中国中—新元古代地层研究进展及建议划分、对比方案  

Research advances,a subdivision and correlation of the Meso-Neoproterozoic stratigraphy in China

作　　者：旷红伟[1] 柳永清[1] 耿元生[1] 彭楠[1] 王玉冲 陈骁帅 刘燕学[1] 杨锋杰 赵峰华[2] 刘鹏举[1] 杜利林[1] 宋换新 王德海[5] 王昌勇[6] 白华青 东归霖 祁柯宁 KUANG Hongwei;LIU Yongqing;GENG Yuansheng;PENG Nan;WANG Yuchong;CHEN Xiaoshuai;LIU Yanxue;YANG Fengjie;ZHAO Fenghua;LIU Pengju;DU Lilin;SONG Huanxin;WANG Dehai;WANG Changyong;BAI Huaqing;DONG Guilina;Qi Kening(Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;College of Geosciences and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590,China;College of Resources and Environment,Yangtze University,Wuhan,Hubei 430100,China;College of Earth Science,Jinlin University,Changchun,Jilin 130061,China;Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu,Sichuan 610059,China;Chinese Academy of Geological Sciences,Beijing 100037,China;School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 230009,China)

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [3]山东科技大学地球科学与工程学院,山东青岛266590 [4]长江大学资源与环境学院,湖北武汉430100 [5]吉林大学地球科学学院,吉林长春130061 [6]成都理工大学沉积地质研究院,四川成都610059 [7]中国地质科学院,北京100037 [8]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《地质学报》2023年第12期3861-3901,共41页Acta Geologica Sinica

基　　金：国家重点研发计划项目(编号2022YFF0800302,2016YFC0601001);国家自然科学基金项目(编号42072135);中国地质调查局项目(编号DD20221649);北京科委国际创新资源合作项目(编号Z201100008320007)联合资助的成果。

摘　　要：本文系统梳理了中国地层表(2014)中—新元古界尚存的地层学问题,并以十多年来有关专家及本课题组地层年代学成果为基础,结合地质事件的时空发育和对比关系,重点研究了中元古界底界、中元古界待建系、中—新元古代过渡时期地层关系、成冰系底界的划分及震旦系罗圈冰期的时代归属。在此基础上提出了中—新元古代地层划分和对比方案建议,并进一步讨论和对比了中国华北、扬子和塔里木三大陆块中—新元古代地质特征异同。研究表明:中国中元古界以1800 Ma(或1780 Ma)为底界,比1600 Ma更合理;中元古界待建系虽在华北陆块北缘和南缘、扬子陆块北缘和南缘均发育,但以扬子陆块北缘神农架地区神农架群最佳,建议暂以神农架群为待建系候选层型进行重点研究;华北胶辽徐淮吉豫的原青白口纪地层很可能跨越了1000 Ma界线,有一部分地层属于中元古界;建议与国际接轨,原南华系与成冰系对应(720~635 Ma);青白口系以820 Ma构造面为界两分,下部称青白口系下统(1000~820 Ma),上部称青白口系上统(820~720 Ma),待以后证据更充分时再决定是否分为两个系;华北陆块南缘以罗圈冰川为代表的罗圈组及相应地层归入震旦系上部。以上研究为中国地层表“中—新元古界”划分对比方案的修订和完善提供了基础资料、划分依据和参考方案。This paper systematically sorts out the Meso-Neoproterozoic stratigraphic problems on the Stratigraphic Chart of China(2014),based on the achievements of relevant experts and the author's team in stratigraphic chronology in the past 1o years.By combining the results with the spatio-temporal development and correlation relationship of geological events,the study focuses on studying the definition of the bottom boundary of the Mesoproterozoic and the Mesoproterozoic Undefined System,the stratigraphic relationship in the Meso-Neoproterozoic transition period,and the division of the lower boundary of the Cryogenian,as well as the timing of the Tonian Luoquan glaciation.On this basis a subdivision and correlation framework of the Meso-Neoproterozoic strata of China are presented and the similarities and differences among the North China,Yangtze,and Tarim block discussed.The research indicates that it is more reasonable to set 1800 Ma(or 1780 Ma)as the lower boundary of the Mesoproterozoic than 16oo Ma.Although the Mesoproterozoic Undefined System is developed in both the northern and southern margins of North China and South China block,the Shennongjia Group in the northern margin of the Yangtze block is more favorable than others and as a result,suggested as the temporary stratotype of the Undefined System in China for focused research.The proto-Qingbaikou System in Jiao-Liao-Xuhuai-Ji-Yu of the North China block,is probably older than 10oo Ma,i.e.,parts of it belong to the Mesoproterozoic.We propose that the proto-Nanhuan System corresponds to the international Cryogenian(720~635 Ma).The Qingbaikou System is bounded by a tectonic plane dated to 820 Ma-its lower part is named as the Lower Series of the Qingbaikou System(1000~820 Ma),and the upper part is named as the Upper Series of the Qingbaikou System(820~720 Ma).The decision on whether to divide these into two systems will be made when more evidence becomes available.The Luoquan Formation and coeval strata in the southern margin of North China block probably belo

关 键 词：中—新元古界 划分方案 地层对比 年代地层 事件地层 中国地层表 

分 类 号：P534.3[天文地球—古生物学与地层学]