Arid
DOI10.1002/grl.50217
Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships
Chen, Tian-Yu1; Li, Gaojun2; Frank, Martin1; Ling, Hong-Fei3
通讯作者Chen, Tian-Yu
来源期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
出版年2013
卷号40期号:5页码:916-920
英文摘要

To investigate the mechanisms of the offset of seawater radiogenic Nd-Hf isotope compositions from those of the upper continental crust rocks, combined Nd-Hf isotope compositions of desert and loess samples from northern China (which integrate a wide range of lithologies and ages of continental rocks) are presented in this study. The results show significant and systematic fractionation of Hf isotopes between fine-grained detritals/leachates (<5 mu m) and coarser fractions (<75 mu m) of the same samples. A small but systematic difference of Nd isotope compositions between leachates and detrital silicates is also revealed. Overall, the leaching data either plot along or slightly above the Nd-Hf seawater array, providing strong direct support that the seawater Nd-Hf isotope relationship is predominantly generated by weathering of upper continental crust. Our study supports the application of dissolved Hf isotopes as a proxy for different modes of weathering regimes rather than for continental source provenances.


英文关键词Hf isotopes weathering seawater array
类型Article
语种英语
国家Germany ; Peoples R China
收录类别SCI-E
WOS记录号WOS:000318242900021
WOS关键词NEODYMIUM ISOTOPES ; MARINE-SEDIMENTS ; ASIAN DUST ; FERROMANGANESE NODULES ; PACIFIC-OCEAN ; CRUSTS ; CONSTRAINTS ; RATIOS ; SYSTEM ; MANTLE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构南京大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/177401
作者单位1.GEOMAR Helmholtz Ctr Ocean Res Kiel, D-24148 Kiel, Germany;
2.Nanjing Univ, Dept Earth Sci, MOE Key Lab Surficial Geochem, Nanjing 210008, Jiangsu, Peoples R China;
3.Nanjing Univ, Dept Earth Sci, State Key Lab Mineral Deposits Res, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714
Chen, Tian-Yu,Li, Gaojun,Frank, Martin,et al. Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships[J]. 南京大学,2013,40(5):916-920.
APA Chen, Tian-Yu,Li, Gaojun,Frank, Martin,&Ling, Hong-Fei.(2013).Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships.GEOPHYSICAL RESEARCH LETTERS,40(5),916-920.
MLA Chen, Tian-Yu,et al."Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships".GEOPHYSICAL RESEARCH LETTERS 40.5(2013):916-920.
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