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| 东喜马拉雅地区晚三叠世—早侏罗世的菊石类 | |
| 引用本文： | 阴家润,刘桂芳,谢尧武.东喜马拉雅地区晚三叠世—早侏罗世的菊石类[J].现代地质,2007,21(1):31-44. |
| 作者姓名： | 阴家润 刘桂芳 谢尧武 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083 2. 中国地质科学院,地质研究所,北京,100037 3. 西藏地质勘查局,区域地质调查大队,西藏,拉萨,851400 |
| 摘 要： | 在东喜马拉雅范围以内的西藏康马、洛扎和隆子地区有国内首次发现的晚三叠世诺利期—早侏罗世Glyphidites、Phormedites、Epideroceras、Phricodoceras Uptonia等菊石。晚三叠世诺利期有Tibetites sp.、Anatibetites sp.、Glyphidites sp.、Cyrtopleurites sp.、Parajuvavites sp.、Sagenites sp.和Phormedites sp.。早侏罗世辛涅缪尔期有Arnioceras ceratoides、Angulaticeras sp.、Arnioceras sp.、Juraphyllites sp.、Epideroceras sp.以及普林斯巴赫期Phricodoceras cf.cornutum、Uptonia sp.、Galaticeras sp.、Gleviceras cf.paniceum等。东喜马拉雅地区的菊石动物群在晚三叠世—早侏罗世期间的幕式出现与海侵和沉积环境变深有关,代表受海平面变化控制的晚三叠世的诺利中期(Columbianus带)、早侏罗世的辛涅缪尔期(Semico-statum带)、以及普里斯巴赫早期(Jamestoni带)的全球性菊石动物群扩散和迁移。 |
| 关 键 词： | 东喜马拉雅 西藏 晚三叠世 早侏罗世 菊石类 |
| 文章编号： | 1000-8527(2007)01-0031-14 |
| 收稿时间： | 11 21 2006 12:00AM |
| 修稿时间： | 12 27 2006 12:00AM |
Late Triassic and Early Jurassic Ammonoids from Eastern Himalayas |
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| YIN Jia-run,LIU Gui-fang,XIE Yao-wu.Late Triassic and Early Jurassic Ammonoids from Eastern Himalayas[J].Geoscience——Journal of Graduate School,China University of Geosciences,2007,21(1):31-44. | |
| Authors: | YIN Jia-run LIU Gui-fang XIE Yao-wu |
| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China ; 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; 3. The Geological Survey Team of Tibetan Geological Exploring Bureau, Lhasa, Tibet 851400, China |
| Abstract: | Late Triassic and Lower Jurassic ammonoids were newly collected from Kongma,Lhozag and Lonzi,eastern Himalayas,including Tibetites sp.,Anatibetites sp.,Glyphidites sp.,Cyrtopleurites sp., Parajuvavites sp.,Sagenites sp.,Phormedites sp.(Middle Norian),Arnioceras ceratoides,Angulaticeras sp.,Arnioceras sp.,Juraphyllites sp.,Epideroceras sp.(Sinemurian),and Phricodoceras cf.cornutum,Uptonia sp.,Galatice-ras sp.,Gleviceras cf.paniceum(Pliensbachian).Glyphidites,Phormedites,Epideroceras,Phricodoceras and Uptonia are known in China for the first time.The ammonoid assemblages stratigraphically exhibit an episodic appearance,or a discontinuous sequence,dating the Columbianus,Semicostatum and Jamestoni Zones;the faunal migration or dispersal are referred to as global bio-events,forced by sea-level changes. |
| Keywords: | eastern Himalayas Tibet Late Triassic Early Jurassic Ammonoids |
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