扬子地块周缘中元古代末-新元古代主要构造运动梳理与探讨  

Discussion on the Mesoproterozoic and Neoproterozoic major tectonic events in marginal area of the Yangtze Block

作　　者：陈建书 代雅然[1] 唐烽 彭成龙[1] 张嘉玮 朱和书 陈兴 王文明 龚桂源 CHEN Jianshu;DAI Yaran;TANG Feng;PENG Chenglong;ZHANG Jiawei;ZHU HeshuCHEN Xing;WANG Wenming;GONG Guiyuan(Guizhou Geological Survey,Guiyang,550018;Institute of Geology,Chinese Academy of Geoscience,Beijing,100037;Guizhou Geology Archives,Guiyang,550001)

机构地区：[1]贵州省地质调查院,贵阳550018 [2]中国地质科学院地质研究所,北京100037 [3]贵州省地质资料馆,贵阳500001

出　　处：《地质论评》2020年第3期533-554,共22页Geological Review

基　　金：国家自然基金资助项目(编号:41572024);中国地质科学院基本科研业务项目(编号:YYWF201602);中国地质调查局地质调查项目(编号:12120114058401、121211121106);黔地矿科合[2019]22号;贵州省科技计划项目(贵州省地质调查院院士工作站,编号:黔科合平台人才[2018]5626)的成果。

摘　　要：限于地层年代及地层划分对比的差异,对扬子地块周缘中元古代末-新元古代晋宁与武陵造山运动、甚或雪峰运动的界定,一直存在争议。近年来我国前寒武纪地层年代研究取得众多新的进展与成果,为地层序列建立、划分对比和相关构造运动的研究与限定提供了新的客观依据。本文以扬子地块周缘中-新元古代地层年代研究及地层划分对比成果为基础,对晋宁运动、武陵运动及雪峰运动进行了重新梳理与探讨界定,对深入研究扬子地块周缘中-新元古代地层划分对比、盆地演化及其成矿资源响应具有重要意义。The boundary between the Mesoproterozoic and Neoproterozoic in the Yangtze Block in southern China is correlated with a series of orogenies. The stratigraphic correspondence between the Jinning Orogeny, the Wuling Orogeny and the Xuefeng Orogeny is controversialdue to the defitient age data in high resolution that causes the chaotic stratigraphic deivisions. We combined previous studies of the Mesoproterozoic-Neoproterozoic boundary and discussed the petrography,geochemistry and isotopic chronology. With new evidence of the plate tectonics and characteristics of lithology, we discussed the stratigraphy of the Jinning, Wuling and Xuefeng Orogenies. We found evidence that the Jinning,Wuling and Xuefeng Orogenies are overlapped in some areas of Yangtze Block. The end of Jinning Orogeny is around 1000 Ma correlated to strong metamorphism of the strata in Kunyang Group and create the igneous basement of the Yangtze Block. The specified boundaries of the orogenic events are critical to further stratigraphy divisions and correlations of the Yangtze Block for the Mesoproterozoic and Neoproterozoic.

关 键 词：晋宁运动 武陵运动 雪峰运动 中元古代末-新元古代 扬子地块周缘 

分 类 号：P534.3[天文地球—古生物学与地层学] P542[天文地球—地质学]