| 豫西义马地区中—晚三叠世古地震引起的欠沉积物变形构造 |
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| 引用本文： | 杨文涛,汪校锋,杨江海,杜远生.豫西义马地区中—晚三叠世古地震引起的欠沉积物变形构造[J].古地理学报,2011,13(6):635-644. |
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| 作者姓名： | 杨文涛 汪校锋 杨江海 杜远生 |
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| 作者单位： | 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 |
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| 基金项目： | 河南省生物遗迹与成矿过程重点实验室开放基金项目，区域地质调查项目 |
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| 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...
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| 关 键 词： | 义马 秦岭造山带 软沉积物变形 三叠纪 河南省 |
| 收稿时间： | 2011-08-30 |
Soft-sediment deformation structures caused by palaeoearthquake in the Middle-Late Triassic in Yima area, western Henan Province |
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| Yang Wentao,Wang Xiaofeng,Yang Jianghai,Du Yuansheng.Soft-sediment deformation structures caused by palaeoearthquake in the Middle-Late Triassic in Yima area, western Henan Province[J].Journal of Palaeogeography,2011,13(6):635-644. |
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| Authors: | Yang Wentao Wang Xiaofeng Yang Jianghai Du Yuansheng |
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| Institution: | State Key Laboratory of Biogeology and Environmental Geology，;China University of Geosciences(Wuhan)，Wuhan 430074，Hubei |
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| 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. |
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| Keywords: | Yima Qinling Orogenic Belt soft-sediment deformation Triassic Henan Province |
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