• 中文核心期刊
  • 中国科技核心期刊
  • CSCD收录期刊
  • 美国《化学文摘》收录期刊
  • Scopus数据库收录期刊
高级检索

济源盆地中侏罗统马凹组砂岩粒度特征分析

李明龙, 郑德顺, 龚文磊, 周璐, 程涌

李明龙, 郑德顺, 龚文磊, 周璐, 程涌. 济源盆地中侏罗统马凹组砂岩粒度特征分析[J]. 沉积与特提斯地质, 2013, 33(2): 25-31.
引用本文: 李明龙, 郑德顺, 龚文磊, 周璐, 程涌. 济源盆地中侏罗统马凹组砂岩粒度特征分析[J]. 沉积与特提斯地质, 2013, 33(2): 25-31.
LI Ming-long, ZHENG De-shun, GONG Wen-lei, ZHOU Lu, CHENG Yong. Grain size analysis for the sandstones from the Middle Jurassic Ma'ao Formation in the Jiyuan Basin, Henan[J]. Sedimentary Geology and Tethyan Geology, 2013, 33(2): 25-31.
Citation: LI Ming-long, ZHENG De-shun, GONG Wen-lei, ZHOU Lu, CHENG Yong. Grain size analysis for the sandstones from the Middle Jurassic Ma'ao Formation in the Jiyuan Basin, Henan[J]. Sedimentary Geology and Tethyan Geology, 2013, 33(2): 25-31.

济源盆地中侏罗统马凹组砂岩粒度特征分析

基金项目: 

国家自然科学基金项目(40902033)、河南理工大学博士基金项目(B2009-93)

详细信息
    作者简介:

    李明龙(1988-),男,硕士研究生,沉积学专业。E-mail:leeminglong@126.com

    通讯作者:

    郑德顺(1977-),男,博士(后),副教授,从事构造-沉积响应及油气地质教学研究工作。E-mail:zhengdeshun@126.com

  • 中图分类号: P512.2

Grain size analysis for the sandstones from the Middle Jurassic Ma'ao Formation in the Jiyuan Basin, Henan

  • 摘要: 济源盆地中侏罗统马凹组下段发育厚约80m的中细粒砂岩,前人在许多文献中称其为长石石英砂岩。通过对所取砂岩样品薄片镜下观察,将其命名为岩屑石英砂岩。该段砂岩自下而上粒度具有以下特征:平均粒径(Mz)总体由大变小,标准偏差(σ)反映砂岩分选由中等逐渐变好,标准偏差(σ)和偏度(SK1)都具有典型河流沉积物特征。频率曲线表现为不对称三峰或双峰,概率累积曲线由"低斜四段"式渐变为"高斜跳悬两段"式。该套砂岩沉积时期水流不稳,有多期洪流出现,表现为平均粒径和标准偏差的局部来回振荡。其C-M图显示主要发育牵引流PQ、QR、RS段,符合经典曲流河沉积模式。
    Abstract: About 80-m thick medium-to fine-grained sandstones are recognized in the lower member of the Middle Jurassic Ma'ao Formation in the Jiyuan Basin, Henan, and previously were considered as the feldspathic quartz sandstones in many literatures. The authors in the present paper redetermined them as lithic quartz sandstones. These sandstones become progressively smaller in mean grain size (Mz) and better in sorting. Moreover, the standard deviation (σ) and skewness (SKI) for the sandstones suggest the typical features of the fluvial deposits. The frequency curves display asymmetrical bimodal or trimodal patterns, and the probability cumulative curves display the gradations from "low oblique four-part" patterns to the " high oblique two-part" patterns. Multiphase floods during the deposition of the sandstones are responsible for the partial oscillation of the mean grain sizes and standard deviations. In addition, the occurrence of the PQ, QR and RS intervals of the tractional currents indicated in the CM patterns also shows the classical patterns of the meandering stream deposits.
计量
  • 文章访问数:  106
  • HTML全文浏览量:  0
  • PDF下载量:  104
  • 被引次数: 0
出版历程
  • 收稿日期:  2012-06-20
  • 修回日期:  2012-08-08
  • 发布日期:  2013-06-29

目录

    /

    返回文章
    返回