地质学报2025，Vol.99Issue(7)：2217-2239,23.DOI:10.19762/j.cnki.dizhixuebao.2024553
云南西部奥陶纪海相红层的分布与时代
Distribution and ages of the Ordovician marine red beds from western Yunnan,China
摘要
Abstract
Based on previous work on Stratigraphy and Palaeontology of western Yunnan,China,as well as field investigations of major sections in the Baoshan area conducted by the authors,this paper recognized 5 formation marine red beds(including 9 marine red beds)of Ordovician Period.The ages of these marine red beds confirmed by the fossils of graptolites,trilobites and cephalopods.They are the Yanging Formation marine red beds(including 2 marine red beds),the Mantang Formation marine red beds(Tremadocian),the Laojianshan marine red beds(including 2 marine red beds)or the Dakuangshan Formation marine red beds(Late Floian to Early Darriwilian),the Lower Pupiao Formation marine red beds(including 2 marine red beds)(Late Darriwilian to Sandbian),the Upper Pupiao Formation marine red beds(including 2 marine red beds)(Early to Middle Katian).All of them belong to shelf red beds(SRBs).On the basis of preliminary study of the red bed ages,this paper discusses:(D correlation between marine red beds in western Yunnan and contemporaneous marine red beds in major Chinese regions;(2)the widespread Dapingian marine red bed event in China;and ③ sedimentary models for the formation of Dapingian marine red beds in South China.According to currently available data,the global paleogeographic distribution of Ordovician Dapingian marine red beds is explored.Additionally,two genetic types of marine red beds are proposed as supplementary classifications.关键词
奥陶纪/海相红层/时代/分布/云南西部Key words
Ordovician/marine red beds/ages/distribution/western Yunnan引用本文复制引用
李明,林宝玉,李梦碧,季燕南..云南西部奥陶纪海相红层的分布与时代[J].地质学报,2025,99(7):2217-2239,23.基金项目
本文为中国地质科学院基本科研业务费项目(编号JKY202410)、中国地质调查局地质调查项目(编号DD20243471)和国家自然科学基金项目(编号42172035)联合资助的成果. （编号JKY202410）
