| Pre-nuclear level of I-129 in Chinese loess-paleosol sections: A search for the natural I-129 level for dating in terrestrial environments | |
| Fan, Yukun1,2; Zhou, Weijian1,2,3; Hou, Xiaolin1,2 | |
| 2018-06-15 | |
| 发表期刊 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 卷号 | 231期号:4页码:64-72 |
| 文章类型 | Article |
| 摘要 | Due to its long half-life (15.7 Myr), radioactive I-129 has great potential for dating geologic materials as old as 100 Myr. Thus, knowing the natural level of I-129 is crucial to dating applications. The initial ratio of I-129/I-127 in the ocean has been quantified by a number of researchers who have reached a consensus value. However, the applicability of I-129 dating in the terrestrial environment remains problematic because the lack of an initial I-129/I-127 value. In this work, samples of loess-paleosol sections from the Chinese Loess Plateau (CLP) were analyzed for I-129/I-127, aiming to provide an Initial I-129/I-127 ratio that can be adopted for dating purposes in terrestrial environments. A value of (2.0 +/- 1.0) x 10(-11) for the I-129/I-127 ratio was found in two investigated loess-paleosol sections from Xifeng and Luochuan, China. This ratio is one order of magnitude higher than the initial value reported for the marine environment. Alteration of the natural initial I-129 In the investigated samples due to the downward migration of anthropogenic I-129 and by excess fissiogenic I-129 from uranium was not supported. Consequently, the I-129/I-127 ratio measured is considered to be a pristine value, and the difference from that In the marine systems is attributed to an Isotopic dilution effect. (C) 2018 Elsevier Ltd. All rights reserved. |
| 关键词 | I-129 Dating Initial I-129/i-127 Ratio Loess Ams |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1016/j.gca.2018.04.014 |
| 关键词[WOS] | ACCELERATOR MASS-SPECTROMETRY ; PORE WATERS ; MARINE-SEDIMENTS ; IODINE ; ORIGIN ; I-129/I-127 ; DEPOSITS ; PLATEAU ; SAMPLES ; TRACER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:000432750300005 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/5129 |
| 专题 | 加速器质谱中心 |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 2.Xian AMS Ctr, Shaanxi Key Lab AMS Technol & Applicat, Xian, Shaanxi, Peoples R China 3.Beijing Normal Univ, Joint Ctr Global Change Studies, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, Yukun,Zhou, Weijian,Hou, Xiaolin. Pre-nuclear level of I-129 in Chinese loess-paleosol sections: A search for the natural I-129 level for dating in terrestrial environments[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2018,231(4):64-72. |
| APA | Fan, Yukun,Zhou, Weijian,&Hou, Xiaolin.(2018).Pre-nuclear level of I-129 in Chinese loess-paleosol sections: A search for the natural I-129 level for dating in terrestrial environments.GEOCHIMICA ET COSMOCHIMICA ACTA,231(4),64-72. |
| MLA | Fan, Yukun,et al."Pre-nuclear level of I-129 in Chinese loess-paleosol sections: A search for the natural I-129 level for dating in terrestrial environments".GEOCHIMICA ET COSMOCHIMICA ACTA 231.4(2018):64-72. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Pre-nuclear level of（985KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论