DOI: 10.1002/grl.50217
论文题名: Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships
作者: Chen T.-Y. ; Li G. ; Frank M. ; Ling H.-F.
刊名: Geophysical Research Letters
ISSN: 0094-9252
EISSN: 1944-8983
出版年: 2013
卷: 40, 期: 5 起始页码: 916
结束页码: 920
语种: 英语
英文关键词: Hf isotopes
; seawater array
; weathering
Scopus关键词: Hafnium isotopes
; Hf isotope
; Isotope compositions
; Leachates
; Nd isotopes
; Northern China
; Upper continental crust
; Weathering regimes
; Hafnium
; Isotopes
; Seawater
; Silicates
; Weathering
; chemical composition
; continental crust
; data acquisition
; desert
; hafnium
; isotopic fractionation
; leaching
; loess
; provenance
; seawater
; silicate
; China
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 μm) and coarser fractions (<75 μm) 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. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876799020&doi=10.1002%2fgrl.50217&partnerID=40&md5=07d23cbb6e2b23f7c289f88aff6b08cd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6516
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1-3, 24148 Kiel, Germany
Recommended Citation:
Chen T.-Y.,Li G.,Frank M.,et al. Hafnium isotope fractionation during continental weathering: Implications for the generation of the seawater Nd-Hf isotope relationships[J]. Geophysical Research Letters,2013-01-01,40(5).