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学科主题: 地理学::自然地理学
题名: Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau
作者: Wu, GJ (Wu, Guangjian)1, 2, 6; Zhang, XL (Zhang, Xuelei)3; Zhang, CL (Zhang, Chenglong)4; Xu, TL (Xu, Tianli)1, 5
通讯作者: Wu, GJ
刊名: JOURNAL OF GLACIOLOGY
发表日期: 2016
DOI: 10.1017/jog.2016.8
卷: 62, 期:231, 页:46-53
收录类别: SCI
合作性质: 国内
文章类型: Article
英文摘要: Using a field emission scanning electron microscope and energy-dispersive X-ray spectrometer (FESEM-EDS), individual insoluble dust particles in ice cores recovered from the northern (Dunde), western (Murtagata) and south-eastern (Palong-Zangbo) Tibetan Plateau were analysed in order to reveal the mineralogical and morphological characteristics of the analogue of long-range transported Asian dust. The results reveal that the dust particles are mainly composed of quartz (17-36%, number abundance), clay (37-48%) and feldspar (12-18%). Illite and chlorite are the dominant clay species, while kaolinite is rarely observed. For the three sites, regional differences in the mineral assemblages are significant, in particular the abundance of quartz, chlorite and muscovite species, reflecting the regional provenance of these dust particles and the climatic regime in their source areas. Oxide ratios in clays indicate different weathering strengths of the particles in their source regions, with a higher K2O/(SiO2 + Al2O3) in the western and northern Tibetan Plateau. The individual particles have modes of 1.48 and 1.53 in the aspect ratio and circularity distribution respectively. No significant relationship between aspect ratio and circularity was found. Quartz and feldspar particles have a narrow aspect ratio distribution. Muscovite particles have the coarsest grain size, while chlorite particles have the finest.
语种: 英语
WOS记录号: WOS:000376838400005
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7867
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130102, Peoples R China
4.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Tibetan Plateau Res, 16 Courtyard,Lincui Rd, Beijing 100101, Peoples R China

Recommended Citation:
Wu, GJ ,Zhang, XL ,Zhang, CL ,et al. Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau[J]. JOURNAL OF GLACIOLOGY,2016,62(231):46-53.
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文件名: V.62(231) 46-53 2016.pdf
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