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Hf-Nd isotopic variability in mineral dustfrom Chinese and Mongolian deserts:implications for sources and dispersal
Zhao,WC(Zhao,Wancang)[1,2]; Sun,YB(Sun,Youbin)[3]; Balsam,W(Balsam,William)[4]; Lu,HY(Lu,Huayu)[5]; Liu,LW(Liu,Lianwen)[1]; Chen,J(Chen,Jun)[1]; Ji,JF(Ji,Junfeng)[1]
2014-07-25
Source PublicationSCIENTIFIC REPORTS
Volume4Pages:5837
Subtype期刊论文
Abstract

Mineral dust provenances are closely related to the orogenic processes which may have distinct Hf-Nd isotopic signatures. Here we report the clay-sized (,2 mm) Hf-Nd isotope data from Asian dust sources to better constrain the source and transport dynamics of dust deposition in the North Pacific. Our results show that there is a more positive radiogenic Hf isotopic composition with clay-sized fractions than the corresponding bulk sample and a decoupling of the Hf-Nd couplets in the clay formation during the weathering process. The clay-sized Hf-Nd isotopic compositions of the desert samples from the Sino-Korean-Tarim Craton (SKTC) are different from those of the Gobi and deserts from the Central Asian Orogeny Belt (CAOB) due to varying tectonic and weathering controls. The Hf-Nd isotopic compositions of dust in the North Pacific central province (NPC) match closely with those from the Taklimakan, Badain Jaran and adjacent Tengger deserts, implying that the NPC dust was mainly transported from these potential sources by the westerly jet. Our study indicates that dusts from the CAOB Gobi deserts either didn’t arrive in NPC or were quantitatively insignificant, but they were likely transported to the North Pacific margin province (NPM) by East Asian winter monsoon.

DOI10.1038/srep05837
Indexed BySCI
Language英语
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9865
Collection古环境研究室
Corresponding AuthorJi,JF(Ji,Junfeng)[1]
Affiliation1.Key Laboratory of Surficial Geochemistry, Ministry of Education; School of Earth Sciences and Engineering, Nanjing University,Nanjing 210023, China;
2.Ningxia Geophysical and Geochemical Exploration Institute, Yinchuan 710001, China;
3.SKLLQG,Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
4.Department of Earth Sciences, DartmouthCollege, Hanover, New Hampshire, USA;
5.School of Geographic and Oceanographic Sciences, Institute for Climate and GlobalChange Research, Nanjing University, Nanjing 210023, China
Recommended Citation
GB/T 7714
Zhao,WC,Sun,YB,Balsam,W,et al. Hf-Nd isotopic variability in mineral dustfrom Chinese and Mongolian deserts:implications for sources and dispersal[J]. SCIENTIFIC REPORTS,2014,4:5837.
APA Zhao,WC.,Sun,YB.,Balsam,W.,Lu,HY.,Liu,LW.,...&Ji,JF.(2014).Hf-Nd isotopic variability in mineral dustfrom Chinese and Mongolian deserts:implications for sources and dispersal.SCIENTIFIC REPORTS,4,5837.
MLA Zhao,WC,et al."Hf-Nd isotopic variability in mineral dustfrom Chinese and Mongolian deserts:implications for sources and dispersal".SCIENTIFIC REPORTS 4(2014):5837.
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