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| 黄河源区日玛曲流域古堰塞湖的沉积特征及环境意义 | |
| 引用本文： | 陈有顺,魏海成,李善平,李伍福.黄河源区日玛曲流域古堰塞湖的沉积特征及环境意义[J].高原地震,2009,21(1):32-35. |
| 作者姓名： | 陈有顺 魏海成 李善平 李伍福 |
| 作者单位： | 1. 青海省地震局,青海,西宁,810001 2. 中国科学院青海盐湖研究所,青海,西宁,810001 3. 中国科学院青海盐湖研究所,青海,西宁,810001;青海省地质调查院,青海,西宁,810001 4. 青海省地质调查院,青海,西宁,810001 |
| 摘 要： | 在黄河源区支流日玛曲河谷发现第四纪湖相沉积，以含砾粉砂、粉砂、粘土互层组合为特征，形成河流的第一阶地基座。通过对该剖面野外岩性观测、^14C测年分析，探讨了古湖形成时代及成因，以及古湖发育时期周围的植被与环境。研究结果发现，古湖形成于3120aBP前后，可能属于地震堰塞湖，于640aBP以后出现决堤事件。 |
| 关 键 词： | 堰塞湖 日玛曲 黄河源区 |
SEDIMENTARY CHARACTERISTICS AND ENVIRONMENT OF THE ANCIENT DAMMED LAKE IN RIMAQU BASIN IN THE YELLOW RIVER SOURCE AREA |
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| CHEN Youshun,WEI Haicheng,LI Shanping,LI Wufu.SEDIMENTARY CHARACTERISTICS AND ENVIRONMENT OF THE ANCIENT DAMMED LAKE IN RIMAQU BASIN IN THE YELLOW RIVER SOURCE AREA[J].Plateau Earthquake Research,2009,21(1):32-35. | |
| Authors: | CHEN Youshun WEI Haicheng LI Shanping LI Wufu |
| Institution: | 1. Earthquake Administration of Qinghai Province, Xining 810001, China ; 2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences , Xining 810008, China; 3. Qinghai Institute of Geological Survey, Xining 810012, China) |
| Abstract: | A group of Quaternary gyttjor are discovered in Rimaqu basin in the Yellow River source area which formed the first terrace foundation, included gravel aleurite, aleurite and clay layer. The framing age, cause, vegetation and environment of the ancient dammed lake are discussed by lithologieal profile testing and 14C age determination. The results show that the ancient dammed lake formed about 3 200aBP, might be earthquake dammed lake, and it might burst its bank about 640aBP later. |
| Keywords: | Dammed lake Rimaqu The Yellow River source area |
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