| 高容重黏性泥石流沉积的组成和构造反映的搬运和沉积动力特征 |
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| 引用本文： | 刘耕年,李建江,鞠远江,崔之久.高容重黏性泥石流沉积的组成和构造反映的搬运和沉积动力特征[J].水土保持研究,2003,10(3):1-2,7. |
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| 作者姓名： | 刘耕年 李建江 鞠远江 崔之久 |
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| 作者单位： | 北京大学环境学院资源与环境地理系, 北京, 100871 |
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| 基金项目： | 国家自然科学基金资助(90102016,40271014). |
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| 摘 要： | 通过地貌形态、粒度分析和定向样品切片分析等资料探讨查菁沟泥石流的沉积特征及其反映的泥石流动静力学特征.砾石的含量下游较少,砂的含量由下游向上游减少,大于4mm碎屑向顶层减少,黏土相反.容重总平均值由下游向上游逐渐增加,横剖面中容重有由下向上的增加的趋势.定向切片的纵剖面中粗大碎屑反映出由底向顶倾角增大的特点,优势倾向上游;横剖面显示主流线两侧的碎屑以向主流线(向内)倾斜为主,构成一种“向心状”构造.沉积主体表现为混杂构造,底部多表现为纹层理构造,表现出底部层流,上部塞流特点.
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| 关 键 词： | 高容重 黏性 泥石流 沉积 |
| 文章编号： | 1005-3409(2003)03-0001-02 |
Sedimentary Composition and Structure Showing the Transportation and Deposition Processes of High Density Viscous Debris Flows |
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| LIU Geng-nian,LI Jian-jiang,JU Yuan-jiang,CUI Zhi-jiu.Sedimentary Composition and Structure Showing the Transportation and Deposition Processes of High Density Viscous Debris Flows[J].Research of Soil and Water Conservation,2003,10(3):1-2,7. |
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| Authors: | LIU Geng-nian LI Jian-jiang JU Yuan-jiang CUI Zhi-jiu |
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| Institution: | Geography Department, College of Environmental Sciences, Peking University, Beijing, 100871, China |
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| Abstract: | Landforms,grain sizes and structure observation by microscope shows that deposits of high density viscous debris flow reflect the behavior of basal laminar flow and upper plunger flow.There are more gravels and sands in the down stream than in upper stream.Clay content decreases from down stream to upper stream.The volume content increase from down stream to upper stream.Sedimentary structures show regular fabric in longitudinal and transverse section. |
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| Keywords: | high density viscous debris flow deposit |
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