| 瑞士Greifen湖新近沉积物中的137Cs分布及其计年 |
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| 引用本文： | 万国江,P.Santschi,K.Farrenkothen,M.Sturm,W.Stumm.瑞士Greifen湖新近沉积物中的137Cs分布及其计年[J].环境科学学报,1985,5(3):360-365. |
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| 作者姓名： | 万国江 P.Santschi K.Farrenkothen M.Sturm W.Stumm |
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| 作者单位： | 中国科学院地球化学研究所
(万国江)，瑞士水资源和水污染控制研究所
(P.Santschi，K.Farrenkothen，M.Sturm)，瑞士水资源和水污染控制研究所(W.Stumm) |
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| 摘 要： | 于瑞士Greifen湖不同复水深度的位置,采集了直径为12cm的四个沉积物孔心样品,测得~(137)Cs的垂直剖面具相似的分布类型.由垂直剖面中~(137)Cs的峰值作沉积物计年标志得知:沉积物积累速度变化范围为0.22—0.085g/cm~2·a,随采样点与入湖的M(?)nch河口距离增加而递减.界面层沉积作用速率变化范围为1.4—0.55cm/a.显示出入湖泥沙输入和复水深度的双重影响.实际资料和理论概算表明.湖中的大部分~(137)Cs来自M(?)nch河积水盆地并在湖中得到净化.
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| 收稿时间： | 1/3/1985 12:00:00 AM |
DISTRIBUTION AND DATING OF 137Cs FOR RECENT SEDIMENTS IN LAKE GREIFEN (SWITZERLAND) |
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| Wan Guojiang,Santschi,P.,Farrenkothen,K.,Sturm,M. and Stumm,W..DISTRIBUTION AND DATING OF 137Cs FOR RECENT SEDIMENTS IN LAKE GREIFEN (SWITZERLAND)[J].Acta Scientiae Circumstantiae,1985,5(3):360-365. |
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| Authors: | Wan Guojiang Santschi P Farrenkothen K Sturm M and Stumm W |
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| Institution: | Institute of Geochemistry, Academia Sinica,Swiss Federal Institute For Water Resources and Water Pollution Control--EAWAG,Swiss Federal Institute For Water Resources and Water Pollution Control--EAWAG,Swiss Federal Institute For Water Resources and Water Pollution Control--EAWAG and Swiss Federal Institute For Water Resources and Water Pollution Control--EAWAG |
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| Abstract: | Cores from four locations in Lake Greifen, Switzerland, were chosen by difference in depth of overlying water in order to be representative of the sedimentation condition. The profile of 137Cs in each core shows similar distribution pattern for different locations in the lake. Based on the time marker of 137Cs peak, the sediment accumulation rate decreases with distance from Monch stream inlet, ranging from 0.22g/ cm2·a near the inlet to 0.085g/cm2·a farthest away, and yielding an average value of 0.14g/cm2·a. The sedimentation rate ranging from 1.4 to 0.55cm/a decreases with the depth of overlying water and appears to depend on both the input of silts and the depth of overlying water. The inventory of 137Cs varies between 18.3 to 4.4 pCi/cm2 in sediment cores. in a decreasing tendency similar to the sediment accumulation rate. The estimation indicates that most of 137Cs in sediments is derived from the Monch stream basin and purified in the Lake Greifen. The dating 137Cs is in good agreement with observed stratigraphic horizons and other studies. |
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