LA-ICP-MS Zircon U-Pb Geochronology of the Tuffs on the Uppermost of the Emeishan Basalt Succession in Panxian County , Guizhou
详细信息
- 责任者：Zhu Jiang (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Zhaochong
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(9)
- 关键词：凝灰岩 ; tuff ; 铀—铅计时 ; U-Pb dating ; 峨眉山玄武岩 ; Emeishan Basalt ; 贵州 ; Guizhou Province
- 页码：p.2743-2751
- 图表：4 illus., 1 table, 72 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
In 1990s, some researchers suggested a temporal link between volcanism of the Emeishan Large Igneous Province (ELIP) and the mass extinction at the Permian-Triassic Boundary (P-TB), and were supported by the 40Ar/39Ar isotopic dating showing that the ELIP formed in the Late Permian. However, in recent years, a quantity of SHRIMP U-Pb datings suggested that the large-scale volcanism erupted at ~260 Ma. Hence, the ELIP volcanism has been attributed to be the cause of the end-Guadalupian mass extinction in the Middle Permian. Thus, the result provides us a clue of a cause-and-effect relationship between the Emeishan large igneous province and the largest mass extinction in the earth’s history (P-TB).