地学前缘 ›› 2009, Vol. 16 ›› Issue (4): 31-39.

• 论文 • 上一篇    下一篇

西藏班公湖地区侏罗纪—白垩纪沉积及古海洋盆地的演化

谢国刚 莫宣学 赵志丹 董国臣   

  1. 1中国地质大学(北京) 地球科学与资源学院, 北京 100083
    2江西省地质矿产勘查开发局, 江西 南昌 330002
  • 出版日期:2009-08-01 发布日期:2009-08-01
  • 作者简介:谢国刚(1962—),男,博士研究生，教授级高级工程师，主要从事区域地质调查及研究工作。Email: xieg403@126.com
  • 基金资助:

    中国地质调查局项目“1∶25万日土县幅、喀纳幅（国内部分）区域地质调查”

JurassicCretaceous sedimentation and evolution of ancient oceanic basin in Bangong Lake Area, Tibet.

XIE Guo-Gang MO Xuan-Hua DIAO Zhi-Dan DONG Guo-Chen   

  1. 1China University of Geosciences(Beijing), Beijing 100083, China
    2Jiangxi Bureau of Geology and Mineral Exploration and Development, Nanchang 330002, China
  • Online:2009-08-01 Published:2009-08-01

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摘要：

在西藏1∶25万喀纳幅、日土县幅地质调查图成果的基础上,重建了班公湖—怒江结合带西段3个地层区的侏罗纪—早白垩世沉积地层序列,对地层纵向、横向序列变化和沉积环境进行对比分析,指出在侏罗纪—早白垩世时,班公湖—怒江中特提斯洋盆沉积与其南、北两侧大陆边缘沉积有明显差异;中特提斯海洋盆地演化经历了早—中侏罗世深海—半深海沉积、晚侏罗世—早白垩世残余海(洋)盆地沉积和晚白垩世残余海盆消亡等3个阶段。

关键词: 中特提斯;盆地演化;侏罗纪—白垩纪;班公湖—怒江结合带;西藏

Abstract:

 Based on the geological survey of 1∶250 000 scale in Kana and Ritu Areas, we recognized the vertical and horizontal variation of sedimentation, studied the sedimentary environment and reestablished the JurassicCretaceous sedimentary sequence in three strata areas of western Bangong LakeNujiang suture zone. It was specified that the sedimentation in Bangong LakeNujiang middle Tethys oceanic basin was clearly different from both the southern and northern continental margin of the ocean in JurassicCretaceous period. The evolution of the middle Tethys Oceanic basin can therefore be divided into three stages as earlymiddle Jurassic deepwater ocean, later Jurassic to early Cretaceous relict basin with shallowwater sedimentary rocks and later Cretaceous remnant oceanic basin withering away.

Key words: MesoTethys; basin evolution; JurassicCretaceous; Bangong LakeNujiang suture zone; Tibet

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