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DOI	10.1016/j.epsl.2019.115990
	Seasonal riverine barium isotopic variation in the middle Yellow River: Sources and fractionation
	Gou L.-F.; Jin Z.; Galy A.; Gong Y.-Z.; Nan X.-Y.; Jin C.; Wang X.-D.; Bouchez J.; Cai H.-M.; Chen J.-B.; Yu H.-M.; Huang F.
发表日期	2020
ISSN	0012821X
卷号	531
英文摘要	Barium (Ba) isotopes have been used to trace water mass mixing and export productivity in the oceans. However, the sources, isotopic signature and seasonal variation of dissolved Ba in large rivers remain poorly constrained. In order to improve our understanding of sources and fractionation of riverine Ba isotopes at the continental scale, weekly sampling of river water was carried out in the middle Yellow River over the full hydrological year of 2013. Dissolved Ba was mainly sourced from silicate dissolution, whose flux was correlated with physical erosion rate in this arid to semi-arid basin, largely covered by loess. More than half of the annual dissolved Ba flux was transported during the monsoon season (June to mid-September), in particular during a storm event period (accounting for 4% of the annual dissolved Ba flux in 4 days). The dissolved Ba isotopic composition (δ138Barw) ranged from +0.17‰ to +0.46‰, all higher than δ138Ba of loess (0.00 ± 0.04‰). The seasonal variation in δ138Barw is best explained via an adsorption model of light Ba isotopes onto solids in the river, which is sensitive to erosion of loess, in particular during the storm event and the spring-time ice melting intervals, with a potential role of barite precipitation in groundwater during the dry seasons. With one to three orders of magnitude higher particulate matter fluxes during the monsoon seasons in rivers such as the Yellow River, desorption of Ba could result an unaccounted strong variation of Ba concentration and isotopic composition in coastal environments, which further study requires. © 2019 Elsevier B.V.
关键词	adsorption barium isotopes seasonal variation silicate weathering the Chinese Loess Plateau the Yellow River
英文关键词	Adsorption; Atmospheric thermodynamics; Dissolution; Erosion; Groundwater; Rivers; Sediments; Silicates; Storms; Weathering; Chinese Loess Plateau; Coastal environments; Isotopic composition; Seasonal variation; Silicate dissolution; Silicate weathering; Three orders of magnitude; Yellow river; Isotopes
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202613
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CAS Center for Excellence in Quaternary Science and Global Change, Xian, 710061, China; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China; Centre de Recherches Pétrographiques et Géochimiques, UMR7358, CNRS, Université de Lorraine, Vandoeuvre les Nancy, 54500, France; Key Laboratory of Crust-Mantle Materials and Environments of Chinese Academy of Sciences, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China; Department of Marine Geology, Tongji University, Shanghai, 200092, China; Institut de Physique du Globe de Paris, Université Paris Diderot, Sorbonne Paris Cité, CNRS, UMR 7154, 1 rue Jussieu, Paris, 75238, France; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China
推荐引用方式 GB/T 7714	Gou L.-F.,Jin Z.,Galy A.,et al. Seasonal riverine barium isotopic variation in the middle Yellow River: Sources and fractionation[J],2020,531.
APA	Gou L.-F..,Jin Z..,Galy A..,Gong Y.-Z..,Nan X.-Y..,...&Huang F..(2020).Seasonal riverine barium isotopic variation in the middle Yellow River: Sources and fractionation.Earth and Planetary Science Letters,531.
MLA	Gou L.-F.,et al."Seasonal riverine barium isotopic variation in the middle Yellow River: Sources and fractionation".Earth and Planetary Science Letters 531(2020).