Frederick A.Sundberg,赵元龙,袁金良,林日白

• 1:美国Show Low高级中学
• 2:贵州大学资源与环境工程学院
• 3:中国科学院南京地质古生物研究所
• 4:美国耶鲁大学地质与地球物理系

摘要(Abstract)：

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。

关键词(KeyWords)： 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

Abstract:

Keywords:

基金项目(Foundation): 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

作者(Author): Frederick A.Sundberg,赵元龙,袁金良,林日白

DOI: 10.19839/j.cnki.dcxzz.2010.03.007

参考文献(References)：

• Fletcher T P.2007.The base of Cambrian Series3:the global sig-nificance of key oryctocephalid trilobite ranges in the Kaili For-mation of South China.Mem Assoc Australasian Palaeon,33:29—33
• McCollum L B&Sundberg F A.2007.Cambrian trilobite biozona-tion of the Laurentian Delamaran Stage in the southern GreatBasin,U.S.A.:I mplications for global correlations and defininga Series3global boundary stratotype.Mem Assoc AustralasianPalaeon,34:147—156
• Peng J,Zhao Y L,Yuan J Let al.2009.Bathynotus:Akey trilo-bite taxon for global stratigraphic boundary correlation betweenCambrian Series2and Cambrian Series3.Prog Nat Sci,19:99—105
• Reed F R C.1910.The Cambrian Fossils of Spiti.(PalaeontologiaIndia),The Geological Survey of India,15(7):1—70
• Shabanov Y Y,Korovnikov I V,Pereladov V Set al.2008.Excur-sion1a.The traditional Lower-Middle Cambrian boundary inthe Kuonamka Formation of the Molodo River section(thesoutheastern slope of the Olenek Uplift of the Siberian Plat-form)proposed as a candidate for GSSP of the lower boundaryof the Middle Cambrian andits basal(Molodian)stage,definedby the FAD ofOvatoryctocara granulata.The Cambrian Sys-temof the Siberian Platform.Part2:North-East of the SiberianPlatform,XIII.Internat Field Conf Cambrian Stage SubdivisionWorking Group.Moscow-Novosibirsk.8—59
• Sundberg F A&McCollumL B.2003.Early and Mid Cambriantri-lobites fromthe outer-shelf deposits of Nevada and California,USA.Palaeontology,46:945—986
• Sundberg F A.2009.Placement of the Stage5,Series3GSSP(ap-proxi mately the“Lower-Middle”Cambrian Boundary):an up-date.International Conference on the Cambrian Explosion,Ab-stvac Voluni.90—91
• Tchernysheva N Y.1962.Cambriantrilobites of the Family Orycto-cephalidae.In:Shvedov N Aed.Problems of oil and gas occur-rence in the Soviet Arctic,palaeontology and biostratigraphy.3Trudy Nauchnoissledovatel'skii,3:3—64
• Yuan Jin-liang,Zhao Yuan-long,Li Yueet al.2002.Trilobite fau-na of the Kaili Formation(uppermost Lower Cambrian-lowerMiddle Cambrian)from southeastern Guizhou,South China.Shanghai:Science and Technology Press.1—423
• Yuan Jin-liang,Zhao Yuan-long,Li Yueet al.2009.Cambrian tri-lobiteOvatoryctocara granulataTchernysheva,1962and itsbiostratigraphic significance.Prog Nat Sci,19:213—221
• Zhao Yuan-long,Yuan Jin-liang,McCollum L Bet al.2001.Apo-tential GSSPfor the Lower and Middle Cambrian boundary nearBalang Village,Taijiang County,Guizhou Province,China.Ac-ta Paleontologica Sinica,40(Supplement):130—141
• Zhao Yuan-long,Yuan Jin-liang,Peng Jinet al.2007.Newdate onthe Wuliu-Zengjiaya Section(Balang,South China),GSSP can-didate for the base of Cambrian Series3.Associationof Austral-asian Palaeontologists,Memoir33:57—65