地质通报2017，Vol.36Issue(10)：1750-1759,10.
闽西南下古生界东坑口组与魏坊组地层层序与物源区特征——来自碎屑锆石LA-ICP-MS U-Pb测年的约束
Stratigraphic sequence and characteristics of the source area of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian: Constraints from detrital zircon LA-ICP-MS U-Pb dating
摘要
Abstract
The stratigraphic sequence of Lower Paleozoic Weifang Formation and Dongkengkou Formation in southwestern Fujian has long been a problem of controversy . In this paper, the authors studied geochronology of 120 detrital zircon samples from the Lower Paleozoic Weifang Formation and Dongkengkou Formation sedimentary rocks in southwestern Fujian by LA-ICP-MS U-Pb dating, and obtained zircon ages ranging from 506Ma to 3431Ma, with most of the data from 511Ma to 2796Ma, the main peak value 964Ma, a secondary peak value 514Ma, and secondary peak values 813Ma, 1231Ma, 2483Ma. Characteristics of the age spectrum suggest that Weifang Formation was deposited earlier than Dongkengkou Formation. Age of Dongkengkou Formation does not belong to Middle-Upper Cambrian. Lower Paleozoic source with peak value at 964Ma most significantly reflects the Grenville tectonic event. The au-thors also received peak value age of 514Ma of Pan-African tectonic event. In addition, the authors found Paleoarchean zircon ages re-cord. Important new information is thus provided for the establishment of Lower Paleozoic stratigraphic sequence;source studies.关键词
地层层序/魏坊组,东坑口组/碎屑锆石/LA-ICP-MSU-Pb测年Key words
stratigraphic sequence/Weifang Formation/Dongkengkou Formation/detrital zircon/LA-ICP-MS U-Pb dating分类
天文与地球科学引用本文复制引用
肖爱芳,黎敦朋..闽西南下古生界东坑口组与魏坊组地层层序与物源区特征——来自碎屑锆石LA-ICP-MS U-Pb测年的约束[J].地质通报,2017,36(10):1750-1759,10.基金项目
福建省自然科学基金项目《福建西部早古生代地层层序的碎屑锆石LA-ICP-MS U-Pb测年的约束》(编号:2014J01157) （编号:2014J01157）
