Please wait a minute...
img img
Adv. Search
Advances in Earth Science  2008, Vol. 23 Issue (9): 952-958    DOI: 10.11867/j.issn.1001-8166.2008.09.0952
Articles     
Lithium Isotopic Composition of the Dissolved and Suspended Loads of the Yangtze River,China
Wang Qilian1,2,Liu Congqiang1,Zhao Zhiqi1,Chetelat Benjami1,Ding Hu1,2
1.State Key Laboratory of Environment Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China
Download:  PDF (1640KB) 
Export:  BibTeX | EndNote (RIS)      
Abstract  

A comprehensive understanding of lithium-isotope fractionation during terrestrial weathering is necessary in order to use lithium isotopes to trace chemical cycle and climatic changes. This study investigates lithium and lithium isotopic composition in the main tributaries and the main Yangtze river channel. The concentrations and isotopic compositions (δ7Li) of dissolved Li in the Yangtze river are in the range of 150n mol/L~4570n mol/L and in the range of +7.6‰~+28.1‰ respectively. Lithium isotopic compositions (δ7Li) of the suspended matter are relatively stable (-4.7‰~+0.7‰), and lighter than those of dissolved Li in the Yangtze river. Isotopic fractionation factors of between dissolved and suspended loads range from 0.977 to 0.992, and are corrected with the concentration and chemical composition of suspended matter in the Yangtze river main channel. This should reflect the adsorption of clay mineral and the degree of chemical weathering. The positive relationship between δ7Li and 1/Li for the dissolved load shows that the dissolved lithium probably has two main sources. One may be evaporites with some thermal spring, and another one may be silicates.

Key words:  Lithium isotopes      Isotopic fractionation      Clay mineral      Chemical weathering      Origin.     
Received:  21 April 2008      Published:  10 September 2008
P618.71  
  P512.1+2  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
LIU Congqiang
DING Hu1,
Chetelat Benjami
ZHAO Zhiqi
WANG Qilian

Cite this article: 

Wang Qilian,Liu Congqiang,Zhao Zhiqi,Chetelat Benjami,Ding Hu. Lithium Isotopic Composition of the Dissolved and Suspended Loads of the Yangtze River,China. Advances in Earth Science, 2008, 23(9): 952-958.

URL: 

http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2008.09.0952     OR     http://www.adearth.ac.cn/EN/Y2008/V23/I9/952

[1] Huh Y,Chan L H,Zhang L B,et al. Lithium and its isotopes in major world rivers: Implications for weathering and the oceanic budget[J]. Geochimica et Cosmochimica Acta,1998,6212:2 039-2 051.

[2] Huh Y,Chan L H,Edmond J M. Lithium isotopes as a probe of weathering processes: Orinoco river[J]. Earth and Planetary Science Letters,2001,1941/2:189-199.

[3] Pogge von Strandmann P A E,Burton K W,James R H,et al. Riverine behaviour of uranium and lithium isotopes in an actively glaciated basaltic terrain[J]. Earth and Planetary Science Letters,2006,2511/2:134-147.

[4] Kisakürek B,James R H,Harris N B W. Li and δ7Li in himalayan rivers: Proxies for silicate weathering[J]. Earth and Planetary Science Letters,2005,2373/4:387-401.

[5] Ding T,Wan D,Wang C,et al. Silicon isotope compositionsof dissolved silicon and suspended matter in the Yangtze river,China[J]. Geochimca et Cosmochimca Acta,2004,68:205-216.

[6] Wang Qilian,Zhao Zhiqi,Liu Congqiang,et al. Separation and isotopic determination of lithium in natural samples[J]. Chinese Journal of Analytical Chemistry,2006,346:764-768.[汪齐连,赵志琦,刘丛强,.天然样品中锂的分离及其同位素比值的测定[J].分析化学,2006,346:764-768.]

[7] Chetelat B,Liu C Q,Zhao Z Q,et al. Geochemistry of the dissolved load of the Changjiang basin rivers: Anthropogenic impacts and chemical weathering[J]. Geochimca et Cosmochimca Acta,2008in press.

[8] Pistiner J S,Henderson G M. Lihtium-isotope fraction during continental weathering processes[J]. Earth and Planetary Science Letters,2003,2141/2:327-339.

[9] Zhang L B,Chan L H,Gieskes J M. Lithium isotope geochemistry of pore waters from Ocean Drilling Program Sites 918 and 919, Irminger Basin[J]. Geochimica et Cosmochimica Acta,1998,6214:2 437-2 450.

[10] Tardy Y,Krempp G,Trauth N. Le lithium dans les minéraux argileux des sédiments et des sols[J]. Geochimica et Cosmochimica Acta,1972,364:397-412.

[11] StoffynEgli P,Mackenzie F T. Mass balance of dissolved lithium in the oceans[J]. Geochimca et Cosmochimca Acta,1984,484:859-872.

[12] Dong Jihe. Research and application of trace elements in halite[J]. Acta Mineralogical Sinica,1984,1:29-35.[董继和.石盐中微量元素的研究及其应用[J]. 矿物学报,1984,1:29-35.]

[13] Xiao Yingkai,Qi Haiping,Wang Yunhui,et al. Isotopic composition of lithium in the brine, sediments and source water from Da Qaidam lake of Qinhai province[J]. Geochemistry,1994,234:329-337.[肖应凯,祁海平,王蕴慧,.青海柴达木湖卤水、沉积物和水源水中的锂同位素组成[J].地球化学,1994,234:329-337.]

[14] Chan L H,Kastner M. Lithium isotopic compositions of pore fluids and sediments in the Costa Rica subduction zone:Implications for fluid processes and sediment contribution to the arc volcanoes[J]. Earth and Planetary Science Letters,2000,1831/2:275-290.

[15] You C F,Chan L H. Precise determination of lithium isotopic composition in low concentration natural samples[J]. Geochimca et Cosmochimca Acta,1996,605:909-915.

No Suggested Reading articles found!