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DOI	10.1017/jog.2016.8
	Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau
	Wu, Guangjian; Zhang, Xuelei; Zhang, Chenglong; Xu, Tianli
通讯作者	Wu, GJ (通讯作者)
发表日期	2016
ISSN	0022-1430
EISSN	1727-5652
起始页码	46
结束页码	53
卷号	62 期号:231
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.
关键词	ACE-ASIA ELECTRON-MICROSCOPY GREENLAND ICE SOIL DUST CHINA AEROSOL CHEMISTRY REGIONS SHAPE SNOW
英文关键词	Asian dust; ice core; mineralogy and morphology; SEM-EDS
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000376838400005
来源期刊	JOURNAL OF GLACIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258750
推荐引用方式 GB/T 7714	Wu, Guangjian,Zhang, Xuelei,Zhang, Chenglong,et al. Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,62(231).
APA	Wu, Guangjian,Zhang, Xuelei,Zhang, Chenglong,&Xu, Tianli.(2016).Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau.JOURNAL OF GLACIOLOGY,62(231).
MLA	Wu, Guangjian,et al."Mineralogical and morphological properties of individual dust particles in ice cores from the Tibetan Plateau".JOURNAL OF GLACIOLOGY 62.231(2016).