甘肃靖远王家山地区凝灰岩锆石U-Pb年龄及地层对比意义
辛补社1, 杨华2,3, 王多云1,*, 付金华2,3, 姚泾利3,4, 罗安湘3,4, 张瑜1

SHRIMP U-Pb Age and Its Stratigraphic Significance of Tuff at the Baojishan Area, Jingyuan County, Gansu Province
Xin Bushe1, Yang Hua2,3, Wang Duoyun1*, Fu Jinhua2,3, Yao Jingli3,4, Luo Anxiang3,4, Zhang Yu1
图4 靖远王家山凝灰岩锆石UPb年龄谐和曲线及 加权平均年龄图 a王家山凝灰岩锆石UPb年龄谐和曲线；b12颗锆石U-Pb年龄相对集中部分的谐和曲线；c12颗锆石U-Pb加权平均年龄图
Fig.4 A U-Pb concordia diagram and weighted average age of tuff zircon in Wangjiashan area, Jingyuan County aA U-Pb concordia diagram of Wangjiashan tuff zircon; bConcordia diagram of 12 zircon grains that are relatively intensive U-Pb age of tuff zircons; cThe weighted average age diagram of 12 zircon grains selected from Wangjiashan tuff