雪峰隆起带金矿成因新析  

The genesis of gold deposits in Xuefeng uplift zone

作　　者：曾钦旺 刘云华 钱滔 宁钧陶[4] 王海元 黄宝亮[4] 赵春和 王谦[7] ZENG Qinwang;LIU Yunhua;QIAN Tao;NING Juntao;WANG Haiyuan;HUANG Baoliang;ZHAO Chunhe;WANG Qian(Hunan Bureau of Geology and Mineral Exploration and Development,Changsha 410011,Hunan,China;Inner Mongolia Jincai Industrial Group Co.,Ltd.,Hohhot 010000,Inner Mongolia,China;No.304 Geological Party,Hunan Bureau of Nuclear Geology,Changsha 410012,Hunan,China;No.402 Geological Party,Hunan Bureau of Geology and Mineral Exploration and Development,Changsha 410014,Hunan,China;Xi'an Huadi Mining Management Co.,Ltd.,Xi'an 710000,Shaanxi,China;The First Institute of Geology and Mineral Resources Survey,Henan Bureau of Geology and Mineral Exploration and Development,Luoyang 471023,Henan,China;Hunan Institute of Land and Resources Planning,Changsha 410007,Hunan,China)

机构地区：[1]湖南省地质矿产勘查开发局,湖南长沙410011 [2]内蒙古金彩实业集团有限公司,内蒙古呼和浩特010000 [3]湖南省核工业地质局304大队,湖南长沙410012 [4]湖南省地质矿产勘查开发局402队,湖南长沙410014 [5]西安华地矿业管理有限公司,陕西西安710000 [6]河南省地质矿产勘查开发局第一地质矿产调查院,河南洛阳471023 [7]湖南省国土资源规划院,湖南长沙410007

出　　处：《中国地质》2020年第4期914-931,共18页Geology in China

基　　金：中国地质调查局整装勘查区找矿预测与技术应用示范项目(121201004000172201-23);湖南省2017年度财政出资地质勘查项目(20170327)联合资助。

摘　　要：本文以地球科学基础学科的基本知识和矿床实例首次论述了雪峰隆起带内板岩、变质砂岩等浅变质的区域变质作用不能使岩石中的金活化迁移富集成矿;断裂构造在动力变质过程中本身并不成矿,断裂破碎带的地层中金只是带内金矿体金金属量的0.123%;流体包裹体测定的金矿成矿温度主要区间在200~300℃,说明雪峰隆起带岩金矿床不是地下水热液成因;金矿床的一些矿石矿物、伴共生组分、微量元素、同位素地球化学等特征与花岗岩类岩浆岩的相似性也说明了两者间的成因关系;重磁资料推断地表无岩浆岩出露的岩金矿床下部有大面积的隐伏岩体。以上论述和排除法均说明雪峰隆起带上岩金矿床成因类型是岩浆热液矿床。Based on basic knowledge in geosciences and instances of ore deposits, the authors firstly put forward the argument that gold within rocks in the Xuefeng uplift zone can’t be mobilized, migrated and enriched for mineralization by low-grade regional metamorphism of such rocks as slate and meta-sandstone. The fault structure itself cannot be mineralized in the process of dynamic metamorphism. The content of gold in strata in the fracture zone is only 0.123% of that in the orebody. The metallogenic temperature of the gold deposit determined by fluid inclusions mainly ranges from 200℃ to 300℃, which indicates that the rock gold deposit in the Xuefeng uplift zone was not sourced from underground hydrothermal solutions. The similarity between some ore minerals, associated components, trace elements, and isotopic geochemistry of gold deposits and the similarity of granitic magmatic rocks show their genetic relationships. The gravitational and magnetic data suggest that there might exist a large concealed intrusion under the gold deposit where there are no magmatic rocks exposed on the surface. The above discussion and exclusion suggest that the genetic type of rock gold deposits in Xuefeng uplift belt is magmatic hydrothermal deposit.

关 键 词：雪峰隆起带 金矿成因 隐伏岩体 岩浆热液矿床 矿产勘查工程 湖南 

分 类 号：P618.51[天文地球—矿床学]