Contribution of Asian dust to soils in Southeast China estimated with Nd and Pb isotopic compositions
Contribution of Asian dust to soils in Southeast China estimated with Nd and Pb isotopic compositions作者机构:Key Laboratory of Soil Contamination Bioremediation of Zhejiang ProvinceZhejiang A&F UniversityHangzhou 311300China National Center for Tea Plant ImprovementTea Research InstituteChinese Academy of Agricultural SciencesHangzhou 310008.China New South Wales Department of Primary Industries1243 Bruxner HighwayWollongbarNSW 2477Australia Institute of the Surface-Earth System Science ResearchTianjin UniversityTianjin 300072China College of EnvironmentZhejiang University of TechnologyHangzhou 310014China
出 版 物:《Acta Geochimica》 (地球化学学报(英文))
年 卷 期:2020年第39卷第6期
页 面:911-919页
核心收录:
学科分类:0709[理学-地质学] 0819[工学-矿业工程] 0708[理学-地球物理学] 09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金:the China Natural Science Foundation(Nos.41877006 and 41930862) we also express great thanks to Hailong Wang for his assistance in language polishing
主 题:Aeolian dust Soil genesis Rural soils Basalt
摘 要:Asian dust has been identified in subtropical soils of ***(Nd)and lead(Pb)elemental and isotopic geochemistry of soils in Southeast China were used to assess the significance of local versus extraneous *** εNd(0)values were close to the parent rocks(+2.9)in the young soils(NSJ);while their values were always negative(〜—3.7)in the old soils(OMJ),implying dust *** young soils contained less Asian dust contribution(8%)while the old soils contained more than 50%Asian dust *** implied that dust contributions were gradually increasing with the soil development stage and Asian dust input had become the principal Nd source for the old soils in this *** the other hand,Pb excesses and low 207Pb/206Pb values(〜0.8503)in near-surface soils indicated a significant anthropogenic Pb addition onto surface *** close relationship between the Pb content and isotopic ratios in the soil profile indicated that the excessive lead in the surface soil was *** results suggested that Asian dust made up a significant fraction in the old soils,but that local sources(i.e.,basalt and anthropogenic)were not trivial in Southeast China.