with the supplementary exploration results of the mining area since 2020,the geological characteristics of Julong Copper Deposit are studied,three-dimensional geological model and orebody model are established,the genesis of the deposit is summarized and discussed,and the prospecting prospect of the mining area is analyzed.The results show that Julong Copper Deposit is developed in Miocene complex massif near the intersection of east-west thrust fault zone and north-south normal fault system.The primary ore-bearing rocks are monzonitic granite-porphyry,biotite monzogranite,and granite-porphyry.The orebody is approximately circular on the plane and has a thick cylindrical body in space,and the copper grade is gradually reduced from shallow to deep.The alterations are characterized by the development of a large amount of anhydrite and advanced argillic.Jurong Copper Deposit is a typical collision-type porphyry copper system,and the cooling may be the main factor for the large-scale precipitation of copper.Combined with the above analysis results,based on the platform of Leapfrog 3D geological modeling software,the depest 3D geological model and 3D orebody model are constructed by implicit modeling method.Based on the genesis of the deposit and prospecting indicators,it is proposed that the north and east sides of Julong Copper Deposit have enormous potential for deep mineral exploration.Additionally,it is noted that the northwest direction of the mine has a bead-like low magnetic anomaly zone,and the northern side of the Molongma ore segment both have good prospecting prospects.New breakthroughs in prospecting are expect

关 键 词：铜矿床 斑岩型 地质特征 Leapfrog三维地质建模 找矿前景 找矿突破 

分 类 号：P611[天文地球—矿床学] P612[天文地球—地质学]