湖南益阳中奥陶统大坪阶笔石生物地层分带及对比  

BIOZONATION AND CORRELATION OF DAPINGIAN(MIDDLE ORDOVICIAN)GRAPTOLITES FROM YIYANG,HUNAN PROVINCE,SOUTHERN CHINA

作　　者：李丽霞[1] 冯洪真[2] 王文卉[2] 

机构地区：[1]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,江苏南京210008 [2]南京大学地球科学与工程学院,江苏南京210023

出　　处：《地层学杂志》2016年第4期359-369,共11页Journal of Stratigraphy

基　　金：国家自然科学基金(Nos.41372017,41221001,41290260);现代古生物学与地层学国家重点实验室(No.143103)项目资助

摘　　要：根据对采自湖南益阳南坝剖面的笔石化石的研究,该剖面中奥陶统大坪阶自下而上可识别出2个笔石带:Pseudophyllograptus angustifolius elongatus带和Isograptus victoriae divergens带,初步探明该剖面大坪阶的笔石带序列。这一笔石带序列不仅可与我国华南三山地区、西南地区、湖北宜昌及江西崇义同期地层中的笔石带序列进行对比,还能与加拿大、美国、斯堪的纳维亚等地同期笔石带序列进行较好的对比。这一笔石带序列的建立为我国与国际同期地层的高精度对比提供了新的、详实的资料。Two graptolite biozones are identified in the Dapingian at the Nanba Section in Yiyang of Hu- nan, including in ascending order, the Pseudophyllograptus angustifolius elongatus biozone and the Isograptus victoriae divergens biozone. A consecutive graptolite succession that can be globally correlated has been established for the first time in the section, which can be correlated with those elsewhere in the Yangtze region, the Jiangnan region, and the Dongnan region of South China, as well as Scandinavia, Can- ada, America, South America, Australia, and Avalonia. This study provides detailed new data for global correlation of graptolite biozonation between China and other continents.

关 键 词：生物地层 笔石分带 地层对比 大坪阶 中奥陶统 益阳 湖南 

分 类 号：P534.42[天文地球—古生物学与地层学]