摘要
出露在湘东北益阳—浏阳,呈近东西向断续分布,经角闪岩相—绿片岩相变质结晶片岩、层状、似层状超镁铁质岩的Sm-Nd全岩等时线年龄为2.6～3.028Ga、2.2～1.9Ga,应属湖南早前寒纪结晶基底岩片。
Early Precambrian metamorphic crystalline basement With EW strike exposed in Yiyang-Liuyang,Hunan.Crystalline schist,layer and layer-like ultramafic rocks underwent amphibolite facies and greenschist facies.The Sm-Nd isochron ages of the ultramafic rocks are 2.6～3.028 Ga and (2.2)～1.9 Ga.Therefore,they belong to eary Precambrian crystalline basement schist.
出处
《资源调查与环境》
2004年第1期55-63,共9页
Resources Survey & Environment
关键词
早前寒武
结晶基底
sm—Nd年龄
湖南
Early Precambrian
crystalline basement
Sm-Nd isochron age
Hunan
