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古地理学报 ›› 2016, Vol. 18 ›› Issue (2): 207-219. doi: 10.7605/gdlxb.2016.02.016

• 岩相古地理学及沉积学 • 上一篇    下一篇

塔里木盆地巴楚地区上奥陶统碳酸盐岩岩石学特征及沉积环境

牛君1,2,3,黄文辉1,2,3,王鑫1   

  1. 1 中国地质大学(北京)能源学院,北京 100083;
    2 中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室,北京 100083;
    3 中国地质大学(北京)页岩气勘察与评价国土资源部重点实验室,北京 100083
  • 收稿日期:2015-07-06 出版日期:2016-04-01 发布日期:2016-04-01
  • 通讯作者: 黄文辉,男,1961年生,教授,主要从事沉积学研究。E-mail: huangwh@cugb.edu.cn。
  • 作者简介:牛君,女,1986年生,中国地质大学(北京)能源学院博士研究生,主要从事沉积学研究。E-mail: niujunmm@126.com。

Carbonate petrological characteristics and sedimentary environment of the Upper Ordovician in Bachu area, Tarim Basin

Niu Jun1, 2, 3, Huang Wenhui1, 2, 3, Wang Xin1   

  1. 1 School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083;
    2 Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism, Education Ministry,China University of Geosciences(Beijing),Beijing 100083
    3 Key Laboratory of Shale Gas Exploration and Evaluation,Ministry of Land and Resources, China University of Geosciences(Beijing),Beijing 100083
  • Received:2015-07-06 Online:2016-04-01 Published:2016-04-01
  • Contact: Huang Wenhui,born in 1961,is a professor of China University of Geosciences(Beijing). He is engaged in sedimentology. E-mail: huangwh@cugb.edu.cn.
  • About author:About the first author Niu Jun,born in 1986,is a Ph.D. candidate in China University of Geosciences(Beijing). She is engaged in sedimentology. E-mail: niujunmm@126.com.About the corresponding author Huang Wenhui,born in 1961,is a professor of China University of Geosciences(Beijing). He is engaged in sedimentology. E-mail: huangwh@cugb.edu.cn.通讯作者简介 黄文辉,男,1961年生,教授,主要从事沉积学研究。E-mail: huangwh@cugb.edu.cn。中图分类号:TE121.3+2 文献标志码: A

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摘要： 根据野外地质剖面宏观分析及室内薄片鉴定,对塔里木盆地巴楚地区上奥陶统吐木休克组和良里塔格组进行碳酸盐岩岩石组分、岩石类型及沉积环境分析。研究认为这2个地层单元具有不同的生物组合、颗粒成分、基质类型及其结构。吐木休克组岩石类型较为单一,主要为介形虫和三叶虫富集的泥晶生屑灰岩;良里塔格组岩石类型较多,包括似球粒藻粘结岩、泥晶生屑灰岩、亮晶砂屑灰岩、泥晶似球粒灰岩和纹层状叠层粘结岩等12种岩石类型。根据岩石学特征及野外露头分析认为,吐木休克组沉积于礁前上斜坡环境,而良里塔格组发育开阔台地相、局限台地相和生物礁相等,反映沉积环境水体相对较浅。研究区Ⅰ号和Ⅱ号剖面间发育台地边缘礁相,由南向北发育3个藻礁。

关键词: 塔里木盆地, 巴楚地区, 吐木休克组, 良里塔格组, 碳酸盐岩, 岩石类型, 沉积环境

Abstract: Combined with the profile measurements in the field and the indoor thin section identification,this paper conducts rock components, petrological types and sedimentary environment analysis of carbonate rocks of the Upper Ordovician Tumuxiuke Formation and Lianglitage Formation in Bachu area of Tarim Basin. The results show that the two stratigraphic units have difference in fossil assemblages,granular components and matrix types and texture. The petrological type of Tumuxiuke Formation is only micritic￣bioclastic limestone composed of Ostracodas and Trilobites, while twelve types in Lianglitage Formation are recognized such as pelletoid-algal limestone,intraspararenite,sparry sand￣sized intraclast limestone,algal limestone,micritic limestone with bilclasts and pelletoidal limestone. According to the analysis of petrological types and outcrop observing,the Tumuxiuke Formation carbonate rocks were mainly formed in reef-front slope, while the Lianglitage Formation carbonate rocks were formed in open platform and organic reefs,implying a relatively shallow sedimentary environment. Organic reef facies of platform margin were developed between No.Ⅰ section and No.Ⅱ section,with three algal reefs arranged in turn from south to north.

Key words: Tarim Basin, Bachu area, Tumuxiuke Formation, Lianglitage Formation, carbonate rock, petrological type, sedimentary environment

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