古地理学报 ›› 2015, Vol. 17 ›› Issue (5): 645-652. doi: 10.7605/gdlxb.2015.05.053

• 岩相古地理学及沉积学 • 上一篇    下一篇

内蒙古东乌旗地区中下泥盆统泥鳅河组沉积相研究

杜叶龙1,2,程银行2,李艳锋2,李敏2,胡晓佳2,张永2,张天福2,牛文超2   

  1. 1 合肥工业大学图书馆, 安徽合肥 230009;
    2 中国地质调查局天津地质调查中心,天津 300170
  • 收稿日期:2014-04-29 修回日期:2014-07-25 出版日期:2015-10-01 发布日期:2015-10-01
  • 作者简介:杜叶龙,男,1985年生。2012年毕业于合肥工业大学,获博士学位。现主要从事沉积学和区域地质研究工作。E-mail: longyi258015310@163.com。
  • 基金资助:
    中国地质调查项目《内蒙古1︰5万奥尤特、东方红公社、才伦郭少、巴彦都兰、东乌旗农场、石灰窑幅区域地质矿产调查》(编号:1212011220446)资助

Sedimentary facies of the Middle-Lower Devonian Niqiuhe Formationin East Ujimqin Qi of Inner Mongolia

Du Yelong1,2, Cheng Yinhang2, Li Yanfeng2, Li Min2, Hu Xiaojia2,Zhang Yong2, Zhang Tianfu2, Niu Wenchao2   

  1. 1 Labrary of Hefei University of Technology, Hefei 230009, Anhui;
    2 Tianjin Center of China Geological Survey,Tianjin 300170
  • Received:2014-04-29 Revised:2014-07-25 Online:2015-10-01 Published:2015-10-01
  • About author:Du Yelong,born in 1985,obtained his doctor degree from Hefei University of Technology in 2012. Now he is mainly engaged in sedimentology and regional geology. E-mail: longyi258015310@163.com.

摘要: 发育于内蒙古东乌旗地区的泥鳅河组,属于早中泥盆世沉积,厚度约1000m,主要发育泥岩、粉砂岩和灰岩沉积,粉砂岩中常常发育大量腕足类和珊瑚生物化石。首次在本区发现风暴沉积和Beaconites遗迹化石:风暴沉积由下至上包括粒序层理段、平行层理段、丘状交错层理段和浪成波纹层理段4个层段;Beaconites遗迹化石具管壁和内部水平“V”字型的回填纹构造。通过对岩相、生物化石、风暴沉积和Beaconites遗迹化石的研究显示,东乌旗地区泥鳅河组为浅海相沉积。

关键词: 泥鳅河组, 中下泥盆统, 沉积相, 风暴沉积, Beaconites遗迹化石, 东乌旗, 内蒙古

Abstract: The Middle-Lower Devonian Niqiuhe Formation,with about 1000m thick,developed at the East Ujimqin Qi of Inner Mongolia. It mainly consists of mudstone,siltstone and limestone. A great deal of brachiopoda and coral fossils are often found in the siltstone. Storm deposit and the trace fossil of Beaconites were found for the first time. The storm deposits consist from the bottom to the top of four segments,namely graded bedding,parallel bedding,hummocky cross-bedding and wavy bedding. Beaconites is characterized by pipe wall and horizontal “V”back-packing structure. The research of petrofacies,fossils,storm deposits and Beaconites shows that the Niqiuhe Formation in East Ujimqin Qi area belongs to shallow sea facies.

Key words: Niqiuhe Formation, Middle-Lower Devonian, sedimentary facies, storm deposit, Beaconites trace fossil, East Ujimqin Qi, Inner Mongolia

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