气候变化领域集成服务门户(CCPortal): 扎当冰川雪坑中不同粒径微粒元素和矿物组成特征

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	扎当冰川雪坑中不同粒径微粒元素和矿物组成特征
其他题名	Mineral and Elemental Characteristics of Microparticles with Different Size Fraction in Snowpits from Zadang Glacier
	余光明; 徐建中; 康世昌; 黄杰; 任贾文
发表日期	2011
ISSN	0250-3301
卷号	32 期号:11 页码:3264-3270
中文摘要	为了研究雪冰中不溶性微粒的矿物和元素组成及其来源，2009年5月和7月在念青唐古拉山扎当冰川垭口采集了2个雪坑样品，采用质子激发X荧光分析(PIXE)和X射线衍射定量分析方法(XRD)测定了不同季节粗细微粒(d>10mum和0.22mum
英文摘要	In order to study the mineral and elemental composition of insoluble microparticles (IP) in snow/ice, two snowpits were collected from the Zadang Glacier in Mt. Nyainqentanglha (30.47°N, 90.65°E, 5800 m a.s.l) in May and July, 2009, and IP samples were investigated. The measurements of mineral composition with different size fractions (d >10 mum and 0.22 mum< d <10 mum) were carried out using Particle-induced X-ray emission (PIXE) and X-ray diffraction analysis (XRD). The main mineral components of both coarse and fine IP are quartz, mica and calcite, accounting for 71.5% and 76.5%, respectively. The crustal elements concentrations (e.g. Si, Al, Fe, K, Mg and Ca) are 97% and 85.1% of total coarse/fine IP, while S, Cl and P take fairly proportion in fine microparticles (d <10 mum). Seasonal variability of mineral composition in coarse microparticles (d >10 mum) is not obviously; However it's significantly in fine IP. Enrichment factors (EF) analysis reveals that several elements (e.g. Sc, P, Cr, S and Cl) in fine IP during monsoon season have high values which indicate these elements may be influenced by anthropogenic activities. Backward air mass trajectory analysis suggests that air masses in this region mainly originate from the South Asia areas during monsoon season, and air masses mainly come from arid/semi-arid region in the South and West Asia during non-monsoon season. Therefore, anthropogenic pollutants from the South Asia may be transported by the summer Indian monsoon to the Zadang glacier area. The coarse IP may derive from the local or remote mineral dust, and chemical compositions of fine IP interfere with anthropogenic pollutants.
关键词	扎当冰川不溶性微粒质子激发X荧光(PIXE)X射线衍射(XRD)富集因子后向轨迹
英文关键词	Zadang Glacier;insoluble microparticle;particle-induced X-ray emission (PIXE);X-ray diffraction (XRD);enrichment factor;backward trajectory
语种	中文
来源期刊	环境科学
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89670
推荐引用方式 GB/T 7714	余光明,徐建中,康世昌,等. 扎当冰川雪坑中不同粒径微粒元素和矿物组成特征[J]. 中国科学院西北资源环境生态研究院,2011,32(11):3264-3270.
APA	余光明,徐建中,康世昌,黄杰,&任贾文.(2011).扎当冰川雪坑中不同粒径微粒元素和矿物组成特征.环境科学,32(11),3264-3270.
MLA	余光明,et al."扎当冰川雪坑中不同粒径微粒元素和矿物组成特征".环境科学 32.11(2011):3264-3270.