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地质学报  2010 

贵州南部地区安尼阶底界锆石SHRIMP年龄结果

, PP. 1112-1117

Keywords: 贵州望谟SHRIMPU-Pb定年中下三叠统安尼阶

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Abstract:

中国西南地区中下三叠统广泛发育多层凝灰岩,贵州望谟甘河桥剖面安尼阶底界,即中/下三叠统界线位于火山凝灰岩之下0.5m处为国际上奥伦尼克阶/安尼阶(Olenekian-Anisian)界线层型牙形石划分标志Chiosellatimorensis首现的位置。从火山凝灰岩分离出20颗岩浆成因锆石的SHRIMP年龄测定,获得206Pb/238U加权平均年龄为247.6±1.7(95%conf.)or±1.4(2σ)Ma,此结果与贵州关刀剖面Olenekian-Anisian界线附近凝灰岩用TIMS方法得出的247.2Ma±0.1Ma年龄有很好的一致性。望谟甘河桥剖面中下三叠统界线凝灰岩在华南地区大面积分布,本文的结果为区域地层对比和划分提供了新的年龄数据,同时为研究三叠纪初期生物复苏时限提供了新的年龄参考。

References

[1]  王彦斌,刘敦一,姚建新,纪战胜,王立亭,武桂春,黔西南下-中三叠统界线年龄,地质学报,2004(5).
[2]  姚建新,纪占胜,王立亭,王彦斌,武桂春,贵州南部地区中三叠统青岩阶底界附近牙形石生物地层学研究,地质学报,2004(5).
[3]  殷鸿福,杨遵仪,童金南,国际三叠系研究现状,地层学杂志,2000(2).
[4]  殷鸿福,童金南,关于中国的海相三叠系建阶及下三叠统分阶界线,地球科学-中国地质大学学报,2002(5).
[5]  Erwin D H,Bowring S A,Jin Yugan,End-Permian mass extinction:a review.In:Kocber C,ed.Special Paper 356:Catastrophic Events and Mass Extinctions:Impacts and Beyond,Geological Society of America Spcial Paper,2002.
[6]  Erwin D H,Extinction:How life on Earth nearly died 250 millon years ago,Princeton,New Jersey:Princeton University Press,2005.
[7]  Flügel E,Triassic reef patterns,SEPM Special Publication,2002.
[8]  Gradstein F M,Ogg J G,Smith A G,A Geological Time Scale,Cambridge:Cambridge University Press,2004.
[9]  Lehrmann D J,Payne J L,Felix S V,Dillett P M Wang Hongmei Yu Youyi Wei Jiayong,Permian-Triassic boundary sections from shallow-marine carbonate platforms of the Nanpanjiang Basin,South China:implications for oceanic conditions associated with the end-Permian extinction and its aftermath,Palaios,2003.
[10]  Lehrmann D J,Ramezani J,Bowring S A,Martin M W Montgomery P Enos P Payne J L Orchard M J Wang Hongmei Wei Jiayong,Timing of recovery from the end-Permian extinction:geochronologic and biostratigraphic constraints from south China,Geology,2006(12).
[11]  Ludwig K R,U sermanual for Isoplot/Ex,version 2.10,a geochronological tookit for Microsoft Excel Bakeley Geochronological Center Special Publication No.1a,1999.
[12]  Ludwig K.R,SQUID 1.03.A user\'s manual,Bakeley Geochronological Center Special Publication No.2,2002.
[13]  Martin M W,Bowring S A,Enos S A,Ramezani P Wei J Zhang J,Timing of Lower Triassic carbonate bank buildup and biotic recovery following the end-Permian extinction across the Nanpangjiang Basin,South China,Abstracts With Programs-Geological Society of America,2001.
[14]  Mundil R,Ludwig K R,Metcalfe I,Renne P R,Age and timing of the end-Permian mass extinction:U/Pb geochronology on closed system zircons,Science,2004.
[15]  Ogg J G,Ogg G,Gradstein F M,The Concise Geologic Time Scale,Cambridge:Cambridge University Press,2008.
[16]  Orchard M J,Taxonomy and correlation of Lower Triassic(Spathian) segminate conodonts from Oman and revision of some species of Neospathodus,Journal of Paleontology,1995.
[17]  Orchard M J,Tozer E T,Triassic conodont biochronology,its calibration with the ammonoid standard,and a biostratigraphic summary for the western Canada sedimentary basin,Bulletin of Canadian Petroleum Geology,1997.
[18]  Ovtcharova M,Bucher H,Schaltegger U,Galfetti T,Brayard A,Guex J,New Early to Middle Triassic U-Pb ages from south China:calibration with ammonoid biochronozones and implications for the timing of Triassic biotic recovery,Earth and Planetary Science Letters,2006.
[19]  ,Payne J L,Lehrmann D J,Wei Jiayong,Orchard M P,Schrag D P,Knoll A H,2004.
[20]  ,Large perturbations of the carbon cycle during recovery from the end-Permian extinction,Science,.
[21]  Payne J L,Lehrmann D J,Wei Jiayong,Knoll A H,Recovery from the end-Permian extinction in south China,Palaios,2006.
[22]  Schubert J K,Bottjer D J,Aftermath of the Permian-Triassic extinction event:paleoecology of Lower Triassic carbonates in the western USA,Palaeogeograpy Palaeoclimatology Palaeoecology,1995.
[23]  Tong Jiannan,Zhang Suxin,Zuo Jingxun,Xiong Xinqi,Events during Early Tiassic recovery from the end-Permian extinction,Global and Planetary Change,2007.
[24]  Williams I S,Claesson S,Isotopic evidence for the Precambrian provenance and Caledonian metamorphism of high grade paragneisses from the Seve Nappes,Scandinavian Caledonides:Ⅱ.Ion microprobe zircon U-Th-Pb,Contributions to Mineralogy & Petrology,1987.
[25]  Williams I S,U-Th-Pb geochronology by ion microprobe.In,1998.
[26]  Woods A D,Bottjer D J,Mutti M,Morrison J,Lower Triassic large sea-floor carbonate cements:their origin and a mechanism for the prolonged biotic recovery from the end-Permian mass extinction,Geology,1999.
[27]  胡世玲,李曰俊,戴?谟,蒲志平,贵州绿豆岩激光质谱40Ar-39Ar年龄,岩石学报,1996(3).
[28]  黄思静,裴昌蓉,卿海若,胡作维,吴素娟,孙治雷,四川盆地东部海相下―中三叠统界线的锶同位素年龄标定,地质学报,2006(11).
[29]  宋彪,张玉海,万渝生,锆石SHRIMP样品靶制作、年龄测定及有关现象讨论,地质论评,2002(zk).
[30]  童金南,殷鸿福,下扬子区海相三叠系层序地层研究,中国科学d辑,1997(5).
[31]  关建哲,戴克琳,杜其良,峨眉山绿豆岩的应用及其成因探索,成都地质学院学报,1990(2).
[32]  贵州省地质矿产局,贵州省地质志,北京:地质出版社,1987.
[33]  Bottjer D J,Biotic Recovery from Mass Extinctions.Palaeobiology Ⅱ,Oxford:Blackwell Science Inc,2001.

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