胶东玲珑金矿田金的赋存状态及其对成矿过程的指示意义  

Gold occurrence and its indicative significance to mineralization process in Linglong gold district,Jiaodong gold province

作　　者：冯岳川 邓军[1,2] 于皓丞 付强 崔涛 单伟 李增胜 李珊珊 FENG YueChuan;DENG Jun;YU HaoCheng;FU Qiang;CUI Tao;SHAN Wei;LI ZengSheng;LI ShanShan(School of Earth Science and Resources,State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;Shandong Institute of Geological Sciences,Ministry of Natural Resources Key Laboratory of Gold Mineralization Processes and Resources Utilization,Key Laboratory of Metallogenic-Geologic Processes and Comprehensive Utilization of Minerals Resources in Shandong Province,Jinan 250013,China;BGRIMM Technology Group,State Key Laboratory of Process Automation in Mining&Metallurgy,Beijing Key Laboratory of Process Automation in Mining&Metallurgy,Beijing 100160,China)

机构地区：[1]中国地质大学(北京)地球科学与资源学院,地质过程与矿产资源国家重点实验室,北京100083 [2]山东省地质科学研究院,自然资源部金矿成矿过程与资源利用重点实验室,山东省金属矿产成矿地质过程与资源利用重点实验室,济南250013 [3]矿冶科技集团有限公司,矿冶过程自动控制技术国家重点实验室,矿冶过程自动控制技术北京市重点实验室,北京100160

出　　处：《岩石学报》2023年第2期377-392,共16页Acta Petrologica Sinica

基　　金：国家自然科学基金项目(42261134535、42130801);国家重点研发计划(2019YFA0708603);北京市科技新星计划(Z201100006820097);高等学校学科创新引智计划(BP0719021);自然资源部金矿成矿过程与资源利用重点实验室和山东省金属矿产成矿地质过程与资源利用重点实验室开放课题(KFKT201802、KFKT202102)联合资助。

摘　　要：胶东地区是我国最大的黄金基地,探明黄金资源储量超过5000t。胶东地区金矿床主要发育两种矿化样式,即浸染状细脉-网脉型矿化和石英-硫化物脉型矿化,金主要以可见金形式赋存于黄铁矿和石英中。玲珑金矿田位于招平断裂带北端,同时发育两种矿化样式的矿体,是研究金赋存状态的理想选区,理清金的赋存状态对于选择合适的选冶工艺以及揭示金的成矿作用和富集机制具有重要的研究意义。在详实的野外地质调查基础上,通过显微岩相学观察、电子探针分析与矿物自动定量分析,对胶东玲珑金矿田两种不同矿化样式的样品中可见金的赋存状态进行了对比研究,探讨了金成矿过程。玲珑金矿田两种矿化样式矿石中金矿物的赋存状态并无显著差异,金矿物主要为银金矿和自然金。嵌布状态为裂隙金、包体金、粒间金,以粒间金和包体金为主。金矿物粒度以微粒-细粒为主,石英脉中偶见中粒-粗粒金矿物。金矿物主要以独立矿物形式以及与黄铜矿、方铅矿等硫化物共生的形式赋存于黄铁矿中。石英-黄铁矿阶段金矿物成色高于石英-多金属硫化物阶段金矿物成色,主要是受到成矿温度的影响。浸染状细脉-网脉型样品金矿物比石英-硫化物脉型样品金矿物具有更高的金成色,是由于两种矿化样式沉淀机制差异导致。Jiaodong is the largest gold province in China,with a total proven gold reserve exceeding 5000 tons.There are two main mineralization types of gold deposits in Jiaodong area,namely disseminated veinlets-stockwork type mineralization and quartz-sulfide vein type mineralization.Gold mainly occurs in pyrite and quartz in the form of visible gold.The Linglong gold field is located in the north of Zhaoping fault zone,where two types of mineralization ore bodies are developed at the same time.It is an ideal object for studying the gold occurrences.Its research has important scientific significance for selecting appropriate processing and smelting technology and revealing the mineralization and enrichment mechanism of gold.On the basis of detailed field geological survey,through microscopic petrographic observation,electron probe micro-analysis and automated quantitative mineralogical investigation,the occurrences of visible gold in two samples of different mineralization styles in the Linglong gold field in Jiaodong were studied,and the gold mineralization process was discussed.There is no significant difference in the occurrence of gold minerals between the two mineralized types of ores in the Linglong gold field.The gold minerals are electrum and native gold.The gold minerals in the ores of the two mineralized styles include fissure gold,inclusion gold and intergranular gold,which are mainly intergranular gold and inclusion gold.The size of gold minerals is mainly fine grain,and medium to coarse grain gold minerals are occasionally seen in quartz vein.Gold minerals mainly occur in pyrite in the form of independent minerals and associated with chalcopyrite and other sulfides.The fineness of gold minerals in the quartz-pyrite stage is higher than that in the quartz-polysulfides stage,which is affected by the mineralization temperature.The gold fineness of disseminated veinlets-stockwork type samples is higher than that of quartz-sulfide vein type samples,which is due to the difference in the precipitation mechanism of

关 键 词：金的赋存状态和成色 矿化样式 矿物定量分析 玲珑金矿田 胶东金成矿省 

分 类 号：P618.51[天文地球—矿床学]