河北宽城中元古代串岭沟组凝灰岩SHRIMP锆石U-Pb年龄及其地质意义  

SHRIMP Zircon U-Pb of Mesoproterozoic Chuanlinggou Formation from Kuancheng County in Hebei Province and its Geological Implications

作　　者：孙会一[1,2] 高林志[2] 包创[1] 陈岳龙[1] 刘敦一[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国地质科学院地质研究所,北京100037

出　　处：《地质学报》2013年第4期591-596,共6页Acta Geologica Sinica

基　　金：国家科技基础条件平台《北京离子探针中心开放项目》资助的成果

摘　　要：通过对采自河北宽城地区串岭沟组上部火山凝灰岩锆石的U-Pb SHRIMP定年,首次获得河北宽城地区中元古代串岭沟组沉积年龄为1621±12Ma,结合近年来华北地区一系列SHRIMP锆石U-Pb年龄数据,为中国地层委员会对前寒武纪地层年表进行重新标定,即长城系(Ch,1.8～1.6Ga),提供了河北宽城地区中元古代地层的新数据。Zircons collected from volcanic tuff rock samples from the upper part of the Chuanlinggou Formation in Kuancheng County, Hebei Province, were dated using the SHRIMPII at Beijing SHRIMP Center. The zircon U-Pb age obtained is 1621±12 Ma (MSWD=0.56) of 206Pb/238U age. Combined with numerous SHRIMP zircon U-Pb ages in other publications, chronological column of this area was determined. This provides new evidence for the Geological Time Scale of the Changcheng System (Ch, 1.8~1.6 Ga), which has been reconfirmed by the Commission of Stratigraphy of China.

关 键 词：河北宽城 中元古代 串岭沟组 SHRIMP锆石U-PB年龄 

分 类 号：P597.3[天文地球—地球化学]