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Boron isotopes geochemistry of the Changjiang basin rivers
Chetelat, B.1; Liu, C. -Q.1; Gaillardet, J.2; Wang, Q. L.1; Zhao, Z. Q.1; Liang, C. S.1; Xiao, Y. K.3
2009-10-15
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
Volume73Issue:20Pages:6084-6097
SubtypeArticle
AbstractWe report analyses of B isotopic compositions in water and suspended particulate matter collected in the Changjiang and its main tributaries. We showed that four sources control the dissolved boron budget; namely atmospheric deposition, evaporite dissolution, anthropogenic inputs and silicate weathering. The contribution of silicate weathering to the dissolved B load ranges from 40% to 50% for the Changjiang main channel and from 45% to 88% for the main tributaries. The isotopic composition of dissolved boron derived from silicate weathering range from -3 parts per thousand up to +9 parts per thousand suggesting that isotopic fractionation occurs during silicate weathering. The boron isotopic composition of suspended particulate matter range from -11.4 parts per thousand to -6 parts per thousand. Boron derived from silicate weathering is preferentially carried out by the dissolved load which accounts for 30-96% of the total boron. We show that the isotopic compositions of both the dissolved load and suspended particulate matter are controlled by the competition between boron leaching and boron uptake into secondary phases. The first process is characterized by a loss of boron relative to the bedrock without apparent isotopic fractionation whereas the last one is associated to a large isotopic fractionation which enriches the dissolved boron in heavy isotope. (C) 2009 Elsevier Ltd. All rights reserved.
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordYANGTZE-RIVER ; SURFACE COMPLEXES ; HIMALAYAN RIVERS ; SEINE RIVER ; FRACTIONATION ; CHINA ; CARBONATE ; EROSION ; SAMPLES ; FRANCE
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000273416500009
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Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/5918
Collection青海盐湖研究所知识仓储
Affiliation1.CAS, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China
2.Univ Paris 07, Inst Phys Globe, Equipe Geochim & Cosmochim, UMR 7579, F-75252 Paris 05, France
3.Chinese Acad Sci, Qinghai Inst Salk Lakes, Xining 810008, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Chetelat, B.,Liu, C. -Q.,Gaillardet, J.,et al. Boron isotopes geochemistry of the Changjiang basin rivers[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2009,73(20):6084-6097.
APA Chetelat, B..,Liu, C. -Q..,Gaillardet, J..,Wang, Q. L..,Zhao, Z. Q..,...&Xiao, Y. K..(2009).Boron isotopes geochemistry of the Changjiang basin rivers.GEOCHIMICA ET COSMOCHIMICA ACTA,73(20),6084-6097.
MLA Chetelat, B.,et al."Boron isotopes geochemistry of the Changjiang basin rivers".GEOCHIMICA ET COSMOCHIMICA ACTA 73.20(2009):6084-6097.
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