| 黄河济南以下河段某些异常地质作用及几种典型沉积构造研究 |
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| 引用本文： | 孙景耀,陈辉军,朱明春.黄河济南以下河段某些异常地质作用及几种典型沉积构造研究[J].沉积学报,2001,19(1):79-84. |
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| 作者姓名： | 孙景耀 陈辉军 朱明春 |
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| 作者单位： | 渤海石油实业公司 天津塘沽 300452 |
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| 基金项目： | 国家重大基础研究规划项目 !(编号 :G1 99990 4 360 3) |
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| 摘 要： | 黄河自 1972年发生首次断流以来,以后 2 6年间,发生断流年数就有 19年,近年则愈演愈裂。由此引发了一系列特殊的地质作用,我们称之为异常地质作用,如汛期高含沙河水骤涨骤落,致使下游河床淤积严重,且不断抬高、展宽,并向二级悬河发育;床底不稳、河道迁移频繁,心滩、边滩上水道发育;而断流期则风的作用明显,风蚀地貌发育。水风地质作用混合,相克相伴,构成了黄河三角洲极为复杂的地质景观。又因黄河以沉积细粒物质为主,在多种因素的综合控制下,其沉积物层面或层内发育的沉积构造具有独特性,如变形层理、泥沙钟乳、液化 (泄水 )构造、气胀构造、植物划痕构造、特殊波痕及特殊流痕等,是典型的沉积构造。正确识别和分析黄河断流后的异常地质作用及由其形成的沉积构造对古河流相分析有重要参考意义.
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| 关 键 词： | 异常地质作用 沉积构造 断流 黄河 |
| 文章编号： | 1000-0550(2001)01-0079-06 |
| 收稿时间： | 1999-03-30 |
| 修稿时间： | 1999年3月30日 |
Study of Some Abnormal Geological Processes and Abnormal Sed imentary Structures down from Jinan in Yellow River |
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| SUN Jing-yao,CHEN Hui-jun,ZHU Ming-chun.Study of Some Abnormal Geological Processes and Abnormal Sed imentary Structures down from Jinan in Yellow River[J].Acta Sedimentologica Sinica,2001,19(1):79-84. |
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| Authors: | SUN Jing-yao CHEN Hui-jun ZHU Ming-chun |
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| Institution: | Bohai Oil Company,Tanggu Tianjin 300452 |
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| Abstract: | The flow cutoff of the Yellow River has been occured twenty times out of twenty seven years since 1972.Recently ,the phenomena become more seriously.It has caused a number of special geological phenomena.We call them abnormal geological processes.For example,the heavy loaded flow changes greatly in flood period and makes downstream channel silting up seriously.Moreover,the channel is developing higher and wider constantly.Now it develops into two gade"hanging river"in some intervals.The river bed is getting unstable and the channel changes frequently.Drainage ditches develop in point bar and channel bar.But the wind action is obvious during water depleted period and wind induced phenomena are common.The flow and wind geological processes affect each other and build up complex geological phenomena in delta of Yellow River.On the other hand,the sediments are mainly fine asnd and mud.Under various conditions ,the sedimentary structures are particular at the bed plane and in situ,for example,deformed bedding ,muddy and sandy stalactite,liquefied (water draw off)structures,gas heave structures,plant engraved structures,special ripple marks and special rill marks etc.We should identify and analyse abnormal geological processes and abnormal sedimentary structures under the flow cutoff of Yellow River and it is important to analyse the fluvial facies. |
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| Keywords: | abnormal geological processes sedimentary structures flow cutoff and Yellow River |
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