本文将参加年度优秀论文评选,如果您觉得这篇文章很好,请投下您宝贵的一票,谢谢! 支持(0)   不支持(0)

赣南柯树岭岩体锆石U-Pb年龄、岩石地球化学及成矿作用特征
投稿时间:2020-12-11  修订日期:2021-04-10  点此下载全文
引用本文:李伟,刘翠辉,谭友,陈伟,鲁捷,尹积扬,陈再威.2021.赣南柯树岭岩体锆石U-Pb年龄、岩石地球化学及成矿作用特征[J].地质论评,67(5):1309-1320,[DOI]:.
LI Wei,LIU Cuihui,TAN You,CHEN Wei,LU Jie,YIN Jiyang,CHEN Zaiwei.2021.Zircon U-Pb age,petro-geochemical and mineralization characteristics of Keshuling granites in southern Jiangxi Province[J].Geological Review,67(5):1309-1320.
DOI:10.16509/j.georeview.2021.06.071
摘要点击次数: 564
全文下载次数: 469
作者单位E-mail
李伟 江西省地质局赣南地质调查大队江西赣州341000 810788585@qq.com 
刘翠辉 江西省地质局赣南地质调查大队江西赣州341000  
谭友 江西省地质局赣南地质调查大队江西赣州341000  
陈伟 江西省地质局赣南地质调查大队江西赣州341000  
鲁捷 江西省地质局赣南地质调查大队江西赣州341000  
尹积扬 江西省地质局赣南地质调查大队江西赣州341000  
陈再威 江西省地质局赣南地质调查大队江西赣州341000  
基金项目:本文为中国地质调查局地质调查项目“江西崇义柯树岭—赣县合龙锡多金属矿集区矿产地质调查”(编号:DD20190166-12、DD20190166-2020-08)的成果
中文摘要:青山钨锡矿床位于南岭成矿带东段的九龙脑钨锡矿田内,石英脉型矿体主要产于柯树岭岩体外接触带。利用LA-ICP-MS锆石U-Pb定年方法测得花岗岩年龄为228.7~233.4 Ma,谐和年龄为231.0±0.63 Ma(MSDW=0.77),成岩时代属印支期。柯树岭花岗岩属过铝质高钾钙碱性岩石系列,岩石表现出高Si、高K、高Al和低Mg、低P、低Ti;富集成矿元素W、Sn,亏损Sr、Ba、Ti、Eu等微量元素的特征;岩石稀土元素总量低,轻重稀土元素分馏明显,配分曲线为右倾型。岩体的岩浆物质主要来源于地壳,成岩机制主要为后碰撞期或碰撞晚期的被动侵入。青山矿床具有一定的分带性,石英脉型矿体自上而下可划分为:细脉—中脉混合带(上部)和大脉带(中下部),少部分矿体延伸至岩体内。青山钨锡矿床成矿作用发生于印支期,全矿Sn矿化富集明显,推测九龙脑矿田北部存在有较大规模的印支期Sn成矿作用。
中文关键词:锆石U-Pb年龄  岩石地球化学  成矿作用  柯树岭岩体  印支期  赣南
 
Zircon U-Pb age,petro-geochemical and mineralization characteristics of Keshuling granites in southern Jiangxi Province
NameInstitution
LI WeiGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
LIU CuihuiGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
TAN YouGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
CHEN WeiGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
LU JieGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
YIN JiyangGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
CHEN ZaiweiGeological Survey Team of Gannan,Bureau of Geology of Jiangxi Province,Ganzhou,Jiangxi, 341000
Abstract:The Qingshan tungsten—tin deposit is a quartz-vein type ore deposit in the Jiulongnao tungsten—tin orefield.The study of Keshuling granites in this deposit not only helps to understand the features of metallogenic geological body,but also can provide evidences for the Indosinian mineralization.Methods: Detail geological survey,LA-ICP-MS zircon U-Pb dating of medium—fine two-mica granite,whole rock geochemical of biotite granite and two-mica granite in Qingshan deposit.Results:The zircon U-Pb dating of Keshuling granite yields emplacement age of 231.0±0.63 Ma (MSDW=0.77),belongs to the product of Indosinian magmatic activities.The whole-rock geochemical analyses show that Keshuling granite has the features of peraluminous,high-K and calc-alkali category,integrated with enrichments of SiO2,Al2O3,K2O,W, Sn,LREE,depletions of MgO,P2O5,TiO2,Sr,Ba,Ti,REE and Eu negative anomaly.Qingshan deposit is rich in tin mine and the orebody can divided into the thin—wide mix vein( upper part) and wide vein (middle and lower part), and little thin—huge vein in granite body. Conclusions: Keshuling granite is formed in the middle Triassic(228~233 Ma).According to the geochemical characteristics,Keshuling granite were mainly formethed by parital melting of crustal sedimentary rocks in the post-collision period or late stage of syn-orogenic tectonic setting.Qingshan deposit is characterized by "two levels" without "basement" of quartz-vein orebodies, and significant rich in tin.Acknowledgements: This research was supported by the geological survey projects by the China Geological Survey(Nos.DD20190166-12 and DD20190166-2020-08).
keywords:Zircon U-Pb ages,petro-geochemical,mineralization,Keshuling granites,Indosinian,south Jiangxi Province
查看全文  查看/发表评论  下载PDF阅读器
WeChat
s