古地理学报 ›› 2006, Vol. 8 ›› Issue (4): 427-439.

• 岩相古地理学及沉积学 •    下一篇

塔里木地区寒武纪岩相古地理

冯增昭, 鲍志东, 吴茂炳, 金振奎, 时晓章   

  1. 中国石油大学(北京),北京100083
  • 收稿日期:2006-03-10 修回日期:2006-04-03 出版日期:2006-08-01 发布日期:2006-08-01
  • 作者简介:冯增昭,1926年生,1952年毕业于清华大学地质系,现为中国石油大学(北京)教授,主要从事沉积学及古地理学的教学及科研工作。
  • 基金资助:
    *中国石油天然气总公司科研计划正式项目“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)最终成果的一部分

Lithofacies palaeogeography of the Cambrian in Tarim area

Feng Zengzhao, Bao Zhidong, Wu Maobing, Jin Zhenkui, Shi Xiaozhang   

  1. China University of Petroleum (Beijing), Beijing 100083
  • Received:2006-03-10 Revised:2006-04-03 Online:2006-08-01 Published:2006-08-01
  • About author:Feng Zengzhao, born in 1926, graduated from Tsinghua University in 1952 Now he is a professor at China University of Petroleum (Beijing), and is engaged in sedimentology and paleogeography.

摘要: 塔里木地区是以当今的塔里木盆地为主体并包括其周边山地的广大地区,北至中天山,南至西昆仑山,西至我国国界,东至阿尔金山,面积逾 100万km2。在39个露头剖面和钻井剖面的各种单因素定量及定性资料的基础上,采用单因素分析多因素综合作图法,编制出了塔里木地区寒武系下、中、上统的各种单因素图及相应的寒武纪早、中、晚世的岩相古地理图。这些岩相古地理图最主要的特征是定量,即每个古地理单位的划分和确定都有确切的定量资料与定量的单因素图。这种定量的岩相古地理图在塔里木地区还是首次出现。在早寒武世,塔里木地区是一个碳酸盐岩台地,其中散布着准滩、云坪和膏盐湖。其北侧和东北侧是南天山和塔东硅岩石灰岩泥岩盆地。其南侧是昆仑台地,其中有2个小陆地。其东南侧有阿尔金陆。中寒武世和晚寒武世的岩相古地理格局与早寒武世相似,但陆地面积逐渐缩小,盆地面积逐渐扩大,塔里木碳酸盐岩台地变化不大。从早寒武世到晚寒武世是一个逐渐的海进过程。

关键词: 塔里木地区, 寒武纪, 岩相古地理, 单因素分析多因素综合作图法, 定量

Abstract: The Tarim area in this paper refers to the present Tarim Basin and its surrounding mountains, bounded on the north by the Middle Tianshan Mountains, on the south by the Kunlun Mountains, on the west by boundary line of our country, and on the east by the Altun Mountains. It covers an area of more than 1 000 000 km2. Based on the quantitative and qualitative data from the study of stratigraphy and petrology of outcrops and well sections, according to the single factor analysis and multifactor comprehensive mapping method, the single factor maps of the Lower, Middle and Upper Cambrian, and the lithofacies paleogeography maps of the Early, Middle and Late Cambrian of Tarim area, are compiled. The most important character of these lithofacies paleogeography maps is quantification. Quantification means that the determination of each paleogeography unit is based on the accurate quantitative data and the quantitative single factor maps. It is the first time to apply this quantitative method in the Tarim area In the Barly Cambrian, the Tarim area was mainly a carbonate platform, in which there were penebanks, dolomitic flat, and gypsum halite lake. The South Tianshan Basin and East Tarim Basin were siliceous rock-limestone-mudstone basin. The Kunlun Plat form was situated in the south, in which there were two small lands The Altun Land was situated in the southeast In the Middle and Late Cambrian, similar to the lithofacies paleogeographic pattern of the Early Cambrian, the land area was gradually reduced, the basin area was enlarged, while the Tarim carbonate platform changed little . The transgression continued from the Early Cambrian to the Late Cambrian.

Key words: Tarim area, Cambrian, lithofacies paleogeography, single factor analysis and multifactor comprehensive method, quantification

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