| JI Lihong,LIU Guangshan,CHEN Zhigang,HUANG Yipu,XING Na,JIANG Shan,HE Ming.Measurement of 129I in ferromanganese crust with AMS[J].Acta Oceanologica Sinica,2015,34(10):31-35 |
| Measurement of 129I in ferromanganese crust with AMS |
| Measurement of 129I in ferromanganese crust with AMS |
| 投稿时间：2014-07-03 修订日期：2014-08-07 |
| DOI：10.1007/s13131-015-0718-4 |
| 中文关键词: ferromanganese crust AgI 129I/127I ratio accelerator mass spectrometry 129I-dating |
| 英文关键词:ferromanganese crust AgI 129I/127I ratio accelerator mass spectrometry 129I-dating |
| 基金项目:The National Natural Science Foundation of China under contract No. 41073044. |
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| 摘要点击次数: 2013 |
| 全文下载次数: 2235 |
| 中文摘要: |
| In the present study, the analytical method for 129iodine (129I) in ferromanganese crusts is developed and 129iodine/127iodine (129I/127I) ratio in ferromanganese crusts is measured by the accelerator mass spectrometry (AMS). The developed method is applied to analyze 129I/127I ratio in two ferromanganese crusts MP5D44 and CXD08-1 collected from the Mid-Pacific Ocean. The results show that 129I/127I ratio in MP5D44 and CXD08-1 crusts varies from 7×10-14 to 1.27×10-12, with the lowest value falling on the detection limit level of AMS reported by previous literatures. For the depth distribution of 129I/127I, it is found that both MP5D44 and CXD08-1 crusts have two growth generations, and the 129I/127I profiles in two generations all displayed an approximate exponential decay. According to the 129I/127I ratio, the generate age of bottom layer of MP5D44 and CXD08-1 was estimated to be 54.77 and 69.69 Ma, respectively. |
| 英文摘要: |
| In the present study, the analytical method for 129iodine (129I) in ferromanganese crusts is developed and 129iodine/127iodine (129I/127I) ratio in ferromanganese crusts is measured by the accelerator mass spectrometry (AMS). The developed method is applied to analyze 129I/127I ratio in two ferromanganese crusts MP5D44 and CXD08-1 collected from the Mid-Pacific Ocean. The results show that 129I/127I ratio in MP5D44 and CXD08-1 crusts varies from 7×10-14 to 1.27×10-12, with the lowest value falling on the detection limit level of AMS reported by previous literatures. For the depth distribution of 129I/127I, it is found that both MP5D44 and CXD08-1 crusts have two growth generations, and the 129I/127I profiles in two generations all displayed an approximate exponential decay. According to the 129I/127I ratio, the generate age of bottom layer of MP5D44 and CXD08-1 was estimated to be 54.77 and 69.69 Ma, respectively. |
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