湖南邓阜仙钨铌钽矿花岗细晶岩接触带白云母^(40)Ar/^(39)Ar年龄及其地质意义  

^(40)Ar/^(39)Ar dating of muscovite from the contact zone of granite-aplites in the Dengfuxian W-Nb-Ta deposit and its geological significance

作　　者：孙颖超[1] 陈郑辉[2] 赵国春[1] 黄鸿新[3] 曾乐[4] 晏超[1] 伍式崇 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083 [2]中国地质科学院矿产资源研究所,北京100037 [3]江西省地质矿产勘查开发局赣东北大队,江西上饶334000 [4]天津地质矿产研究所,天津300170 [5]湖南省地质矿产勘查开发局四一六队,湖南株洲412007

出　　处：《地质通报》2017年第2期466-476,共11页Geological Bulletin of China

基　　金：国土资源部公益性行业专项子课题<锡田矿田三维立体模型研究及成矿规律总结>(编号:201211024-02);中国地质调查局项目<中国矿产地质与区域成矿规律综合研究(中国矿产地质志)>(编号:1212011220369)

摘　　要：邓阜仙钨铌钽矿是锡田地区最为重要的钨锡多金属矿床之一。利用^(40)Ar/^(39)Ar同位素测年方法对金竹垄铌钽矿段花岗细晶岩顶部条带状白云母长石石英岩中的白云母进行了年龄测试,结果表明,^(40)Ar/^(39)Ar同位素坪年龄为148.3±1.1Ma,形成时代为晚侏罗世。结合锡田地区已有的年代学资料,认为包括邓阜仙钨铌钽矿在内的锡田地区钨锡多金属矿具有相同的成矿地质背景,为华南地区中生代岩石圈大范围伸展-减薄作用的产物。The Dengfuxian W-Nb-Ta deposit is one of the important W-Sn multi-metal ore deposits in Xitian area of Hu'nan Province.^(40)Ar/^(39)Ar dating of muscovite for the sample collected from the top of granite-aplites in Jinzhulong Nb-Ta zone yielded a ^(40)Ar/^(39)Ar plateau age of 148.3±1.1Ma, suggesting that the ore-forming process occurred in Late Jurassic. Combined with the existing chronological data of the Xitian area, the authors hold that the W-Sn multi-metal ore deposits of the Xitian area including the Deng-fuxian W-Nb-Ta deposit had the same geodynamic condition, and were formed by the extension and thinning of the Mesozoic lithosphere in South China.

关 键 词：锡田 邓阜仙岩体 金竹垄 白云母 ^40AR/^39AR年龄 

分 类 号：P618.2[天文地球—矿床学] P597.3[天文地球—地质学]