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古地理学报 ›› 2020, Vol. 22 ›› Issue (3): 428-439. doi: 10.7605/gdlxb.2020.03.029

• 岩相古地理学及沉积学 • 上一篇    下一篇

断陷盆地拗陷期河流层序样式及其地貌响应:以渤海湾盆地沙垒田凸起区新近系明化镇组下段为例*

谈明轩1,2,3, 朱筱敏2,3, 张自力2,3, 刘强虎4, 石文龙5   

  1. 1 河海大学海洋学院,江苏南京 210098;
    2 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249;
    3 中国石油大学(北京)地球科学学院,北京 102249;
    4 中国地质大学(武汉)资源学院,湖北武汉 430074;
    5 中海石油(中国)有限公司天津分公司,天津 300452
  • 收稿日期:2020-03-06 修回日期:2020-04-09 出版日期:2020-06-01 发布日期:2020-06-06
  • 通讯作者: 朱筱敏,男,1960年生,教授、博士生导师,主要从事沉积学与层序地层学教学与科研工作。E-mail: xmzhu@cup.edu.cn。
  • 作者简介:谈明轩,男,1990年生,河海大学讲师,主要从事沉积学及海洋地质学教学与科研工作。E-mail: mxtan@hhu.edu.cn。
  • 基金资助:
    *中央高校基本业务费项目(编号: 2019B06314)和国家重大科技专项(编号: 2017ZX05001-002-002)联合资助

Fluvial sequence pattern and its response of geomorphy in depression phase of rift basin: A case study of the Lower Member of Neogene Minghuazhen Formation in Shaleitian Uplift area, Bohai Bay Basin

Tan Ming-Xuan1,2,3, Zhu Xiao-Min2,3, Zhang Zi-Li2,3, Liu Qiang-Hu4, Shi Wen-Long5   

  1. 1 College of Oceanography,Hohai University,Nanjing 210098,China;
    2 State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing), Beijing 102249,China;
    3 College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;
    4 Faculty of Earth Resources,China University of Geosciences(Wuhan), Wuhan 430074,China;
    5 Tianjin Branch of CNOOC Ltd., Tianjin 300452, China
  • Received:2020-03-06 Revised:2020-04-09 Online:2020-06-01 Published:2020-06-06
  • Contact: Zhu Xiao-Min,born in 1960,is a professor and Ph.D. tutor. He is mainly engaged in teaching and researches on sequence stratigraphy and sedimentology. E-mail: xmzhu@cup.edu.cn.
  • About author:About the first author Tan Ming-Xuan,born in 1990,is a lecturer. He is mainly engaged in teaching and researches on sedimentology and marine geology. E-mail: mxtan@hhu.edu.cn.
  • Supported by:
    Co-funded by the Fundamental Research Funds for the Central Universities(No.2019B06314),and the National Science and Technology Major Project(No.2017ZX05001-002-002)

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摘要： 对于断陷盆地拗陷期远离滨岸的河流而言,其层序划分是层序地层学研究的难点。本研究在已有钻测井、岩心及地震资料分析基础上,以渤海湾盆地沙垒田凸起区新近系明化镇组下段(简称“明下段”)作为研究对象,将其划分为1个完整的三级层序、4个四级层序(即SQm1-SQm4)。沉积间断面、宽浅下切谷及复合连片砂体是该地区河流层序界面重要的识别标志。每个四级层序均由低可容空间和高可容空间体系域组成。地震地貌学定量分析表明,低可容空间体系有利于低弯度河流(辫状河、低弯度曲流河)发育,高可容空间体系域有利于中高弯度河流发育。新增可容空间和沉积物供给速率的变化对于河流不同体系域的砂体样式具有重要控制作用。

关键词: 河流层序, 下切谷, 河流地貌, 明化镇组, 沙垒田凸起区, 渤海湾盆地

Abstract: The sequence classification is a difficulty of sequence stratigraphic study on rivers that are distal to coast area during the depression phase of rift basin. Based on the integrated analysis of logging,cores and seismic data,the case study shows that the Lower Member of Neogene Minghuazhen Formation in the Shaleitian Uplift area in the western Bohai Sea region corresponds to one complete third-order sequence which can be divided into four fourth-order sequences(i.e. SQm1-SQm4). Sedimentary hiatus,wide and shallow incised valley and amalgamated channel sand bodies are the main recognition of sequence boundaries in fluvial sequence stratigraphy of the study area. Each fourth-order sequence comprises low and high accommodation systems tracts. According to seismic sedimentological and quantitative geomorphological analysis,low-sinuosity rivers including braided river and low-sinuosity meandering river are well developed in the low accommodation systems tract,whereas the medium- to high-sinuosity meandering rivers are well preserved in the high accommodation systems tract. The change in the new creation of accommodation and the sediment supply exert a significant control on the stacked pattern within different systems tracts.

Key words: fluvial sequence, incised valley, fluvial geomorphy, Minghuazhen Formation, Shaleitian Uplift area, Bohai Bay Basin

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