古地理学报 ›› 2008, Vol. 10 ›› Issue (4): 379-384. doi: 10.7605/gdlxb.2008.04.006

• 生物古地理学及古生态 • 上一篇    下一篇


滦平盆地西瓜园组(上侏罗统—下白垩统)暗色泥岩中恐龙脚印化石及其地质意义

纪友亮孙玉花贾爱林   

  1. 1 中国石油大学(北京) 北京102249
    2 同济大学海洋与地球科学学院 上海200092
    3 中国石油勘探开发研究院 北京100083
  • 出版日期:2008-08-01 发布日期:2008-08-01
  • 作者简介:纪友亮,男,1962年生,中国石油大学(北京)教授,CNPC储集层重点实验室副主任,博士生导师,现从事石油地质学、沉积学和层序地层学方面的科研与教学工作。通讯地址:北京昌平府学路18号中国石油大学(北京);邮政编码:102249。
  • 基金资助:

    国家973科技攻关项目“中国典型叠合盆地隆坳格局形成演化与岩性地层圈闭发育模式”(编号:2006CB202302)资助

Dinosaur footprint fossils in dark mudstones of the  Xiguayuan Formation(Upper Jurassic-Lower Cretaceous)in LuanpingBasin and their geological significance

Ji YouliangSun YuhuaJia Ailin   

  1. 1 China University of Petroleum(Beijing) Beijing102249
    2 School of Ocean and Earth Science,Tongji University, Shanghai200092
    3 Research Institute of Petroleum Exploration and Development PetroChina Beijing100083
  • Online:2008-08-01 Published:2008-08-01
  • About author:Ji Youliang,born in 1962,is a professor of China University of Petroleum(Beijing),and a vice director of Key Laboratory of Reservoir of CNPC. Now he is mainly engaged in petroleum geology,sedimentology and sequence stratigraphy.

摘要:

通过对滦平盆地西瓜园组(上侏罗统—下白垩统)暗色泥岩和油页岩的岩相特征及其中所发现的各种恐龙脚印化石的研究,分析了恐龙脚印化石形成的环境。认为在前扇三角洲或深湖—半深湖环境的暗色泥岩中出现恐龙脚印化石,说明湖平面变化频繁,在枯水期,湖平面下降,前扇三角洲或深湖—半深湖相暗色泥岩暴露出水面,一些恐龙经过此处到低洼处喝水,留下脚印。由此推断中国东部古近纪陆相断陷湖盆中的暗色泥岩所夹的砂砾岩和盐岩并不全是深水重力流成因,暗色泥岩所夹的盐岩也不一定是深水成因;并建立了暗色泥岩中所夹的砂砾岩和盐岩的成因沉积模式。

Abstract:

By the study of different kinds of dinosaur footprint fossils found in the dark mudstones and oil shales of the Xiguayuan Formation(Upper Jurassic-Lower Cretaceous)  in Luanping Basin and the lithofacies characteristics of the dark mudstones and oil shales,the sedimentary environment of the dinosaur footprint fossils was analyzed. The dark mudstones  with dinosaur footprint fossils were deposited in semideep lake or front fan delta environments which indicated that the lake level changed frequently. During the dry season,the lake level fell,and the dark mudstones in deep lakesemideep lake facies exposed to the air. Some dinosaurs went to the lower part of the basin to drink water,and their footprints were left in the dark mudstones. Consequently, it is concluded that all the sandstone conglomerates interlayered in the dark mudstones and the salt rocks in the Paleogene continental faulted basins in eastern China are not formed by deep water gravity flow. The sedimentary models of the sandstone conglomerates and salt rocks interlayered in dark mudstones were established to show their origins.