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现代地质 ›› 2007, Vol. 21 ›› Issue (1): 31-44.

• 古生物学与沉积学 • 上一篇    下一篇

东喜马拉雅地区晚三叠世—早侏罗世的菊石类

阴家润,刘桂芳,谢尧武   

  1. 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
  • 收稿日期:2006-11-21 修回日期:2006-12-27 出版日期:2007-01-20 发布日期:2007-01-20
  • 作者简介:阴家润, 男, 教授, 博士生导师,1944年出生,地层古生物专业,从事中生代菊石、双壳类的研究工作。Email:yjr@cugb.edu.cn。
  • 基金资助:

    国家自然科学基金项目(40572013,  40320120168)

Late Triassic and Early Jurassic Ammonoids from Eastern Himalayas

YIN Jia-run1, LIU Gui-fang2,XIE Yao-wu3   

  1. 1School of Earth Sciences and Resources,China University of Geosciences, Beijing100083,China;
    2Institute of Geology,Chinese Academy of Geological Sciences, Beijing100037,China;
    3The Geological Survey Team of Tibetan Geological Exploring Bureau, Lhasa,Tibet851400,China
  • Received:2006-11-21 Revised:2006-12-27 Online:2007-01-20 Published:2007-01-20

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(Semicostatum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

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., Galaticeras 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.

Key words: eastern Himalayas, Tibet, Late Triassic, Early Jurassic, Ammonoids

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