重庆科技大学学报（自然科学版）2025，Vol.27Issue(4)：1-9,9.DOI:10.19406/j.issn.2097-4531.2025.04.001
基于晚奥陶世GICE事件的地层年代框架构建与对比研究
Stratigraphic Chronological Framework Construction and Stratigraphic Comparison Study Based on GICE of Late Ordovician
摘要
Abstract
Stratigraphic comparison and division,fundamental challenges in geological research,are constrained by incomplete research materials,which complicates the establishment of high-precision chronological frameworks for certain sections.Therefore,based on the Late Ordovician Guttenberg Carbon Isotopic excursion(GICE)event,the construction and correlation of the chronostratigraphic framework are explored.Stratigraphic studies are conducted on the Dawangou section,and the GICE chronostratigraphic framework is established by integrating biostratigraphy,carbon isotope stratigraphy,and cyclostratigraphy methods.Comparisons are made with sections in South China,North America,and Europe.The G1,G2 and G3 peaks of the Cincinnati section in North America,the Daling section and Liangcun section in South China,and the Fjäcka section in Europe are redefined.The results show that the Cincinnati section in North America lacks most of the G1 peak,while the G2 and G3 peaks are well-preserved.The Daling and Liangcun section in South China only retain partial G1 peak,with complete records of G2 and G3 peaks,suggesting that their Sandbian strata are not entirely absent.Although the Fjäcka section in Europe lacks biostratigraphic constraints,a comprehensive chronostratigraphic division can still be achieved by integrating the GICE records from the section.关键词
晚奥陶世/古登伯格碳同位素漂移/地层对比/年代地层学/桑比阶—凯迪阶界线Key words
Late Ordovician/Gutternburg carbon isotopic excursion/stratigraphic comparison/chronostratigraphy/Sandbian-Katian boundary分类
天文与地球科学引用本文复制引用
严雪,刘欣春,张虹瑞,杨丽君,武丽婷,雷佳洁,马卫..基于晚奥陶世GICE事件的地层年代框架构建与对比研究[J].重庆科技大学学报（自然科学版）,2025,27(4):1-9,9.基金项目
国家自然科学基金青年基金项目"塔里木盆地晚奥陶世大洋红层研究"(41702113) （41702113）
