彭博,沙金庚,蔡华伟,李建国,张晓林,王亚琼,饶馨

• 1:国土资源部南京地质矿产研究所
• 2:中国科学院南京地质古生物研究所

摘要(Abstract)：

全球性的下白垩统阿普特阶-阿尔布阶界线或阿尔布阶的底界迄今尚未得到统一。我国藏南岗巴盆地发育有包括阿普特阶和阿尔布阶在内的良好的海相白垩纪地层,并产有菊石和双壳类等宏体化石。因此,此区是研究阿普特阶-阿尔布阶界线的重要地区。经鉴定,岗巴察且拉剖面阿普特阶-阿尔布阶界线附近的菊石包括了2科5属4种和4未定种:Hypacanthoplites xizangensis Chao,Acanthohoplites aschiltaensis(Anthula),Douvilleiceras mammillatum(Schlotheim),Cheloniceras seminodosum,Cheloniceras sp.,Acanthohoplites sp.,Hypacanthoplites sp.和?Pseudosonneratiasp.。此菊石动物群自下而上可以划分出3个组合/层:阿普特期晚期Hypacanthoplites组合,阿普特期末期Hypacanthoplites-Acanthohoplites组合和阿尔布期早期Douvilleiceras-?Pseudosonneratia组合。菊石的组合及其层序表明岗巴察且拉剖面中Hypacanthoplites-Acanthohoplites与Douvilleiceras-?Pseudosonneratia之间可能存有潜在的阿普特阶-阿尔布阶的生物地层界线。

关键词(KeyWords)： 生物地层;菊石;双壳类;阿普特阶-阿尔布阶界线;岗巴东山组;岗巴;西藏

Abstract:

Keywords:

基金项目(Foundation): 中国科学院战略性先导科技专项(B类)(XDB03010101);; 国家自然科学基金(No.40872013);; 青年基金(No.41302011)资助

作者(Author): 彭博,沙金庚,蔡华伟,李建国,张晓林,王亚琼,饶馨

DOI: 10.19839/j.cnki.dcxzz.2014.03.002

参考文献(References)：

• 苟宗海.1985.西藏岗巴宗山地区晚白垩世到古新世的双壳类化石.成都理工学院学报,2:62-73.
• 苟宗海.1987.西藏岗巴地区白垩纪双壳类动物群.青藏高原地质文集,18:146-170.
• 万晓樵.1985.西藏岗巴地区白垩纪地层及有孔虫动物群.青藏高原地质文集,16:203-228.
• 王义刚,孙东立,何国雄.1980.喜马拉雅地区(我国境内)地层研究的新认识.地层学杂志,4(1):55-59.
• 文世宣,蓝琇,陈金华等.1976.珠穆朗玛峰地区的瓣鳃类化石//珠穆朗玛峰地区科学考察报告1966-1968(古生物)(第三分册).北京:科学出版社.1-210.
• 文世宣.1974.珠穆朗玛峰地区的地层白垩系//珠穆朗玛峰地区科学考察报告1966—1968.北京:科学出版社.148-183.
• 张启华.1985.西藏聂拉木地区普普嘎组早白垩世菊石的发现及其地层意义.青藏高原地质文集,16:165-184.
• 张启华.1986.西藏岗巴地区白垩世坎潘期(Campanian)菊石.青藏高原地质文集,9:69-83.
• 赵金科.1976.珠穆朗玛峰地区侏罗、白垩纪菊石//珠穆朗玛峰地区科学考察报告1966-1968(古生物)(第三分册).北京:科学出版社.503-545.
• Arkell W J.1953.Bajocian ammonites collected by Sir Henry Hayden near Kampadzong,Tibet.Geological Magazine,90:331-336.
• Breistroffer M.1947.Sur les zones d'ammonites dans l'Albien deFrance et d'Angleterre.Univer Grenoble,26:17-104.
• Casey R.1961.The stratigraphical palaeontology of the LowerGreensand.Palaeontology,3:487-621.
• Casey R.1999.The age of the ArgilesàBucaillella of Normandy,the systematic position of the Cretaceous ammonite genera Bucaillella and Arcthoplites,and the delimitation of the Aptian/Albian boundary.Cretaceous Research,20:609-628.
• DouvilléH.1916.Le Cretace et l’Eocene du Tibet central.PalaeontIndica,5(3):1-52.
• Hancock J M.2001.A proposal for a new position for the Aptian/Albian boundary.Cretaceous Research,22:677-683.
• Kemper E.1975.Die Cephalopoden aus dem Unter-Alb(ZonederLeymeriella tardefurcata)von Altwarmbuchen.Berichte derNaturhistorischen Gesellschaft,119:87-111.
• Kennedy W J,Gale A S,Bown P R,Caron M,Davey R J,GrockeD&Wray D S.2000.Integrated stratigraphy across the Aptian-Albian boundary in the Marnes Bleues,at the Col de PreGuittard,Arnayon(Brme),and at Tartonne(Alpes-deHaute-Provence),France:a candidate Global Boundary Stratotype Section and Boundary Point for the base of the AlbianStage.Cretaceous Research,21:591-720.
• Mutterlose J,Bornemann A,Luppold F W,Owen H G,Ruffell A,Weiss W&Wray D.2003.The Vhrum section(northwestGermany)and the Aptian/Albian boundary.Cretaceous Research,24:203-252.
• Owen H G.1999.Correlation of Albian European and Tethyan ammonite zonations and the boundaries of the Albian stage andsubstages:some comments.Scripta Geology,Special Issue,3:129-149.
• Owen H G.2002.The base of the Albian Stage determined by ammonites and the North German succession:comments on recentproposals.Cretaceous Research,23:1-13.
• Reboulet S,Rawson P F,Moreno-Bedmar J A,Aguirre-Urreta MB,Barragan R,Bogomolov Y,Company M,Gonzalez-ArreolaC,Stoyanova V I,Lukeneder A,Matrion B,Mitta V,Randrianaly H,Vasicek Z,Baraboshkin E J,Bert D,Bersac S,Bogdanova T N,Bulot L G,Latil J L,Mikhailova I A,Ropolo P&Szives O.2011.Report on the 4th International Meeting of theIUGS Lower Cretaceous Ammonite Working Group,the“Kilian Group”.Cretaceous Research,21:786-793.
• Wen Shi-xuan.2000.Cretaceous bivalves of Kangpa Group,SouthXizang,China and their biogeography.Acta PalaeontologicaSinica,39(1):1-27.