| 用~(210)Pb和~(239)Pu测定Saguenay湾的沉积速率 |
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| 引用本文： | 宋树林.用~(210)Pb和~(239)Pu测定Saguenay湾的沉积速率[J].海洋科学进展,1999(4). |
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| 作者姓名： | 宋树林 |
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| 作者单位： | 国家海洋局第一海洋研究所!青岛，266003 |
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| 摘 要： | 本文介绍了用２１０Ｐｂ 和２３９Ｐｕ 测定Ｓａｇｕｅｎａｙ 湾的沉积速率。在沉积物中过剩２１０Ｐｂ 的比活度随着深度的增加呈指数衰减。但在柱状样８２－０７２ 的４５ｃｍ 处和８２－１４７ 的６ｃｍ 处，过剩２１０Ｐｂ 的比活度发生突变。这可能与１９７１ 年发生的陆倾有关。用２１０Ｐｂ 方法测得柱状样８２－０７２ 和８２－１４７ 的沉积速率分别为３．５０ｃｍ ／ａ 和０．４９ｃｍ ／ａ，与用２３９Ｐｕ 方法测得的沉积速率３．６０ｃｍ ／ａ和０．５０ｃｍ ／ａ 基本是一致的。
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| 关 键 词： | Saguenay湾 指数衰减 沉积速率 |
Determining the Sedimentation Rate of Saguenay Fjord Using ~(210)Pb and ~(239)Pu |
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| Song Shulin.Determining the Sedimentation Rate of Saguenay Fjord Using ~(210)Pb and ~(239)Pu[J].Advances in Marine Science,1999(4). |
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| Authors: | Song Shulin |
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| Abstract: | This paper introduces a determination of the sedimentation rate of the sediments in Saguenay Fjord using 210 Pb and 239 Pu. The specific activities of the excess of 210 Pb in the sediments decrease exponentially with depths. But they change suddenly in the depth of 45cm for core 82 072 and 6cm for core 82 147. This phenomenon is related to the land slide which occurred in 1971. The sedimentation rates of core 82 072 and 82 147 determined by 210 Pb method are 3.50cm/a and 0.49 cm/a respectively, and are in accordance with the sedimentation rates of 3.60cm/a and 0.50 cm/a determined by 239 Pu method. |
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| Keywords: | Saguenay Fjord Exponential decrease Sedimentation rate |
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