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| 中国湖泊柱样沉积物中239+240Pu的来源与分布特征 | |
| 引用本文： | 黄亚楠,潘少明,刘志勇. 中国湖泊柱样沉积物中239+240Pu的来源与分布特征[J]. 地理科学, 2018, 38(3): 437-447. DOI: 10.13249/j.cnki.sgs.2018.03.014 |
| 作者姓名： | 黄亚楠 潘少明 刘志勇 |
| 作者单位： | 1.南京大学海岸与海岛开发教育部重点实验室,江苏 南京 210023 2.苏州大学放射医学与防护学院,江苏 苏州 215123 |
| 基金项目： | 国家重点研发计划项目（2016YFA0600502)、国家自然科学基金项目（41671466）资助 |
| 摘 要： | 针对当前中国湖泊柱样沉积物中239+240Pu的研究现状,对中国湖泊239+240Pu的来源、239+240Pu最大蓄积峰的年代以及239+240Pu在湖泊沉积物中的迁移行为进行了研究总结。结果表明：中国湖泊239+240Pu的主要来源于全球大气核试验沉降,湖泊沉积柱样中表层沉积物240Pu/239Pu均值为0.177±0.019;柱样240Pu/239Pu均值为0.177±0.008;柱样239+240Pu的沉积通量范围在7.45~240.6 MBq/km2之间,因湖泊所处沉积环境及纬度的差异而变化。湖泊柱样剖面中的239+240Pu的分布多呈单峰分布,湖泊沉积物中239+240Pu的最大蓄积峰位置改变可以忽略不计,239+240Pu最大蓄积峰具有时标价值。 |
| 关 键 词： | 湖泊 柱样沉积物 239+240Pu 240Pu/239Pu 沉积通量 |
| 收稿时间： | 2017-07-09 |
| 修稿时间： | 2017-10-08 |
The Source and Distribution Characteristic of 239+240Pu in Sediment Cores of Chinese Lakes |
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| Yanan Huang,Shaoming Pan,Zhiyong Liu. The Source and Distribution Characteristic of 239+240Pu in Sediment Cores of Chinese Lakes[J]. Scientia Geographica Sinica, 2018, 38(3): 437-447. DOI: 10.13249/j.cnki.sgs.2018.03.014 | |
| Authors: | Yanan Huang Shaoming Pan Zhiyong Liu |
| Affiliation: | 1.The Key Laboratory of Ministry Education of Coastal and Island Development, Nanjing University, Nanjing 210023, Jiangsu, China 2. School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, Jiangsu, China |
| Abstract: | China is a nation with numerous lakes; tracer studies of 239+240Pu have been carried out in 14 lakes. According to the research status of 239+240Pu in Chinese lakes, this article summarizes the source, the migration behavior of 239+240Pu and the age of the maximum accumulation peaks of 239+240Pu. The results show that 239+240Pu in lacustrine sediment cores of Chinese lakes are mainly derived from the global atmospheric nuclear tests, the mean value of 240Pu/239Pu was 0.177±0.019 in the surface sediments, the mean value 240Pu/239Pu was 0.177±0.008 in the all sediment cores. Because of the difference of lake sedimentary environment and latitude changes, the range of the 239+240Pu inventories of was 7.45-240.6 MBq/km2. The distribution characteristic of 239+240Pu in lacustrine sediment cores of Chinese lakes are mostly unimodal, and the migration of 239+240Pu in sediment cores can be neglected and the maximum accumulation peak of 239+240Pu has time scale value. |
| Keywords: | lake sediment cores 239+240Pu activity 240Pu/239Pu 239+240Pu inventory |
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