U-Pb zircon age for the Daohugou Biota at Ningcheng of Inner Mongolia and comments on related issues
作者： Yongqing Liu , Yanxue Liu , Shu’an Ji , Zhiqing Yang
DOI: 10.1007/S11434-006-2165-2
关键词:
摘要: SHRIMP U-Pb zircon dating was carried out for the Daohugou Biota near Ningcheng of Inner Mongolia and lavas overlying or underlying salamander-bearing strata at Reshuitang in Lingyuan West Liaoning. The results suggest that occurred an interval from 168 Ma to 164–152 Ma. Both fossil assemblage are same biota thus developed 152 Ma, i.e. late Middle Jurassic early Late Jurassic. Biota-bearing rocks, resting on Jiulongshan Formation disconformity being overlain unconformity by Tuchengzi Early Cretaceous rocks containing Jehol Biota, mainly composed volcanic-sedimentary a normal sequence. It is recommended related stratigraphy should be correlated with Tiaojishan (Lanqi Liaoning) its synchronous rocks. suggested would neither taken into one nor considered as earliest elements Biota. Yixian were respectively formed different periods tectonics.
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