| 210Pb法在测定沉积速率中的应用 |
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| 引用本文： | 康兴伦,袁 毅,李培泉,纪正训,林炳兴,吴 辉,刘书田.210Pb法在测定沉积速率中的应用[J].海洋科学,1985,9(1):38-42. |
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| 作者姓名： | 康兴伦 袁 毅 李培泉 纪正训 林炳兴 吴 辉 刘书田 |
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| 作者单位： | 中国科学院海洋研究所
(康兴伦，袁毅，李培泉)，广东省测试分析研究所
(纪正训，林炳兴，吴辉)，中国科学院原子能研究所(刘书田) |
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| 摘 要： | ~(2l0)Pb是~(226)Ra衰变后的一个子体产物。~(210)Ra吸附到大气尘埃、气溶胶上,或吸附到兩、雪中,沉降下来,参与陆地水系的循环。海水中也有~(226)Ra,它同样也能衰变为~(210)Pb,因此,大气沉降、大陆径流和水体中~(226)Ra的衰变是海水中~(210)Pb的来源。~(210)Pb在海水中很容易被粘土和有机质悬浮颗粒吸附,或与铁
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THE DETERMINATION OF SEDIMENTATION RATE BY 210Pb METHOD |
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| Abstract: | The sedimentation rates at East-South part of Jiaozhou Bay and off the Belt of Dingzi Bay was determined with 210Po self-precipitation a spectrum method and 210Po self-precipitation a count method. Three layers are found in the sediment determined, the surface mixing layer, about 0-10 cm, with irregular activity distribution; the middle active decay layer with regular activity; the active background region with uniform activity. The sedimentation rate at East-South part of Jiaozhou Bay is 2.2 mm/year and the sedimentation rate off the delt of Dingzi Bay is 1.8mm/year. |
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