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Chemical weathering processes in the Yalong River draining the eastern Tibetan Plateau, China
Si-Liang Li; Benjamin Chetelat; Fujun Yue; Zhiqi Zhao; Cong-Qiang Liu
2014
Source PublicationJournal of Asian Earth Sciences
Volume88Issue:1Pages:74-84
AbstractTo better understand chemical weathering and controlling processes in the Yalong River of the eastern Tibetan Plateau, this study presents major ion concentrations and stable isotopes of the dissolved loads. The isotopic compositions (delta C-13-DIC, delta S-34 and delta O-18-SO4) of the dissolved loads are very useful to quantify solute sources and define the carbon budget related with chemical weathering in riverine systems. The isotopic composition of sulphate demonstrates that most of the sulphate is derived from sulphide oxidation, particularly in the upper reach of the Yalong River. The correlations between delta C-13-DIC, water chemistry and isotopes of sulphate, suggest that the carbon dynamics are mainly affected by carbonate weathering by sulphuric acid and equilibration processes. Approximately 13% of the dissolved inorganic carbon in the Yalong River originates from carbonate weathering by strong acid. The CO2 consumption rates are estimated to be 2.8 x 10(5) mol/km(2)/yr and 0.9 x 10(5) mol/km2/yr via carbonate and silicate weathering in the Yalong River, respectively. In this study, the influence of sulphide oxidation and metamorphic CO2 on the carbon budget is estimated for the Yalong River draining the eastern Tibetan Plateau.
KeywordDual Isotopes Of Sulphate Δ13c-dic Hot Spring Weathering Processes Eastern Himalaya
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/5224
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
Si-Liang Li,Benjamin Chetelat,Fujun Yue,et al. Chemical weathering processes in the Yalong River draining the eastern Tibetan Plateau, China[J]. Journal of Asian Earth Sciences,2014,88(1):74-84.
APA Si-Liang Li,Benjamin Chetelat,Fujun Yue,Zhiqi Zhao,&Cong-Qiang Liu.(2014).Chemical weathering processes in the Yalong River draining the eastern Tibetan Plateau, China.Journal of Asian Earth Sciences,88(1),74-84.
MLA Si-Liang Li,et al."Chemical weathering processes in the Yalong River draining the eastern Tibetan Plateau, China".Journal of Asian Earth Sciences 88.1(2014):74-84.
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