地质学报（英文版）2006，Vol.80Issue(5)：733-742,10.
LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia
LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia
摘要
Abstract
LA-ICPMS Zircon U-Pb dating is applied to volcanic rocks overlying and underlying the Salamander-bearing bed in the Daohugou beds of Ningcheng in Inner Mongola and Reshuichang of Lingyuan and Mazhangzi of Jianping in western Liaoning. The results indicate that the youngest age of the rocks in Daohugou of Ningcheng is 158 Ma, and the oldest one is 164 Ma. Synthesized researches indicate that the salamander-bearing beds in Daohugou of Ningcheng, Reshuichang of Lingyuan and Mazhangzi of Jianping were developed in the same period. The Daohugou beds were formed in the geological age of 164-158 Ma of the middle-late Jurassic. Whilst, the Daohugou beds and its correlative strata should correspond to the Tiaojishan Formation (or Lanqi Formation) of the middle Jurassic in northern Hebei Province and western Liaoning Province, based on the disconformity between the Daohugou beds and its overlaying beds of the Tuchengzi Formation of Late Jurassic and the Jehol Beds of early Cretaceous, and the disconformity between the Daohugou Beds and its underlying Jiulongshan Formation, which is composed of conglomerate, sandstone, shale with coal and thin coal beds.关键词
Inner Mongolia/Liaoning/Daohugou Beds/Zircon U-Pb dating/LA-ICPMS/TiaojishanFormation/JurassicKey words
Inner Mongolia/Liaoning/Daohugou Beds/Zircon U-Pb dating/LA-ICPMS/TiaojishanFormation/Jurassic分类
天文与地球科学引用本文复制引用
LIU Yanxue,LIU Yongqing,ZHANG Hong..LA-ICPMS Zircon U-Pb Dating in the Jurassic Daohugou Beds and Correlative Strata in Ningcheng of Inner Mongolia[J].地质学报（英文版）,2006,80(5):733-742,10.基金项目
This research was financially supported by the National Basic Research Project (grant 2006CB701405) and the investigation project (grant 1212010511605) of China Geological Survey. （grant 2006CB701405）
