中国地质2016，Vol.43Issue(5)：1750-1760,11.DOI:10.12029/gc20160523
北京北部千家店土城子组LA-ICP-MS锆石U-Pb同位素测年及启示
LA-ICP-MS U-Pb dating of zircons from Tuchengzi Formation in Qianjiadian of North Beijing and its significance
摘要
Abstract
Tuchengzi Formation is a widely distributed continental sedimentary stratum in northern Hebei and western Liaoning provinces. Since the 1980s, the stratigraphic age of this formation has attracted much attention and aroused heated debate among researchers. Through LA-ICP-MS U-Pb dating of zircons, the authors obtained two early Late Jurassic ages of this formation in Qianjiadian area. One of them is 157.6±0.7 Ma for the lower part, and the other is 157.1±1.0 Ma for the upper part. Combined with previous data, the ages of Tuchengzi Formation should be 163-130 Ma in the Yanshan area. During this period, Tuchengzi Formation showed mobility and intermittent sedimentary characteristics. The primary sedimentary ages of Yanshan area should be 146-137 Ma, and the contact relationship between Tiaojishan, Tuchengzi and Zhangjiakou formations are not in unconformity. The authors consider that they should be products of the same ectonic setting in most cases.关键词
土城子组/火山岩/锆石/LA-ICP-MS/年代地层Key words
Tuchengzi Formation/volcanic rocks/zircon/LA-ICP-MS/chronostratigraphy分类
天文与地球科学引用本文复制引用
焦润成,贺瑾瑞,王荣荣,王强强,回广骥..北京北部千家店土城子组LA-ICP-MS锆石U-Pb同位素测年及启示[J].中国地质,2016,43(5):1750-1760,11.基金项目
北京市国土资源局项目（0747-1361SITCN217）与北京市地质环境图系编制项目（1441STC60232）联合资助。 （）
