古地理学报 ›› 2011, Vol. 13 ›› Issue (6): 635-644. doi: 10.7605/gdlxb.2011.06.005

• 古地震 • 上一篇    下一篇

豫西义马地区中—晚三叠世古地震引起的软沉积物变形构造*

杨文涛 汪校锋 杨江海 杜远生   

  1. 中国地质大学(武汉)生物地质与环境地质国家重点实验室,湖北武汉 430074
  • 收稿日期:2011-08-30 修回日期:2011-09-08 出版日期:2011-12-01 发布日期:2011-12-01
  • 通讯作者: 通讯作者简介 杜远生,男,1958年生,中国地质大学(武汉)教授,博士生导师,主要从事造山带沉积地质学研究 E-mail:ywtao125@163.com
  • 作者简介:杨文涛,男,1984年生,中国地质大学(武汉)在读博士研究生,主要从事造山带沉积地质学研究。E-mail:ywtao125@163.com。
    通讯作者简介 杜远生,男,1958年生,中国地质大学(武汉)教授,博士生导师,主要从事造山带沉积地质学研究。E-mail:duyuansheng126@126.com。
  • 基金资助:
    河南省生物遗迹与成矿过程重点实验室开放基金项目(编号:OTMP1007)和区域地质调查项目(编号:1212011120766)联合资助

Soft-sediment deformation structures caused by palaeoearthquake in the Middle-Late Triassic in Yima area,western Henan Province

Yang Wentao, Wang Xiaofeng, Yang Jianghai, Du Yuansheng   

  1. State Key Laboratory of Biogeology and Environmental Geology,
    China University of Geosciences(Wuhan),Wuhan 430074,Hubei
  • Received:2011-08-30 Revised:2011-09-08 Online:2011-12-01 Published:2011-12-01
  • About author:Yang Wentao,born in 1984,is a Ph.D.candidate of China University of Geosciences(Wuhan)and is mainly engaged in the researches of sedimentology and geology of orogenic belt.E-mail: ywtao125@163.com.
    About the corresponding author Du Yuansheng,born in 1952,is a professor and Ph.D. supervisor of China University of Geosciences(Wuhan)and is mainly engaged in the researches of sedimentology and geology of orogenic belt.E-mail: duyuansheng126@126.com.

摘要: 豫西义马地区中—上三叠统发现大量软沉积物变形构造,包括柱状构造、枕状构造、负载构造和卷曲层理构造,它们大多保存在河流沉积的上部及湖泊三角洲沉积中。通过形态学、遗迹学及镜下薄片分析表明,这些软沉积物变形与沉积物液化有关,其中河—湖相快速沉积为沉积物液化创造了条件,古地震活动是它们形成的主要触发因素。对比该地区中三叠统油房庄组与上三叠统椿树腰组软沉积物变形组合特征,认为秦岭造山带初始造山时间应在中三叠世油房庄组沉积时期,更强烈的造山活动发生在晚三叠世。

关键词: 义马, 秦岭造山带, 软沉积物变形, 三叠纪, 河南省

Abstract: Soft-sediment deformation structures,which contain cylindrical structure,pillow structure,load structure and curly bedding structure,were largely preserved in the Middle-Upper Triassic in Yima region, western Henan Province.Most of them occurred in the upper part of fluvial and deltaic deposits,which represents fine-grain and more water-contained sediments.Although it is beneficial to liquefaction of sediments, the trigger of soft-sediment deformation structures is the palaeoearthquake activities from the Qinling Orogen.Comparison of soft-sediment deformation assemblages from the Youfangzhuang Formation with data from the Chunshuyao Formation reveals the initial orogeny of the Qinling Orogenic Belt happened in the later Middle Triassic and more intense activities in the Late Triassic.

Key words: Yima, Qinling Orogenic Belt, soft-sediment deformation, Triassic, Henan Province

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