安徽省东至县查册桥金矿地质特征及硫铅同位素示踪  

Geological features and sulfer and lead tracer isotopes of the Zhaceqiao gold deposit in Dongzhi county of Anhui province

作　　者：胥飞[1] 聂张星[1] 沈欢喜[1] 钱祥[1] 石磊[1] XU Fei;NIE Zhangxing;SHEN Huanxi;QIAN Xiang;SHI Lei(No.311 Geological Team, Anhui Bureau of Geology and Mineral Resources Exploration, Anqing 246003, Anhui, China)

机构地区：[1]安徽省地质矿产勘查局311地质队,安徽安庆246003

出　　处：《地质找矿论丛》2020年第2期145-153,共9页Contributions to Geology and Mineral Resources Research

基　　金：安徽省国土资源厅项目“安徽省东至县查册桥—西峰尖金铜多金属矿普查”;“安徽省东至县查册桥—西峰尖金铜多金属矿成矿条件及控矿因素研究”(编号:2012-1-28)联合资助。

摘　　要：东至县查册桥金矿位于扬子陆块北缘,矿床规模达中型。为了解成矿物质来源,对查册桥金矿矿石进行了硫、铅同位素分析。结果显示:δ(34S)变化范围为1.8×10-3~18.1×10-3,平均值为11.09×10-3,较集中分布在10×10-3~15×10-3之间,分布宽泛;矿石硫化物矿物206Pb/204Pb值介于17.954~19.748之间,207Pb/204Pb值介于15.608~15.786之间,208Pb/204Pb值介于38.107~39.411之间,它们的μ值9.43~9.77;ω值32.63~38.83;w(Th)/w(U)值介于3.31~3.93,Δβ值18.45~30.06;Δγ值22.96~57.97。硫、铅同位素特征表明查册桥金矿床成矿物质主要来源于上地壳,其形成与陆内造山作用和岩浆作用密切相关。Zhaceqiao gold deposit in Dongzhi County located at the north margin of Yangtze Block,It is a medium-sized gold deposit.Sulfer and Lead isotopes of ores from Zhaceqiao deposit were analyzed to understand the source of metallogenic materials,Results show that theδ(34SV-CTD)range from 1.8×10-3 to 18.1×10-3 with an average value of 11.09×10-3.They have a wide distribution and mainly distribute from 10×10-3 to 15×10-3.The ranges of 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb ratios of ore minerals are 17.954~19.748,15.608~15.786 and 38.107~39.411.The range ofμis from 9.43 to 9.77,The range ofωis from 32.63 to 38.83,The range of w(Th)/w(U)is from 3.31 to 3.93,The range ofΔβis from 18.45 to 30.06,The range ofΔγis from 22.96 to 57.97.These Sulfer and Lead isotopic features suggest that the Zhaceqiao gold deposit metallogenic materials are mainly derived from upper crust,It is closely related to intracontinental orogenesis and magmatism.

关 键 词：金矿床 地质特征 硫同位素 铅同位素 造山作用 安徽省 

分 类 号：P618.51[天文地球—矿床学]