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古地理学报 ›› 2004, Vol. 6 ›› Issue (2): 127-139. doi: 10.7605/gdlxb.2004.02.001

• 岩相古地理学及沉积学 •    下一篇

中国晚奥陶世岩相古地理

冯增昭 彭勇民 金振奎 鲍志东   

  1. 石油大学 北京100083
  • 出版日期:2004-04-01 发布日期:2004-04-01
  • 作者简介:冯增昭，男，1926年生，1952年毕业于清华大学地质系，现为石油大学（北京）教授，博士生导师，长期从事沉积学及岩相古地理学教学和科研工作。
  • 基金资助:

    本文是作者冯增昭承担的中国石油天然气总公司科研正式项目“中国寒武纪和奥陶纪岩相古地理研究及编图”(94科字第69号)的最终成果的一部分

Lithofacies palaeogeography of the Late Ordovician in China

Feng Zengzhao  Peng Yongmin  Jin Zhenkui  Bao Zhidong   

  1. University of Petroleum, Beijing 100083
  • Online:2004-04-01 Published:2004-04-01
  • About author:Feng Zengzhao，born in 1926，was graduated from the Geology Department of Tsinghua University in 1952Now he is a professor in University of Petroleum （Beijing)，and is engaged in sedimentology and palaeogeography

摘要：

本文是笔者等的中国早、中、晚寒武世和早、中奥陶世岩相古地理诸文的继续。在对华北地区、华南地区和西北地区寒武纪和奥陶纪定量岩相古地理研究及编图成果的基础上，结合其他地区（主要是蒙兴地区、昆仑秦岭地区、西藏地区、海南岛和台湾地区）的地质资料，编制出了中国晚奥陶世岩相古地理图，并撰写出本文。华北地区、华南地区和西北地区的研究程度较高，其岩相古地理图和文字论述都是定量的。其他地区的研究程度较低，其岩相古地理图和文字论述则是定性的或概略性的。在中国晚奥陶世，早、中、晚寒武世和早、中奥陶世一直存在的“两槽和三台相间分布”的岩相古地理基本格局已经改变，天山北山蒙辽吉槽地中的北山槽地和蒙辽吉槽地已不再是槽地而变成了台地。因此，准噶尔台地、北山台地、蒙兴台地、蒙辽吉台地和华北台地就连在一起了，形成了一个庞大的北方台地群。这是一个重大变化。其他古地理单元也与以前各世的大不相同或有所不同。这是晚奥陶世晚期大规模海退的结果。

Abstract:

This paper is a continuation of the papers on lithofacies palaeogeography of the Early，Middle and Late Cambrian and the Early and Middle OrdovicianIt is based on the present writers'achievements of study and mapping of quantitative lithofacies palaeogeography of the Cambrian and Ordovician in North China，South China and Northwest ChinaOn such a basis，in combination with geological data of other areas，mainly MongoliaXing'anling，KunlunQinling，Tibet，Hainan Island and Taiwan areas，through comprehensive analysis and judgement,the lithofacies palaeogeography map of the Late Ordovician in China is compiled and this paper is completedIn this paper，the lithofacies palaeogeography in North China，South China and Northwest China is quantitative and the description is in detail，while the lithofacies palaeogeography in other areas is qualitative and the description is generalIn the Late Ordovician，the lithofacies palaeogeography framework of“two troughs alternating with three platforms”in the Early，Middle and Late Cambrian and the Early and Middle Ordovician was changedThe Beishan Trough and MongoliaLiaoningJilin Trough were no longer troughs and were changed to platformsTherefore the Junggar Platform，Beishan Platform,MongoliaXing'anling Platform，MongoliaLiaoningJilin Platform and North China Platform were united together，and became a great group of platformsThe other palaeogeographic units were also changed and were different from those in the previous agesThis was the result from the largescale regression in the Late Ordovician