| 贵州桐梓县境南部奥陶系-志留系界线地层新认识 |
| |
| 引用本文： | 戎嘉余,陈旭,詹仁斌,樊隽轩,王怿,张元动,李越,黄冰,吴荣昌,王光旭,刘建波.贵州桐梓县境南部奥陶系-志留系界线地层新认识[J].地层学杂志,2010,34(4). |
| |
| 作者姓名： | 戎嘉余 陈旭 詹仁斌 樊隽轩 王怿 张元动 李越 黄冰 吴荣昌 王光旭 刘建波 |
| |
| 作者单位： | 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;北京大学地球和空间科学学院,北京,100871 |
| |
| 基金项目： | 现代古生物学和地层学国家重点实验室、973项目课题(2006CB806402); 科技部基础性工作专项(2006FY120300-5); 国家杰出青年基金(No.40825006)的资助 |
| |
| 摘 要： | 贵州桐梓红花园山王庙的奥陶系-志留系分界地层出露好、有笔石带控制且发育介壳相化石,一直被认为是华南最佳剖面之一。本文对该剖面重新剖析,结合桐梓县境南区另外几条剖面的资料分析,提出如下新认识:山王庙剖面的"赫南特贝层"(HirnantiaBed:AFA295-305)和"介壳层"(Shelly Bed:AFA306-311c)宜合并统称为观音桥层,皆归于奥陶系;对照宜昌王家湾,将观音桥层与Normalograptus extraordinarius带上部和N.persculptus带下部对比;确定观音桥层与龙马溪组之间缺失N.persculptus带上部、A.ascensus带和P.acuminatus带大部分的地层。典型赫南特贝动物群延至A.ascensus带甚至更高层位的观点应予以修正。靠近黔中古陆北缘的诸多地点,观音桥层的厚度虽有变化,均宜视为同期沉积,唯上覆地层时代不同。赫南特贝动物群是在特定时期、特定环境中生存的特定底栖生物群落,是奥陶纪末大灭绝首幕后的产物,指示了寒凉、海退、相对浅水、底域富氧的环境条件,有重要的时代、环境和古地理意义。
|
| 关 键 词： | 奥陶系-志留系界线地层 赫南特贝动物群 假整合 观音桥层 桐梓 贵州 |
NEW OBSERVATION ON ORDOVICIAN-SILURIAN BOUNDARY STRATA OF SOUTHERN TONGZI COUNTY,NORTHERN GUIZHOU,SOUTHWEST CHINA |
| |
| RONG Jia-yu,CHEN Xu,ZHAN Ren-bin,FAN Jun-xuan,WANG Yi,ZHANG Yuan-dong,LI Yue,HUANG Bing,WU Rong-chang , WANG Guang-xu State Key Laboratory of Palaeobiology , Stratigraphy,Nanjing Institute of Geology , Palaeontology,Chinese Academy of Sciences,Nanjing ,LIU Jian-bo.NEW OBSERVATION ON ORDOVICIAN-SILURIAN BOUNDARY STRATA OF SOUTHERN TONGZI COUNTY,NORTHERN GUIZHOU,SOUTHWEST CHINA[J].Journal of Stratigraphy,2010,34(4). |
| |
| Authors: | RONG Jia-yu CHEN Xu ZHAN Ren-bin FAN Jun-xuan WANG Yi ZHANG Yuan-dong LI Yue HUANG Bing WU Rong-chang WANG Guang-xu State Key Laboratory of Palaeobiology Stratigraphy Nanjing Institute of Geology Palaeontology Chinese Academy of Sciences Nanjing LIU Jian-bo |
| |
| Institution: | RONG Jia-yu,CHEN Xu,ZHAN Ren-bin,FAN Jun-xuan,WANG Yi,ZHANG Yuan-dong,LI Yue,HUANG Bing,WU Rong-chang , WANG Guang-xu State Key Laboratory of Palaeobiology , Stratigraphy,Nanjing Institute of Geology , Palaeontology,Chinese Academy of Sciences,Nanjing 210008,LIU Jian-bo Department of Geology,Peking University,Beijing 100871 |
| |
| Abstract: | The Ordovician-Silurian boundary section at Shanwangmiao, Honghuayuan, southeast of Tongzi County Town was thought to be one of the best sections through the Ordovician-Silurian transition in China where the boundary rocks are well-exposed, continuous, and abundant with shelly fossils and the biostratigraphically impartant graptolites. On the basis of detailed investigation on the Shanwangmiao section together with several other sections in southern Tongzi, including the Nanbazi section of Honghuayuan, Sanc... |
| |
| Keywords: | Ordovician-Silurian boundary strata Hirnantia Fauna disconformity Kuanyinchiao Bed Tongzi Guizhou |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
