摘要
本文报道了用放射性同位素^(210)Pb 和^(137)C 两种计年方法对洱海沉积物的年代和沉积速率的研究结果。用γ谱仪分析了洱海3个沉积物柱样不同层位中^(210)Pb 和^(137)Cs 的含量,用两种方法得到平均沉积速率分别为0.21和0.20 cm/a。
This paper describes the determination of sedimemtation rate and dating of sedi-ment in Erhai Lake with the methods of radionuclides ^(210)Pb and ^(137)Cs dating.The evaluationsof sediment rate and years in Erhai Lake were described in this paper.Measurements of ^(210)Pband ^(137)Cs contents in sediment of various layers of three columu samples have been done byusing γ-spectrmetry method.The columu samples were taken from representetive sites bot-tom in Erhai Lake.The sedimentation,years and sedimentation rates of Erhai Lake are finallydetermined by ^(210)Pb and ^(137)Cs dating methods.The average sedimentation rate are 0.21 cm/aand 0.20 cm/a respectively.
出处
《辐射防护》
CAS
CSCD
北大核心
1993年第6期453-457,465,共6页
Radiation Protection
关键词
沉积物
沉积速率
洱海
地质年代
Sediments
Sedimentation Rate
Dating
Erhai
Environmental Background
