山东焦家金矿田锶、铅同位素特征及其地质意义  

Sr and Pb Isotopic Characteristics and Geological Significance of Jiaojia Gold Field,Shandong Province

作　　者：祝培刚[1] 张文佳 王英鹏[1] 张春池[1] 王金辉[1] 张文[1] ZHU Pei-gang;ZHANG Wen-jia;WANG Ying-peng;ZHANG Chun-chi;WANG Jin-hui;ZHANG Wen(Shandong Institute of Geological Survey,Jinan 250014,China;Shandong Institute of Geological Sciences,Jinan 250013,China)

机构地区：[1]山东省地质调查院,济南250014 [2]山东省地质科学研究院,济南250013

出　　处：《科学技术与工程》2023年第2期487-493,共7页Science Technology and Engineering

基　　金：国家重点研发计划(2017YFC060150,2016YFC0600107);中国地质调查局项目(DD2019057019);山东省矿产资源保护监督项目(鲁矿保[2001]1号)。

摘　　要：焦家金矿田是胶西北地区重要的金矿产地,金矿类型以破碎带蚀变岩型为主,其成矿物质来源及成矿地质体尚存争议。采取了焦家金矿田深部样品,分析其同位素特征,研究成矿物质来源,探讨金矿成矿地质体。焦家金矿田金矿石黄铁矿87Sr/86Sr=0.711653~0.73245,按焦家金矿田平均成矿年龄120 Ma返算的(87Sr/86Sr)i的值,其范围0.710752~0.711986,与郭家岭花岗岩较为接近。焦家金矿田金矿石黄铁矿208Pb/204Pb=37.683~38.103,207Pb/204Pb=15.43~15.547,206Pb/204Pb=17.04~17.44。焦家金矿田金矿体铅为地幔和下地壳的混合源。郭家岭型花岗岩与焦家金矿田金矿形成时间相近,分布空间相依,与金矿体同位素组成接近,成因上有密切联系,是金矿的成矿地质体。Jiaojia gold field is an important gold producing area in Northwest Jiaodong.The type of gold deposit is mainly fracture zone altered rock type,and its source of ore-forming materials and metallogenic geological body are still controversial.The deep samples of Jiaojia gold field were took,their isotopic characteristics were analyzed,the source of ore-forming materials was studyed,and the metallogenic geological body of gold mineralization was explored.The gold ore pyrite of Jiaojia gold field is87Sr/86Sr=0.711653~0.73245.The value of(87Sr/86Sr)icalculated back according to the average metallogenic age of Jiaojia gold field is 120 Ma,which ranges from 0.710752~0.711986,which is close to guojialing granite.Gold ore pyrite in Jiaojia gold field208Pb/204Pb=37.683~38.103,207Pb/204Pb=15.43~15.547,206Pb/204Pb=17.04~17.44.The lead in the gold ore body of Jiaojia gold field is a mixed source of mantle and lower crust.The guojialing type granite is close to the gold deposit in Jiaojia gold field in formation time,distribution space,isotopic composition and genesis.It is the metallogenic geological body of gold deposit.

关 键 词：焦家金矿田 锶同位素 铅同位素 成矿物质来源 成矿地质体 

分 类 号：P581[天文地球—岩石学] P597[天文地球—地质学]