江西修水莲花芯铜钼多金属矿床花岗岩LA-ICP-MS锆石U-Pb定年及其地质意义  

Single-zircon LA-ICP-MS U-Pb Dating and Their Implications of the Granite in the Lianhuaxin Copper Molybdenum Polymetallic Deposit,Xiushui County,Jiangxi Province

作　　者：杨春鹏[1] 夏菲[1] 潘家永[1] 张勇[1] 刘国奇[1] 

机构地区：[1]东华理工大学放射性地质与勘探技术国防重点学科实验室,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2014年第2期192-198,共7页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金资助项目(40872072;40963004);国家科技支撑计划项目(2011BAB04B02)

摘　　要：江西省莲花芯铜钼多金属矿床位于江南隆褶带西段,九岭成矿带西南部,前人对该矿床的研究程度较低。本文对矿床的赋矿主岩中细粒黑云母花岗岩进行LA-ICP-MS锆石U-Pb年龄测定,获得其成岩年龄为(833±13)Ma,锆石稀土元素地球化学特征表明为典型的壳源岩浆锆石。通过与九岭岩体晋宁期花岗岩的成岩时代和地球化学特征进行对比,表明二者具有同期同源性。因此,笔者认为研究区的赋矿主岩中细粒黑云母花岗岩属于九岭岩体晋宁期花岗岩。Jiangxi Lianhuaxin copper molybdenum polymetallic deposit is located in the western part of Jiangnan uplift fold belt and the southwestern of Jiuling metallogenic belt,the study of the former is extremely low.In this paper,Single-zircon LA-ICP-MS U-Pb Dating Of the medium fine grained biotite granite in the Host rock deposit was tested,the diagenetic age of rock is （833 ± 13） Ma,Zircon REE characteristics are typical crust source magmatic zircon.Through the comparison with the Jiuling rock of Jinling period granite rock forming age and Geochemical,found that the two have the same period homologous characteristics and obtained the study area are Jiuling rock of Jinling period granite.

关 键 词：九岭岩体 黑云母花岗岩 LA-ICP-MS 稀土元素 

分 类 号：P617[天文地球—矿床学]