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地理科学  2002 

滇西和黔中表土中7Be与137Cs分布特征对比研究

, PP. 43-48

Keywords: 137Cs与7Be,散落与蓄积,表土,滇西与黔中

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Abstract:

滇西和黔中28个表土剖面分层土样7Be、137Cs比活度对比分析可见滇西地区表土层顶部7Be/137Cs为100~1000,而黔中地区仅10~100;两地区表土层中7Be的表观比活度和最大渗透深度总体相近;137Cs在黔中表土层中的比活度总体较滇西地区略高.而黔中表土中7Be累计值的偏低现象,映射了该地区强烈的水土流失.为解释滇西和黔中地区之间表土层顶部7Be/137Cs的地区差异,需进一步讨论两核素的湖泊沉积物蓄积特征.

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