This study is supported by Project 200213000042of C hina G eological Survey;N ational N atural Science Form ation of C hinagrant 40272015and Project 20000077700of the State Plan for D evelopm ent of Basic R esearch in K ey Areas.
首次报道应用高分辨率、高精度离子微探针(SH R IM PⅡ)定年方法,对采自三峡地区黄陵背斜西翼湖北省秭归县九曲脑剖面震旦系灯影组与陡山沱组界线和陡山沱组底部的凝灰岩锆石进行的U -Pb定年研究。分析结果,灯影组与陡山沱组界线的凝灰...