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古地理学报 ›› 2003, Vol. 5 ›› Issue (1): 1-16. doi: 10.7605/gdlxb.2003.01.001

• 岩相古地理学及沉积学 •    下一篇

中国早奥陶世岩相古地理

冯增昭  彭勇民  金振奎  鲍志东   

  1. 石油大学，北京100083
  • 出版日期:2003-02-01 发布日期:2003-02-01
  • 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  EARLY  ORDOVICIAN  IN  CHINA

Feng Zengzhao  Peng Yongmin  Jin Zhenkui  Bao Zhidong   

  1. University of Petroleum, Beiing 100083
  • Online:2003-02-01 Published:2003-02-01
  • About author:Feng Zengzhao, born in 1926, 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：

本文是中国早、中和晚寒武世岩相古地理诸文的继续[1—3]。在笔者等的华北地区、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，结合其他地区的地质资料，编制出了中国早奥陶世早期和晚期岩相古地理图两幅，并撰写出本文。在华北地区，作图单位分早奥陶世早期和晚期，以冶里期和马家沟二期分别代表其早期和晚期。在华南地区，作图单位亦分早奥陶世早期和晚期，以新厂期和宁国期分别代表其早期和晚期。在西北地区和其他地区，作图单位均为早奥陶世，不分早期和晚期。华北地区、华南地区和西北地区研究程度较高，其岩相古地理图和相应的文字论述都是定量的和比较详细的。其他地区的研究程度较低，其岩相古地理图和文字论文都是定性的或概略性的。定量，即每个古地理单元的划分都有确切的定量资料和定量图件为依据。这种定量的岩相古地理图对石油、天然气以及其他矿产的预测和勘探最有用处。中国早奥陶世岩相古地理的基本格局仍和寒武纪各世的一样，是两槽和三台相间分布。两槽即天山北山蒙辽吉槽地和昆仑秦岭槽地，三台即准噶尔蒙兴台地、塔里木柴达木华北台地和西藏华南台地。这些古地理单元及其次级古地理单元的范围和特征，有些与晚寒武世或中及早寒武世的相同或基本上相同，有些则大不相同，这是由早奥陶世的大范围的海侵决定的。

Abstract:

 This paper is a continuation from Lithofacies Palaeogeography of the Early Cambrian in China ［1-3］. On the basis of the present writers' achievements of study and mapping of quantitative lithofacies palaeogeography of Cambrian and Ordovician in North China, South China and Northwest China, in combination with geological data of other areas, mainly Mongolia-Xinganling, Tibet, Hainan Island and Taiwan, through comprehensive analysis and judgment, the lithofacies palaeogeography maps of the Early Age and Late Age of Early Ordovician were compiled and this paper was finished. In these two maps, the lithofacies palaeogeography framework , i.e. "two troughs alternating with three platforms" in the Early, Middle and Late Cambrian was unchanged. The two troughs are the Tianshan-Beishan-Mongolia-Liaoning-Jilin Trough and Kunlun-Qinling Trough. The three platforms are the Junggar-Mongolia-Xinganling Platform, Tarim-Qaidam-North China Platform and Tibet-South China Platform. The scope of these 5 paleogeographic units are basically the same with those in the Early, Middle and Late Cambrian, but the characteristics of their second-rank palaeogeographic units are different from those of the Cambrian.