账户: 密码:
湖南塔山花岗岩SHRIMP锆石U-Pb年龄及其地质意义
详细信息    查看全文 | 推荐本文 | 收藏本文
  • 英文篇名:SHRIMP zircon U-Pb age of Tashan granitic pluton from Hu'nan Province and its geological significance
  • 作者:郭爱民 ; 陈必河 ; 陈剑锋 ; 杜云 ; 郑正福 ; 周超 ; 田磊 ; 樊晖
  • 英文作者:GUO Aimin;CHEN Bihe;CHEN Jianfeng;DU Yun;ZHENG Zhengfu;ZHOU Chao;TIAN Lei;FAN Hui;Hunan Institute of Geological Survey;School of Geoscience and Infophysics/Central South University;
  • 关键词:花岗岩 ; SHRIMP锆石U-Pb年龄 ; 湖南塔山 ; 地质意义
  • 英文关键词:granite;;SHRIMP zircon U-Pb age;;Tashan;;Hu'nan Province;;geological implications
  • 中文刊名:地质通报
  • 英文刊名:Geological Bulletin of China
  • 机构:湖南省地质调查院;中南大学地球科学与信息物理学院;
  • 出版日期:2017-03-15
  • 出版单位:地质通报
  • 年:2017
  • 期:Z1
  • 基金:中国地质调查局项目《湖南上堡地区矿产远景调查》(编号:1212011120809)、《湘东地区花岗岩与成矿关系研究》(编号:1212011220520)、《南岭成矿带中西段地质矿产调查》(编号:121201009000150002)
  • 语种:中文;
  • 页:293-299
  • 页数:7
  • CN:11-4648/P
  • ISSN:1671-2552
  • 分类号:P588.121;P597.3
摘要
塔山花岗岩体位于湘南阳明山-塔山东西向构造-岩浆带东端,为呈近东西向延伸的岩基,出露面积约200km~2。岩体侵入于古生代地层中,接触面倾向围岩,倾角30°~50°,由四侵入次岩体组成,之间多为脉动接触关系,主要岩性为黑云母二长花岗岩。第二侵入次岩体SHRIMP锆石U-Pb年龄为218±3Ma,第三侵入次岩体SHRIMP锆石U-Pb年龄为215±3Ma。由此表明,塔山花岗岩形成于晚三叠世,相邻单元之间的时间间隔为3~5Ma。阳明山-塔山东西向构造-岩浆带主要形成于印支期。区内钨、锡、铜、铅、锌等多金属矿床丰富,找矿潜力较大,亦表明南岭地区不仅存在燕山期花岗岩成矿,印支期花岗岩也可成矿。
        Tashan granite pluton covering an area of 200km~2 is an EW-trending batholith which is located at the eastern end of the Yangmingshan-Tashan tectomagmatic belt in southern Hunan. The pluton intruded into the Paleozoic strata and its interface is inclined to the wall rock, with the dip angle ranges from 30° to 50°. The pluton is composed four periods of pulsation intrusive rock bodies and its main lithology is biotite adamellite. The SHRIMP zircon U-Pb age of the second-stage pluton is 218±3Ma and the third is 215±3Ma, as measured by the Beijing SHRIMP Center of Chinese Academy of Geological Sciences. It is suggested that the Tashan pluton was formed in the Late Triassic period, and the age gap with the neighboring intrusive bodies is 3~5Ma, suggesting that the EW-trending Yangmingshan-Tashan tectomagmatic belt was probably formed in Indo-Chinese epoch. This area is rich in tungsten, tin, copper, lead and zinc polymetallic deposits and has bright future for ore prospect in that the mineralization in the Nanling region occurred not only in Yanshanian epoch but also in Indo-Chinese epoch.
引文
[1]柏道远,陈建超,马铁球,等.湘东南骑田岭岩体A型花岗岩的地球化学特征及其构造环境[J].岩石矿物学杂志,2005,24(4):255-272.
    [2]陈必河,肖冬贵,周国祥.湖南邵阳-郴州北西向构造带花岗岩成岩与成矿[J].华南地质与矿产,2001,4:58-61.
    [3]陈必河,贾宝华,刘耀荣,等.湘南中生代火山岩中尖晶石二辉橄榄岩包体Sm-Nd等时线年龄及地质意义[J].地质论评,2004,50(2):180-183.
    [4]陈卫锋,陈培荣,周新民,等.湖南阳明山岩体的La-ICP-MS锆石U-Pb定年及成因研究[J].地质学报.2006,80(7):1065-1075.
    [5]蔡明海,梁婷,吴德成,等.桂西北丹池成矿带花岗岩地球化学特征及其构造环境[J].大地构造与成矿学,2004,28(3):306-313.
    [6]地质矿产部南岭项目花岗岩专题组.南岭花岗岩地质及其成因和成矿关系[M].北京:地质出版社,1989.
    [7]龚述清,黄革非,胡志科.大义山岩体东南部锡矿类型及找矿远景浅析[J].华南地质与矿产,2002,1:67-72.
    [8]柏道远,贾宝华,马铁球,等.湘东南印支期与燕山早期花岗岩成矿能力差异与岩石地球化学特征关系探讨[J].岩石矿物学杂志,2007,26(5):387-398.
    [9]湖南省地质矿产局.湖南省区域地质志[M].北京:地质出版社,1988.
    [10]湖南省地质矿产局.湖南省花岗岩单元-超单元划分及其成矿专属性[J].湖南地质,1995,(增刊8):1-84.
    [11]华仁民,毛景文.试论中国东部中生代成矿大爆发[J].矿床地质,1999,18(4):300-308.
    [12]李福顺,符海华.大义山云英脉型锡矿容矿构造特征[J].华南地质与矿产,2002,1:29-33.
    [13]马铁球,柏道远,邝军,等.湘东南茶陵地区锡田岩体锆石SHRIMP定年及其地质意义[J],地质通报,2006,24(5):416-419.
    [14]刘铁生.大义山矿田岩体型锡矿地质特征及矿床成因[J].中国地质,2002,29(4):411-415.
    [15]欧阳成甫.广西姑婆山岩体侵位构造及侵位机制研究[J].大地构造与成矿学,2002,26(3):331-334.
    [16]彭和求,伍光英.湘南"大义山"式构造的厘定和地质意义[J].湖南地质,2000,19(2):87-89.
    [17]伍光英,彭和求,贾宝华.湘南大义山岩体地质特征及其侵位机制分析[J].华南地质与矿产,2000,3:1-7.
    [18]宋彪,张玉海,万渝生,等.锆石SHRIMP样靶制作、年龄测定及有关现象讨论[J].地质论评,2002,48(增刊):26-30.
    [19]肖庆辉,邓晋福,马大铨,等.花岗岩研究思维与方法[M].北京:地质出版社,2002.
    [20]毛景文,谢桂青,郭春丽,等.南岭地区大规模钨锡多金属成矿作用成矿时限及地球动力学背景[J].岩石学报,2007,23(10):2329-2338.
    [21]蔡明海,陈开旭,屈文俊,等.湘南荷花坪锡多金属矿床地质特征及辉钼矿Re-Os测年[J].矿床地质,2006,25(3):263-268.
    [22]Ludwig K R.User′s manual for ISOPLOT/Ex version 2.4:Geochronological toolkid for Microsoft excel[M].Berkey Geochronology Center,Special Publication No.la,2000:1-53.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅:66554900、66554949;咨询服务:66554800;科技查新:66554700