华南地质2024，Vol.40Issue(2)：286-306,21.DOI:10.3969/j.issn.2097-0013.2024.02.007
华夏地块中部震旦系区域对比及其大地构造意义:来自碎屑锆石年代学证据
Regional Correlation of Sinian Sedimentary of Central Cathaysia Block and Its Tectonic Significance:Evidence from Detrital Zircon Chro-nology
摘要
Abstract
Sinian sedimentary strata widely spread in central Cathaysia Block with unitary lithology and influ-ences of subsequent tectonic-magmatic events,making it very difficult to find complete section with top and bottom in the area.Therefore,the Sinian strata correlation between the Cathaysia and Yangtze blocks has still been controversial.This research focuses on the area of the central Cathaysia Block,northern Guangdong and eastern Guangdong,to conclude the lithology characteristics of late Neoproterozoic strata as a set of abyssal and semi-abyssal deposits dominated by shallow metamorphic sandstone and siltstone interspersed with sili-ceous rocks,with high silica content on the bottom and top,by geological route survey.The results of U-Pb dating of detrital zircon show that its provenance has two significant peaks of～1000Ma and～650Ma,with relatively complex composition,which is a typical"Cathaysia-typed"provenance.Based on the above-men-tioned results,the Sinian strata in central Cathaysia Block could be well correlated to that of the other areas of the South China Block,indicating a united sedimentary basin in the central South China without a wide ocean.关键词
震旦系/碎屑锆石LA-ICP-MS U-Pb定年/物源/地层对比/华夏地块Key words
Sinian System/LA-ICP-MS U-Pb dating of detrital zircon/material source/stratigraphic correla-tion/Cathaysia Block分类
天文与地球科学引用本文复制引用
宋芳,牛志军,何垚砚,杨文强..华夏地块中部震旦系区域对比及其大地构造意义:来自碎屑锆石年代学证据[J].华南地质,2024,40(2):286-306,21.基金项目
中国地质调查局地质调查项目(DD20243455、DD20240038、DD20230226、DD20221634),国家自然科学基金项目(U2244212、41772019)和古生物与地质环境演化湖北省重点实验室开放基金课题(PEL-202106) （DD20243455、DD20240038、DD20230226、DD20221634）
