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云开前加里东花岗质岩石Sm-Nd、Pb/Pb同位素定年及其意义
引用本文:彭松柏,战明国,张业明,邱瑞照,陈富文.云开前加里东花岗质岩石Sm-Nd、Pb/Pb同位素定年及其意义[J].地球学报,2000,21(1):52-57.
作者姓名:彭松柏  战明国  张业明  邱瑞照  陈富文
作者单位:中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所;中国地质科学院宜昌地质矿产研究所
基金项目:国家自然科学基金(青年)项目(编号49502036),地矿部“九五”重点科技攻关项目(编号95-02-00)
摘    要:利用Sm Nd ,Pb/Pb同位素测年方法对云开核部条带-眼球状花岗质岩石进行了年龄测定 ,首次获得Sm Nd全岩 14 14± 68Ma和Pb/Pb全岩 1388± 90Ma的等时线年龄 ,表明云开地区不仅在加里东期发生了造山运动 ,而且在中元古代发生了更为重要的构造 -岩浆造山运动 ,其时代与全球性格林威尔造山旋回可以对比。

关 键 词:云开地区    前加里东花岗质岩石    Sm-Nd、Pb/Pb同位素定年

Sm-Nd and Pb/Pb Isotopic Dating of Pre-Caledonian Granitic Rocks in Yunkai Area and its Significance
PENG Song-bai,ZHAN Ming-guo,ZHANG Ye-ming,QIU Rui-zhao and CHEN Fu-wen.Sm-Nd and Pb/Pb Isotopic Dating of Pre-Caledonian Granitic Rocks in Yunkai Area and its Significance[J].Acta Geoscientia Sinica,2000,21(1):52-57.
Authors:PENG Song-bai  ZHAN Ming-guo  ZHANG Ye-ming  QIU Rui-zhao and CHEN Fu-wen
Institution:Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS;Yichang Institute of Geology and Mineral Resources, CAGS
Abstract:The whole rock banded-augen granitic rock samples form Yankai uplifted area are dated Sm_Nd and Pb/Pb isotopically 1414±68Ma and 1388±90Ma respectively. These data indicate that the orogeny took place not only in Caledonian but also in Late Mesoproterozoic, which secms more important and is correlatable with global Grenville orogeny.
Keywords:Yunkai area  Pre-Caledonian granitic rock  Sm-Nd and Pb/Pb isotopic dating
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