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

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±12 Ma，结合近年来华北地区一系列SHRIMP锆石 U-Pb年龄数据，探讨该地区地层柱的年代学标定。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, 1.8~1.6 Ga），提供了河北宽城地区中元古代地层新的数据。

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

Zircons attracted from a volcanic tuff rock sample which was collected 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 data provide a main 207Pb/206Pb age of 1621±12 Ma, interpreted as the depositional age of the Chuanlinggou Formation. Combine of a series of SHRIMP U-Pb dating from Mesoproterozoic in North China, we discuss the markets in Mesoproterozoic column of China and show new evidence for the Geological Time Scale of the Changcheng System 9 Ch, 1.8~1.6 Ga) which is reconformed by Commission of Stratigraphy of China.