浙江湖州黄芝山剖面长兴组顶部古剥蚀面的识别及其地质意义
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摘要
通过浙江湖州黄芝山剖面的研究,发现其长兴组顶部存在清晰古风化壳残积物,本文描述了该古风化壳的沉积特征。精细的牙形石古生物地层学研究表明,该古风化壳代表的平行不整合面位于Clarkina meishanensis meishanensis带的底部,其层位相当于浙江煤山D剖面的25层底部,与二叠纪末生物集群灭绝主灭绝期层位基本一致。所以深入研究该古风化壳对探讨二叠纪末海平面变化和生物集群灭绝具有重要意义。
Well-preserved weathering crust is discovered at the top of the Changxing Formation in Huangzhishan section,Huzhou,Zhejiang. The characteristics of the weathering crust are described in this paper. The unconformity represented by the weathering crust is located at the lowermost part of Clarkina meishanensis meishanensis Zone. In stratigraphic horizon,it can be correlated with the bottom of the Bed 25 at the Meishan Section D and is coincident with the main episode of the mass extinction at the end-Permian. Therefore,it is very significative for discussing the sea-level change and the causes of the mass extinction at the end-Permian to study the weathering crust in detail.
Well-preserved weathering crust is discovered at the top of the Changxing Formation in Huangzhishan section,Huzhou,Zhejiang. The characteristics of the weathering crust are described in this paper. The unconformity represented by the weathering crust is located at the lowermost part of Clarkina meishanensis meishanensis Zone. In stratigraphic horizon,it can be correlated with the bottom of the Bed 25 at the Meishan Section D and is coincident with the main episode of the mass extinction at the end-Permian. Therefore,it is very significative for discussing the sea-level change and the causes of the mass extinction at the end-Permian to study the weathering crust in detail.
引文
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冯增昭等,1991.中下扬子地区二叠纪岩相古地理.北京:地质出版社,1~282.
姜红霞,吴亚生,袁生虎,2007.重庆二叠—三叠系界线地层的干裂缝和侵蚀面及其意义.高校地质学报,13(1):53~59.
赖旭龙,张克信,1999.二叠—三叠纪之交牙形石生态模式.地球科学—中国地质大学学报,24(1):33~38.
吴亚生,范嘉松,金玉?,2003.二叠纪末生物礁的出露及其意义.地质学报,77(3):289~296.
吴亚生,姜红霞,廖太平,2006a.重庆老龙洞二叠系一三叠系界线地层的海平面下降事件.岩石学报,22(9):2405~2412.
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殷鸿福,黄思骥,张克信等,1989。华南二叠纪—三叠纪之交的火山活动及其对生物绝灭的影响。地质学报,63(2):169~181。
殷鸿福,吴顺宝,杜远生等,1999.华南是特提斯多岛洋体系的一部分.地球科学,24(1):1~12.
张克信,童金南,殷洪福,吴顺宝,1996.浙江长兴二叠系—三叠系界线剖面层序地层研究.地质学报,70(3):270~281.
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Chen Z Qand Kaiho K,2006.Survival brachiopod faunas of the end-Permian mass extinction from the southern Alps(Italy)andSouth China.London:Cambridge University Press,143(3):301~327.
Erwin D H,1990.The End-Permian Mass Extinction.Annu.Rev.Ecol.Syst.,21:69~91.
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Kaji wara Y,Yamakita S,Ishida K,et al.,1994.Development of alargely anoxic stratified ocean andits temporary massive mixingat the Permian/Triassic boundary supported by the sulfurisotopic record.Palaeogeogr.Palaeocli mato.Palaeoecol.,111:367~379.
Sepkoski J J,1981.Afactor analytic description of the Phanerozoicmarine fossil record.Paleobiology,7,36~53.
Stanley S M,1988.Paleozoic mass extinction,shared patternssuggest global cooling as a common cause.Am.J.Sc.,288:334~352.
Wignal P B and Hallam A,1992.Anoxia as a cause of the Permo—Triassic mass extinction:facies evidence from northern Italyand the western United States.Palaeogeography,Palaeocli matology,Palaeoecology,93:21~46.
Wignal P B and Hallam A,1996.Facies changes and the end-Permian mass extinctionin S.E.Sichuan,China.Palaios,11:578~596.
Wu S B,Liu J H and Zhu Q,1996.The beginning cli max andamplitude of transgression.In:Yang Z Y,Wu S B,Yin H F,et al.eds.Permo—Triassic Events of South China.Beijing:Geological Publishing House,9~15.
Xu D Y,Ma S L,Chai Z F,Mao X Y,et al.,1985.Abundancevariation of iridiumand trace elements at the Permian/Triassicboundary at Shangsi in China.Nature.314:154~156.
陈军,Charles M.Henderson,沈树忠,2008.浙江黄芝山剖面二叠—三叠系界线附近的牙形类序列及其地层对比.古生物学报,47(1):91~114.
方宗杰,2004.二叠纪—三叠纪之交生物大灭绝的型式、全球生态系统的巨变及其原因.戎嘉余,方宗杰主编:生物大灭绝与复苏———来自华南古生代和三叠纪的证据.合肥:中国科学技术大学出版社,785~928.
冯增昭等,1991.中下扬子地区二叠纪岩相古地理.北京:地质出版社,1~282.
姜红霞,吴亚生,袁生虎,2007.重庆二叠—三叠系界线地层的干裂缝和侵蚀面及其意义.高校地质学报,13(1):53~59.
赖旭龙,张克信,1999.二叠—三叠纪之交牙形石生态模式.地球科学—中国地质大学学报,24(1):33~38.
吴亚生,范嘉松,金玉?,2003.二叠纪末生物礁的出露及其意义.地质学报,77(3):289~296.
吴亚生,姜红霞,廖太平,2006a.重庆老龙洞二叠系一三叠系界线地层的海平面下降事件.岩石学报,22(9):2405~2412.
吴亚生,Yang Wan,姜红霞等,2006b.江西修水二叠纪一三叠纪界线地层的海平面下降的岩石学证据.岩石学报,22(12):3039~3046.
殷鸿福,丁梅华,张克信等1995.扬子及其周缘东吴—印支期生态地层学.北京:科学出版社,5~122.
杨遵仪,殷鸿福,吴顺保等,1991.华南二叠—三叠纪过渡期地质事件.地质出版社,1~58.
殷鸿福,黄思骥,张克信等,1989。华南二叠纪—三叠纪之交的火山活动及其对生物绝灭的影响。地质学报,63(2):169~181。
殷鸿福,吴顺宝,杜远生等,1999.华南是特提斯多岛洋体系的一部分.地球科学,24(1):1~12.
张克信,童金南,殷洪福,吴顺宝,1996.浙江长兴二叠系—三叠系界线剖面层序地层研究.地质学报,70(3):270~281.
郑全锋,2006.浙江省长兴县煤山剖面二叠系—三叠系界线层序的沉积微相特征及层序地层划分.地层学杂志,30(4):373~383.
Chen Z Qand Kaiho K,2006.Survival brachiopod faunas of the end-Permian mass extinction from the southern Alps(Italy)andSouth China.London:Cambridge University Press,143(3):301~327.
Erwin D H,1990.The End-Permian Mass Extinction.Annu.Rev.Ecol.Syst.,21:69~91.
Erwin D H,1994.The Permo—Triassic extinction.Nature,367:231~236.
Hallam A and Wignal P B,1997.Mass extinctions and theiraftermath.Oxford University Press,1~307.
Jiang H S,Lai X L,Luo G M,et al,2007.Restudy of conodontzonation and evolution across the P/T boundary at Meishansection,Changxing,Zhejiang,China.Global and PlanetaryChange,55:39~55.
Kaji wara Y,Yamakita S,Ishida K,et al.,1994.Development of alargely anoxic stratified ocean andits temporary massive mixingat the Permian/Triassic boundary supported by the sulfurisotopic record.Palaeogeogr.Palaeocli mato.Palaeoecol.,111:367~379.
Sepkoski J J,1981.Afactor analytic description of the Phanerozoicmarine fossil record.Paleobiology,7,36~53.
Stanley S M,1988.Paleozoic mass extinction,shared patternssuggest global cooling as a common cause.Am.J.Sc.,288:334~352.
Wignal P B and Hallam A,1992.Anoxia as a cause of the Permo—Triassic mass extinction:facies evidence from northern Italyand the western United States.Palaeogeography,Palaeocli matology,Palaeoecology,93:21~46.
Wignal P B and Hallam A,1996.Facies changes and the end-Permian mass extinctionin S.E.Sichuan,China.Palaios,11:578~596.
Wu S B,Liu J H and Zhu Q,1996.The beginning cli max andamplitude of transgression.In:Yang Z Y,Wu S B,Yin H F,et al.eds.Permo—Triassic Events of South China.Beijing:Geological Publishing House,9~15.
Xu D Y,Ma S L,Chai Z F,Mao X Y,et al.,1985.Abundancevariation of iridiumand trace elements at the Permian/Triassicboundary at Shangsi in China.Nature.314:154~156.
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