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	Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance
	Feng J. L. ; Zhu L. P. ; Ju J. T. ; Zhou L. P. ; Zhen X. L. ; Zhang W. ; Gao S. P.
	2008
关键词	dust fall loess geochemical properties quartz oxygen isotope composition dust provenance grain-size distribution pacific pelagic sediments chinese loess plateau oxygen isotopes hawaiian-islands eolian origin aeolian dust quartz silt soils transport
英文摘要	A heavy dust fell in Beijing on April 16-17, 2006. The dust storm formed in middle and western Inner Mongolia, China, under a strong Mongolian Cyclone. During the dust fall, the near-surface wind speed was insignificant in Beijing. The minimal wind speed at ground level indicates that the dust must have been transported by upper northwestern winds, and the local dust of Beijing contributed little to dust fall. The lack of a contribution from local dust differed from previous dust fall events in Beijing. Therefore, this dust fall provides good information on the dust source. Dust samples colleted during this event and Pleistocene loess samples from the Beijing area were analyzed for magnetic susceptibility, bulk particle and quartz grain size distributions, bulk particle and quartz micro-textures, mineralogy, carbonate content, major element concentrations, trace element and rare earth element (REE) concentrations, and the oxygen isotope composition of quartz. The results indicate the following. (1) The dust of the April 2006 storm derives mainly from surface sediments in middle and western Inner Mongolia, with some minor contributions from anthropogenic emissions from coal combustion and mining. (2) The characteristics of the dust fall in China appear to vary with time and location, which has significance for palcoclimate reconstructions. (3) Many characteristics differ between the dust from 2006 event and Pleistocene loess in Beijing, and implying that the two have different sources. (4) The loess deposits found in Beijing and on the Loess Plateau also appear to differ in provenance.
出处	Geochemical Journal
卷	42
期	2
页	221-236
收录类别	SCI
语种	英语
ISSN号	0016-7002
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24042]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Feng J. L.,Zhu L. P.,Ju J. T.,et al. Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance. 2008.

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