论文摘要
As an essential part of South China, the Cathaysia Block has been more controversial than the Yangtze Block on its components, collision timing, tectonic location and other key geological issues, among which its relationship with the Neoproterozoic supercontinent Rodinia being significant.Here, we report the new evidence of sedimentary sequence and provenance from Ediacaran sedimentary strata in Dabu County of eastern Guangdong to improve that the Cathaysia Block had probably been a part of Rodinia, located relatively far from the margin.Ediacaran sedimentary strata in research area has been composed of continuous sedimentation of Nanyan and Huanglian formations of turbidites of metasandstone-sericite phyllite series from the bottom to middle, phyllite interbedded with siliceous rock in upper middle part and the topmost chert, which could be corresponded to Ediacaran sedimentation in the Yangtze Block.Through the observation of the metasandstone rock slice from Nanyan formation, its component maturity is middle with 50% quartz and 15% felspar, meanwhile its textural maturity is high with about 10% cements and well-sorted fragments.Detrital zircon sample from metasandstone of middle part of Nanyan formation displays major U-Pb age populations of 964.6 Ma and 601.9 Ma indicating the regional Grenvillan provenance affected by assembly of Gondwana and this link South China with western Australia, eastern India and East Antarctica during late Neoproterozoic.Overall, the characteristics of intra-basin deposition and the Grenvillian provenance in eastern Guangdong provide new evidence for the Cathaysia Block being a part of Rodinia, probably not on the margin.
论文目录
文章来源
类型: 国际会议
作者: Fang SONG,Zhijun NIU,Yaoyan HE,Wenqiang YANG
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: 地质学,地质学
单位: China University of GeosciencesWuhan Center of Geological SurveyKey Laboratory for Paleontology and Coevolution of Life and Environment,CGS
分类号: P535;P512.2
页码: 25-26
总页数: 2
文件大小: 181k
下载量: 1