华东地质2026，Vol.47Issue(1)：114-123,10.DOI:10.16788/j.hddz.32-1865/P.2024.01.012
扬子板块北缘中元古代晚期地层年代学研究进展
Geochronology of Upper Mesoproterozoic in the northern Yangtze Block:a review
摘要
Abstract
In the Late Mesoproterozoic period,a series of major plate tectonics,biological and environmen-tal events occurred on the Earth,attracting more and more attention in the geosciences circle.Stratigraphic succes-sions spanning this critical period are well developed and exposed in the northern part of Yangtze Block,laying the foundation for studying these Late Mesoproterozoic major events.Although extensive stratigraphic,paleonto-logical and geochemical studies have been carried out on these successions,their sedimentation period and geochronological frameworks are not well established.In this paper,we summarize the geochronological data of Upper Mesoproterozoic in the northern part of Yangtze Block,discuss their consistency against the stratigraphic sequence,and propose a temporary geochronological framework and correlation scheme for these successions.The new framework shows that the Shennongjia Group lacks age constraints on its lower boundary and its deposi-tion ended at ca 1.1 Ga;the lower part of Macaoyuan Group could be correlated to the upper part of Shennongjia Group and the deposition of its upper part may last till Neoproterozoic;the middle part of Dagushi Group is cor-relative with the upper part of Shennongjia Group,and the lower part of Dagushi Group including the Taiyangsi and Hanjiawa Formations were deposited during the Early Neoproterozoic,younger than the overlying Luohan-ling Formation,which indicates a reverse stratigraphic sequence within Dagushi Formation partially.关键词
扬子板块/中元古代/神农架群/打鼓石群/马槽园群/地质年代学Key words
Yangtze Block/Mesoproterozoic/Shennongjia Group/Dagushi Group/Macaoyuan Group/geochronology分类
天文与地球科学引用本文复制引用
陈知,杨传,朱茂炎,李献华..扬子板块北缘中元古代晚期地层年代学研究进展[J].华东地质,2026,47(1):114-123,10.基金项目
中国科学院南京地质古生物研究所"高精度地质年代学研究及能力建设(编号:E221110015)"项目资助. （编号:E221110015）
