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 。
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.
基金
国家自然科学基金!(青年 )项目 (编号 4 95 0 2 0 3 6)
地矿部"九五"重点科技攻关项目!(编号 95 - 0 2 - 0 0 )
关键词
云开地区
花岗质岩石
钐-钕
铅-铅
同位素定年
Yunkai area Pre_Caledonian granitic rock Sm_Nd and Pb/Pb isotopic dating
