吉林敦化松江河金矿地质、流体包裹体特征与成因研究  

Geology,fluid inclusion and genesis of Songjianghe gold deposit in Dunhua City,Jilin Province

作　　者：刘禹铭 孙景贵[1] 李雪梅[1] 松权衡[2] 王清海 张笑天[1,4] LIU Yu-ming;SUN Jing-gui;LI Xue-mei;SONG Quan-heng;WANG Qing-hai;ZHANG Xiao-tian(College of Earth Sciences,Jilin University,Changchun 130061,China;Institute of Geological Survey of Jilin Province,Changchun 130061,China;International Centre for Geoscience Research and Education in Northeast Asia,Jilin University,Changchun 130026,China;State Key Laboratory of Nuclear Resources and Environment,East China Institute of Technology,Nanchang 330013,Jiangxi,China)

机构地区：[1]吉林大学地球科学学院,长春130061 [2]吉林省地质调查院,长春130061 [3]吉林大学东北亚国际地学研究与教学中心,长春130026 [4]东华理工大学核资源与环境国家重点实验室,江西南昌330013

出　　处：《世界地质》2021年第2期273-287,共15页World Geology

基　　金：中国地质调查局项目(DD20190368);国家自然科学基金项目(41390444,41172027)联合资助。

摘　　要：松江河金矿床位于华北板块北缘东段与兴蒙造山带接壤的夹皮沟-海沟金成矿带中部,是近年来发现的产在韧性变形带内的一座中型金矿床。该矿床赋矿围岩组合为绿泥石英黑云片岩、角闪黑云石英片岩、绿泥绿帘阳起片岩和二云片岩等,为一套叠加有复合变质变形的绿片岩相、角闪岩相构造岩系。成矿过程经历了3个阶段:石英-黄铁矿阶段(Ⅰ)、石英-多金属硫化物阶段(Ⅱ)和石英-碳酸盐阶段(Ⅲ)。成矿流体为中温-低盐度的CO_(2)-H_(2)O-NaCl体系,成矿过程中流体的不混溶作用是导致成矿元素沉淀的主要机制。矿床成因类型属于中温热液蚀变岩型金矿床,成矿时代为晚侏罗世,处于古太平洋板块向欧亚板块俯冲挤压之后的伸展环境。Songjianghe gold deposit is located in the middle of Jiapigou-Haigou gold metallogenic belt,which is adjacent to the Xing-Meng orogenic belt and eastern part of the north margin of North China plate.It is a medium-sized gold deposit discovered in ductile deformation zone in recent years.The host rock assemblage of the deposit is composed of chlorite-quartz-biotite schist,hornblende-biotite-quartz schist,chlorite-epidote-actinolite schist and muscovite-biotite schist.It is a set of greenschist facies and amphibolite facies structural rock series superimposed with complex metamorphic deformation.The mineralization process of Songjianghe gold deposit consists of three phases:quartz-pyrite stage(Ⅰ),quartz-polymetallic sulfide stage(Ⅱ)and quartz-carbonate stage(Ⅲ).The ore-forming fluid is CO_(2)-H_(2)O-NaCl system with medium temperature and low salinity.The immiscibility of fluid is the main mechanism leading to the precipitation of ore-forming elements.The genetic type of the Songjianghe deposit belongs to mesothermal-hydrothermal alteration gold deposit.The mineralization age of the deposit is Late Jurassic,which is in the extensional environment after the subduction and compression of the paleo-pacific plate to the Eurasian plate.

关 键 词：流体包裹体 矿床成因 松江河金矿床 敦化 

分 类 号：P618.51[天文地球—矿床学]