Pre-nuclear level of I-129 in Chinese loess-paleosol sections: A search for the natural I-129 level for dating in terrestrial environments
文献类型：期刊论文
| 作者 | Fan, Yukun1,2; Hou, Xiaolin1,2; Zhou, Weijian1,2,3 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2018-06-15 |
| 卷号 | 231期号:4页码:64-72 |
| 关键词 | I-129 Dating Initial I-129/i-127 Ratio Loess Ams |
| DOI | 10.1016/j.gca.2018.04.014 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| WOS关键词 | ACCELERATOR MASS-SPECTROMETRY ; PORE WATERS ; MARINE-SEDIMENTS ; IODINE ; ORIGIN ; I-129/I-127 ; DEPOSITS ; PLATEAU ; SAMPLES ; TRACER |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000432750300005 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5129]  |
| 专题 | 地球环境研究所_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,Hou, Xiaolin,Zhou, Weijian. 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,Hou, Xiaolin,&Zhou, Weijian.(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. |
入库方式： OAI收割
来源：地球环境研究所
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