J4 ›› 2009, Vol. 39 ›› Issue (3): 470-473.

• 地质与资源 • 上一篇    下一篇

松花湖沉积物137Cs和210Pb分布及沉积速率

郝立波1|刘海洋1,陆继龙1|孙淑梅2|潘志恒2|赵玉岩1   

  1. 1.吉林大学 地球探测科学与技术学院| 长春 130026;2.吉林省地质调查院|长春 130061
  • 收稿日期:2008-12-16 出版日期:2009-05-26 发布日期:2009-05-26
  • 通讯作者: 陆继龙(1973-),男,山东东平人,副教授,博士,主要从事地球化学教学与研究, E-mail:lujilong@sina.com
  • 作者简介:郝立波(1961-)|男|吉林敦化人|教授|主要从事地球化学教学与研究|E-mail:haolb@tom.com
  • 基金资助:

    中国地质调查局项目(12120105111208)

Vertical Distribution of 137Cs and 210Pb and Sedimentation Rate in Songhua Lake

HAO Li-bo1, LIU Hai-yang1,LU Ji-long1, SUN Shu-mei2, PAN Zhi-heng2|ZHAO Yu-yan1   

  1. 1.College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China;2.Jilin Geological Survey Institute, Changchun 130061, China
  • Received:2008-12-16 Online:2009-05-26 Published:2009-05-26

摘要:

松花湖沉积物柱心中存在3个明显的137Cs蓄积峰,分别是37 cm处的1964年蓄积峰、27 cm处的1971年蓄积峰和23 cm处的1975年蓄积峰。利用137Cs核素1964年和1975年对应蓄积峰计算的沉积速率分别为0.86 cm/a和0.71 cm/a。采用210Pb计年的常量初始浓度模式(CIC)计算的平均沉积速率为0.71 cm/a,两者估算的沉积速率吻合。松花湖1964-1975年间的沉积速率明显高于1975-2006年间的沉积速率。137Cs和210Pb计年方法的结合有助于提高沉积速率估算的准确性。

关键词: 210Pb, 137Cs, 沉积速率, 松花湖

Abstract:

Three distinct 137Cs peaks formed at 1964, 1971 and 1975, respectively. are recognized in the sediment core of Songhua Lake. Using 137Cs depths recorded in 1964 and 1975 as the datum levels, the sedimentation rate are calculated to be 0.86 cm/a and 0.71 cm/a, respectively. The average sedimentation rate is 0.71 cm/a calculated by CIC model of 210Pb dating, which showed a good agreement with the result calculated by the 137Cs. The sedimentation rate from 1964 to 1975 is higher than those from 1975 to 2006 in Songhua Lake.  The combination of 137Cs and 210Pb dating is meaningful in improving the estimating accuracy of the sedimentation rates.

Key words: 210Pb, 137Cs, sedimentation dating, Songhua Lake

中图分类号: 

  • X141
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