贵州剑河乌溜-曾家崖寒武系第5阶全球层型剖面及点位研究的新资料(英文)  

RECENT QUARRYING ACROSS THE PROPOSED GSSP FOR STAGE 5 (CAMBRIAN) AT THE WULIU-ZENGJIAYAN SECTION,GUIZHOU,CHINA

作　　者：Frederick A.Sundberg 赵元龙[2] 袁金良[3] 林日白[3,4] 

机构地区：[1]美国Show Low高级中学,500 W.Old Linden Rd.,Show Low,AZ 85901 [2]贵州大学资源与环境工程学院,贵州贵阳550003 [3]中国科学院南京地质古生物研究所,江苏南京210008 [4]美国耶鲁大学地质与地球物理系,纽黑文CT06511

出　　处：《地层学杂志》2010年第3期289-292,共4页Journal of Stratigraphy

基　　金：the National Natural Science Foundations of China(No.40672018);the Ministry of Technology and Science of China(2006C13806401);Chinese National Committee on Stratigraphy Special Science and Technology Foundation of Guizhou.(Gui.Sci.Ji2007-4004);International cooperation Project of Guizhou Science and Technology(G.[2008]700110);国家自然科学基金(No.40672008);科技部科技基础工作专项(2006FY120300-4)资助

摘　　要：贵州剑河八郎乌溜—曾家崖寒武系第5阶底界潜在的全球层型剖面及点位上下的动物群(三叶虫和无铰纲腕足类)有显著的变化;研究的剖面厚约4.5m,穿过首现点位Oryctocephalus indicus。经逐层化石的采集和深入的研究,证实在寒武系第4阶或寒武系第2统顶部Ovatoryctocara granulata-Bathynotus holopygus带与寒武系第5阶或寒武系第3统底部Oryctocephalus indicus带之间大约有20cm的贫化石间隔区。这一动物群的突变是在均一的岩相中发生的,表明该剖面是建立寒武系第5阶(或第3统)底界的全球层型剖面和点位(GSSP)理想剖面。Quarrying across a potential GSSP of the Cambrian Stage 5/Series 3 boundary indicates a significant change in trilobite and inarticulate brachiopod faunas. The quarry spans approximately 4.5 m across the potential boundary,which is the FAD of Oryctocephalus indicus in the Wuliu-Zengjiayan section. Detailed collections show that the faunas of the Ovatoryctocara granulata-Baythyonotus holopygus and the O. indicus zones changed in a 20 cm,relatively barren interval. This faunal turnover does not coincide with a lithologic change and suggests that the section would be a good location for the GSSP of the Cambrian Stage 5/Series 3.

关 键 词：全球界线层型剖面及点位 三叶虫 生物地层 凯里组 寒武系 剑河 贵州 

分 类 号：P534.41[天文地球—古生物学与地层学]