| Application of transition metal isotope tracers in global change research |
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| 作者姓名： | 宋金明 ThomasF.Pedersen |
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| 作者单位： | [1]MarineEcologyandEnvironmentalScienceLab,InstituteofOceanology,ChineseAcademyofSciences.Qingdao266071,China [2]DepartmentofEarthandOceanSciences,UniversityofBritishColumbia.Vancouver,V6T1Z4,Canada |
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| 基金项目： | Project supported by Qingdao special project for outstanding young scientists (04-3-JJ-03), “100 Talents Project ” and the Science Innovation Key Projects of the Chinese Academy of Sciences (No. KZCX1-SW- 01-08) and the National Science Foundation for Young Scientists of China (No.49925614). |
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| 摘 要： | High-precision isotope composition determinations using multicollector, magnetic-sector inductively coupled plasma mass spectrometry (MC-ICPMS) have recently revealed that some transition metal isotopes such as those of Mo, Fe, Cu, Zn etc. can be used as biogeochemical tracers in global change research.The Mo isotope system may be useful in paleoredox investigations indicating that δ^97 ^95Mo in seawater may co-vary with changes in the relative proportions of anoxic and oxic sedimentation in the ocean, and that this variation may be recorded in δ^97 ^95Mo of anoxic sediments. The Mo continental flux into the oceans and the global Mo isotope budget can be estimated from δ^97 ^95M0 values. The Fe isotope composition in seawater is an important issue because Fe plays a controlling role in biological productivity in the oceans and its abundance in seawater may have substantial effect on climate changes. Iron isotope fractionations could result from bio- and abio-processes and have about 0.1% variation ( δ^56 ^54Fe), so Fe isotopes considered alone cannot be used to distinguish the products of abiotic and biotic Fe processing in geological records. Cu and Zn isotopes are also used as biogeochemical tracers, but the researches are relatively less. This review mainly focuses on the methods for preparation, purification and determination of new isotope tracer samples, and on isotope applications in marine environmental changes.
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| 关 键 词： | 金属同位素变换 生物地球化学追踪 全球研究 耦合等离子体质谱仪 |
| 收稿时间： | 24 July 2003 |
| 修稿时间： | 16 March 2004 |
Application of transition metal isotope tracers in global change research |
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| Song Jinming,Thomas F. Pedersen.Application of transition metal isotope tracers in global change research[J].Chinese Journal of Oceanology and Limnology,2005,23(2):218-225. |
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| Authors: | Song Jinming Thomas F Pedersen |
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| Institution: | (1) Marine Ecology and Environmental Science Lab, Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China;(2) Department of Earth and Ocean Sciences, University of British Columbia, V6T 1Z4 Vancouver, Canada |
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| Abstract: | High-precision isotope composition determinations using multicollector, magnetic-sector inductively coupled plasma mass spectrometry
(MC-ICPMS) have recently revealed that some transition metal isotopes such as those of Mo, Fe, Cu, Zn etc. can be used as
biogeochemical tracers in global change research. The Mo isotope system may be useful in paleoredox investigations indicating
that δ97/95Mo in seawater may co-vary with changes in the relative proportions of anoxic and oxic sedimentation in the ocean, and that
this variation may be recorded in δ97/95Mo of anoxic sediments. The Mo continental flux into the oceans and the global Mo isotope budget can be estimated from δ97/95Mo values. The Fe isotope composition in seawater is an important issue because Fe plays a controlling role in biological
productivity in the oceans and its abundance in seawater may have substantial effect on climate changes. Iron isotope fractionations
could result from bio- and abio-processes and have about 0.1% variation (δ56/54Fe), so Fe isotopes considered alone cannot be used to distinguish the products of abiotic and biotic Fe processing in geological
records. Cu and Zn isotopes are also used as biogeochemical tracers, but the researches are relatively less. This review mainly
focuses on the methods for preparation, purification and determination, of new isotope tracer samples, and on isotope applications
in marine environmental changes.
Project supported by Qingdao special project for outstanding young scientists (04-3-JJ-03). “100 Talents Project” and the
Science Innovation Key Projects of the Chinese Academy of Sciences (No. KZCX1-SW-01-08) and the National Science Foundation
for Young Scientists of China (No. 49925614). |
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| Keywords: | transition metal isotope biogeochemical tracers global change research |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
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