论文摘要
As a result of lacking reliable age dating materials, the depositional age of the Proterozoic Tongjiazhuang Formation of the Tumen Group in western Shandong Province is still controversial.In this paper, we combined detrital zircon dating with microfossil assemblage to constrain the depositional age of the Tongjiazhuang Formation.The minimum detrital zircon 207 Pb/206 Pb age of a siltstone layer from the top of the Tongjiazhuang Formation at the Tangtou section is 1063±53 Ma, and at the Fulaishan section is 954±58 Ma, which constrains the maximum depositional age of the Tongjiazhuang Formation.Organic-walled microfossils extracted from the yellow-greenish shales of the Tongjiazhuang Formation consist of 23 species belonging to 12 genera.It is important to note that some genera Pellicularia, Navifusa, Chlorogloeaopsis, Ostina, Polytrichoides, Simia and Trachyhystrichosphaera are reported in this region for the first time.Also present in the Tongjiazhuang Formation are Trachyhystrichosphaera aimika（a species widely present in pre-Cryogenian Neoproterozoic and latest Mesoproterozoic rocks）.Biologically, the microfossil assemblage studied herein is similar to those from late Mesoproterozoic to early Neoproterozoic（pre-Cryogenian）, especially resembling to Liulaobei Formation（Tonian） in Huainan area.Therefore, based on the minimum age of detrital zircon and the characteristics of microfossil assemblage, we suggest that the depositional age of the Tongjiazhuang Formation is early Neoproterozoic（Tonian）.
论文目录
文章来源
类型: 国际会议
作者: Guangzhao ZHOU,Lei CHEN,Guangjin LI,Ke PANG,Chunmei HAN,Le YANG,Kai WANG,Weiguo LV
来源: 第一届亚洲古生物学大会—暨中国古生物学会成立90周年纪念 2019-11-17
年度: 2019
分类: 基础科学
专业: 生物学,地质学,地质学,地质学
单位: College of Earth Science and Engineering, Shandong University of Science and TechnologyZhejiang Province Nuclear Industry BrigadeState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences
分类号: Q911.2;P597.3
页码: 19-20
总页数: 2
文件大小: 221k
下载量: 5