Measurement of 129I in ferromanganese crust with AMS

被引：3
作者：
Ji Lihong [1 ]
Liu Guangshan [1 ]
Chen Zhigang [1 ]
Huang Yipu [1 ]
Xing Na [1 ]
Jiang Shan [2 ]
He Ming [2 ]
机构：
[1] Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China
[2] China Inst Atom Energy, Beijing 102413, Peoples R China
来源：
ACTA OCEANOLOGICA SINICA | 2015年 / 34卷 / 10期
基金：
中国国家自然科学基金;
关键词：
ferromanganese crust; AgI; I-129/I-127; ratio; accelerator mass spectrometry; I-129-dating; CARRIER-FREE IODINE; LOW-LEVEL I-129; PORE WATERS; SHIMOKITA PENINSULA; NATURAL I-129; SOURCE AGES; ACCELERATOR; BRINES; CL-36; I-129/I-127;
D O I：
10.1007/s13131-015-0718-4
中图分类号：
P7 [海洋学];
学科分类号：
0707 ;
摘要：
In the present study, the analytical method for (129)iodine (I-129) in ferromanganese crusts is developed and (129)iodine/(127)iodine (I-129/I-127) ratio in ferromanganese crusts is measured by the accelerator mass spectrometry (AMS). The developed method is applied to analyze I-129/I-127 ratio in two ferromanganese crusts MP5D44 and CXD08-1 collected from the Mid-Pacific Ocean. The results show that I-129/I-127 ratio in MP5D44 and CXD08-1 crusts varies from 7x10(-14) to 1.27x10(-12), with the lowest value falling on the detection limit level of AMS reported by previous literatures. For the depth distribution of I-129/I-127, it is found that both MP5D44 and CXD08-1 crusts have two growth generations, and the I-129/I-127 profiles in two generations all displayed an approximate exponential decay. According to the I-129/I-127 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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收藏
页码：31 / 35
页数：5
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