| 金沙江其宗河段河谷演化及其工程效应 |
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| 引用本文： | 罗永红,王运生,王自高,高建.金沙江其宗河段河谷演化及其工程效应[J].山地学报,2010,28(2). |
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| 作者姓名： | 罗永红 王运生 王自高 高建 |
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| 作者单位： | 1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川,成都,610059
2. 中国水电顾问集团昆明水电勘测设计研究院,云南,昆明,650051 |
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| 摘 要： | 金沙江其宗河段实地调研揭示:该河段共发育Ⅳ级阶地,其中Ⅳ级阶地卵砾石比Ⅲ级阶地的风化程度强得多;测年显示Ⅳ级阶地形成年代距今约80～90 ka,Ⅲ级阶地形成距今仅40～50 ka,取自zk204钻孔下部炭化木的14C测年为45 ka,这表明Ⅳ级阶地形成后,河谷一直下切到基覆界面,回填加积至现今Ⅲ级阶地的高度,然后又重新下切,形成Ⅲ级、Ⅱ级及Ⅰ级阶地,在形成程式上与川西河谷演化有较为明显的差异.由于河床覆盖层中、下部形成于晚更新世,具有超固结效果,不但承载力高而且不具有液化性.
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| 关 键 词： | 金沙江 其宗河段 测年 河谷演化 工程效应 |
A Study on Evolution and Engineering Effect of Qizong River Section Valley of Jinsha River |
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| LUO Yonghong,WANG Yunsheng,WANG Zigao,GAO Jian.A Study on Evolution and Engineering Effect of Qizong River Section Valley of Jinsha River[J].Journal of Mountain Research,2010,28(2). |
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| Authors: | LUO Yonghong WANG Yunsheng WANG Zigao GAO Jian |
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| Institution: | LUO Yonghong1,WANG Yunsheng1,WANG Zigao2,GAO Jian2(1.State Key Laboratory of Geological Hazards Prevention,Chengdu University of Technology,Chengdu 610059,China,2.Kunming Hydropower Institute of Exploration , Design,China Hydropower Consult Group,Kunming 650051,China) |
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| Abstract: | Through spot investigation of Qizong River Section of Jinsha River valley,four terraces were recognized. Great difference of weathering degree between the fourth terrace and the third terrace. The weathering degree of the former is more serious than the latter. Age determination shows that the formation age of the fourth terrace about 80~90 kilo-years before present,but the third terrace age is just about 40 kilo-years. 14C age of the carbonized wood in zk204 drilling shows 45 kilo-years before the present.... |
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| Keywords: | Jinsha River Qizong River Section time dating evolution of valley engineering effect |
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