扬子陆块东南缘南华纪地层对比  

CORRELATION OF THE NANHUAN STRATA ON THE SOUTHERN MARGIN OF THE YANGTZE LANDMASS

作　　者：彭学军[1,2] 刘耀荣[3] 吴能杰[3] 陈建超[3] 李建清[3] 

机构地区：[1]中国地质大学 [2]湖南地质调查研究院湖南湘潭411100 [3]湖南地质调查研究院

出　　处：《地层学杂志》2004年第4期354-359,共6页Journal of Stratigraphy

基　　金：中国地质调查局地质调查项目 ( No.2 0 0 113 0 0 0 0 12 )资助

摘　　要：扬子陆块东南缘的南华纪地层剖面众多 ,依据我国南华系与国际上“成冰系”相对应的原则 ,选择了其中 5条具代表性的剖面进行对比研究后认为 :扬子东南陆缘的冰川事件序列为长安冰期、富禄 (莲沱 )间冰期、古城冰期、大塘坡间冰期、南沱冰期 ;鄂西一带缺失长安冰期沉积 ;长安组的底界可定为南华系的底界 ,南沱组 (或洪江组 )的顶界可定为南华系的顶界 ;上下统的分界在莲沱组 (或富禄组 )与古城组之间 ;以冰川事件为主线 ,结合同位素年龄值 ,探讨了组与组跨相区对比中存在的问题以及南华系的年限。There are many stratigraphic sections of Cryogenian age on the southern margin of the Yangze Landmass. Bases on the principle of international Cryogenian, 5 representative sections are chosen and used for to stratigraphic correlation. We regarded that the glacier events are of Changan glacier age, Liantuo interglacial age, Gucheng glacier age, Datangpo interglacial age, Nantuo glacier age. The western Hubei lacks deposits of Changan glacier age. The base of the Changan Formation may be identified as the base of the Cryogenian System, the top of the Nantuo Formation as the top of the Cryogenian System. The Upper Series-Lower Series boundary is placed between the Liantuo and the Gucheng Formations. Based chiefly on the glacial events and combined with the isotopic age value, the problems in the stratigraphic correlation between the formations in the two facies areas and the range of the Cryogenian are preliminarily.

关 键 词：地层对比 同位素年龄 南华纪 扬子陆块 

分 类 号：P534.3[天文地球—古生物学与地层学]