| Influence of particle composition on thorium scavenging in the marginal China seas |
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| 作者姓名： | YANG Weifeng CHEN Min CAO Jianping QIU Yusheng ZHANG Run MA Qiang TONG Jinlu YANG Junhong YANG Zhi L&#; E |
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| 作者单位： | YANG Weifeng,CHEN Min(Department of Oceanography, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China);CAO Jianping,QIU Yusheng,ZHANG Run,MA Qiang,TONG Jinlu,YANG Junhong,YANG Zhi,L(U) E(Department of Oceanography, Xiamen University, Xiamen 361005, China)
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | Thorium-234 and particle composition (organic matter, biogenic silica, carbonate and lithogenic component) were examined in the East China Sea (ECS) and the northern South China Sea (NSCS) in order to constrain the particle types scavenging thorium isotopes. Good positive correlations between particulate organic matter (POM) or carbonate and thorium-234 in suspended particulate matter (SPM) indicates that POM and carbonate are efficient to scavenge thorium-234. No relationship between biogenic silica and thorium-234 suggests that geochemical behavior of thorium-234 may be not influenced by biogenic silica. A simple model was used to evaluate the affinity of thorium-234 to different particle components. The results show that POM is the most efficient scavenger for thorium-234 in the ECS and the NSCS, followed by carbonate. The authors'' results lend support to the utility of thorium-234 as a proxy of POC and carbonate in the upper layer. However, the strong dependence of thorium scavenging on particle composition challenges thorium-230 as a constant flux proxy.
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| 关 键 词： | 钍234 颗粒组成 中国海洋 清除 碳酸盐岩 神经干细胞 地球化学行为 悬浮颗粒物 |
| 收稿时间： | 2007/8/23 0:00:00 |
| 修稿时间： | 1/2/2008 12:00:00 AM |
Influence of particle composition on thorium scavenging in the marginal China seas |
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| YANG Weifeng,CHEN Min,CAO Jianping,QIU Yusheng,ZHANG Run,MA Qiang,TONG Jinlu,YANG Junhong,YANG Zhi,L&#; E.Influence of particle composition on thorium scavenging in the marginal China seas[J].Acta Oceanologica Sinica,2009,28(2):45-53. |
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| Authors: | YANG Weifeng CHEN Min CAO Jianping QIU Yusheng ZHANG Run MA Qiang TONG Jinlu YANG Junhong YANG Zhi and L&#; E |
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| Institution: | 1. Department of Oceanography, Xiamen University, Xiamen 361005, China;State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China
2. Department of Oceanography, Xiamen University, Xiamen 361005, China |
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| Abstract: | Thorium-234 and particle composition (organic matter, biogenic silica, carbonate and lithogenic component) were examined in the East China Sea (ECS) and the northern South China Sea (NSCS)in order to constrain the particle types scavenging thorium isotopes. Good positive correlations between particulate organic matter (POM) or carbonate and thorium-234 in suspended particulate matter (SPM) indicates that POM and carbonate are efficient to scavenge thorium-234. No relationship between biogenic silica and thorium-234 suggests that geochemical behavior of thorium-234 may be not influenced by biogenic silica. A simple model was used to evaluate the affinity of thorium-234 to different particle components. The results show that POM is the most efficient scavenger for thorium-234 in the ECS and the NSCS, followed by carbonate. The authors' results lend support to the utility of thorium-234 as a proxy of POC and carbonate in the upper layer. However, the strong dependence of thorium scavenging on particle composition challenges thorium-230 as a constant flux proxy. |
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| Keywords: | POC biogenic silica thorium carbonate particle composition |
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