地质与资源2025，Vol.34Issue(5)：550-561,594,13.DOI:10.13686/j.cnki.dzyzy.2025.05.003
辽东猫岭金矿床流体包裹体特征和成矿时代研究
Fluid inclusion characteristics and metallogenic age of Maoling gold deposit in eastern Liaoning Province
摘要
Abstract
The Maoling gold deposit,situated within the Jiao-Liao-Ji mobile belt of North China Craton,is hosted in Gaixian Formation of Liaohe Group.The deposit is characterized by large scale,low grade,and complex genesis,with ongoing debates surrounding the characteristics of its ore-forming fluids and metallogenic age.To address these issues,this study conducts the fluid inclusion analysis on quartz from auriferous sulfide-quartz veins and performs zircon U-Pb dating on Maoling pluton.The results indicate that the ore-forming fluids are dominated by aqueous and CO2-bearing inclusions,with the homogenization temperatures of 104.7-288.5℃,final ice-melting temperatures from-2.2 to-14.2℃,salinity of 3.53%-17.96%,density of 0.84-0.99 g/cm3,trapping pressures of 5.65-50.89 MPa,and the average mineralization depth of 10.5 km approximately.Laser Raman spectroscopy reveals that the vapor phase of the inclusions is primarily composed of H2O and CO2,with minor CH4,indicating that the ore-forming fluid represents an epi-mesothermal,low-moderate salinity,and low-moderate density NaCl-H2O-CO2±CH4 system.The zircon U-Pb dating yields an emplacement age of 181±1 Ma for Maoling pluton.The intrusion of this pluton into the second member of Gaixian Formation induced mineralization,with the altered monzogranite containing 0.2×10-6 of Au,suggesting a close genetic relationship between Maoling pluton and gold mineralization.It is inferred that the mineralization of Maoling gold deposit occurred after the emplacement of the pluton,that is,later than the Early Jurassic.关键词
金矿床/成矿流体/流体包裹体/猫岭岩体/早侏罗世/辽宁省Key words
gold deposit/ore-forming fluid/fluid inclusion/Maoling pluton/Early Jurassic/Liaoning Province分类
天文与地球科学引用本文复制引用
崔育菘,杨成会,赵辰,彭游博,刘国昊,李宝,李伟,刘文彬,姜立华,姜春宇..辽东猫岭金矿床流体包裹体特征和成矿时代研究[J].地质与资源,2025,34(5):550-561,594,13.基金项目
国家自然科学基金项目"迁安地区陆壳变形特征及对华北太古宙构造体制的约束"(42302221) （42302221）
中国地质调查局项目"辽宁1:5万石桥子(K51E016015)幅区域地质调查"(DD20240208201). （K51E016015）
