干旱区生态环境知识资源中心(Arid): 新疆乌伦古湖表层沉积物元素地球化学行为研究

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	新疆乌伦古湖表层沉积物元素地球化学行为研究
其他题名	Geochemical behavior of elements in surface sediments from Ulungur Lake, Xinjiang
	王彩红 1; 李瑞博 1; 张成君 2
来源期刊	兰州大学学报. 自然科学版
ISSN	0455-2059
出版年	2015
卷号	51 期号:5 页码:600-607,612
中文摘要	利用X-荧光法对新疆乌伦古湖26个表层沉积物样品进行常量和微量元素分析，在样品采集时对采样点的水化学参数pH、电导率、盐度等进行测定.结果表明：乌伦古湖表层沉积物主要组成物质中w(CaO)、 w(Al_2O_3)、w(Fe_2O_3)、 w(MgO)均与w(SiO_2)之间有较好的相关性，w(K_2O)与omega(SiO_2)之间的相关性较差(R~2=0.198)，omega(Na_2O)与omega(SiO_2)之间几乎没有相关性(R~2=0.02).大多数微量元素与细粒沉积物有关，湖泊环境对金属元素的迁移和富集起到重要的控制作用.w(Si)/w(Al)可以用来指示封闭湖泊湖面升降变化，omega(Si)/w(Al)越低，代表水体越深、水动力越弱的环境；w(Si)/omega(Al)越高，代表水动力较强的环境.omega(Fe）/omega(Mn)对乌伦古湖泊水体深度指示不明显.
英文摘要	A total of 26 surface sediment samples from Ulungar Lake in Xinjiang were collected and analyzed for major elements and trace elements with the XRF method. The pH, conductivity and salinity were measured during the sampling process at each sampling site. The results showed that many of the main compositions of the Ulungur Lake surface sediments are significantly correlative with w(SiO_2), such as omega(CaO)， w(Al_2O_3）， w(Fe_2O_3)，omega(MgO)， the relationship between w(K_2O) and w(SiO_2) is weak (R~2=0.198)， and almost no relationship exists between w(Na_2O) and omega(SiO_2) (R~2=0.02). Most of the trace elements were relative to the fine-grained sediments， and the lacustrine environment was an important controlling factor to the transformation and concentration of the metal elements. In the closed lakes of arid areas, the proxy of omega(Si)/omega(Al) refers to the lake level fluctuations： the lower the omega(Si)/w(Al)，the deeper a lake with a weaker hydrodynamic force; the higher w(Si)/omega(Al), the stronger the hydrodynamic force. In conclusion, there is no close relationship between omega(Fe)/omega(Mn) and the depth of Ulungur Lake.
中文关键词	表层沉积物 ; 金属元素 ; 乌伦古湖 ; 新疆
英文关键词	surface sediment metal element Ulungur Lake Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5566831
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232970
作者单位	1.兰州大学资源环境学院, 兰州, 甘肃 730000, 中国; 2.兰州大学地球科学与矿产资源学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王彩红,李瑞博,张成君. 新疆乌伦古湖表层沉积物元素地球化学行为研究[J]. 兰州大学,2015,51(5):600-607,612.
APA	王彩红,李瑞博,&张成君.(2015).新疆乌伦古湖表层沉积物元素地球化学行为研究.兰州大学学报. 自然科学版,51(5),600-607,612.
MLA	王彩红,et al."新疆乌伦古湖表层沉积物元素地球化学行为研究".兰州大学学报. 自然科学版 51.5(2015):600-607,612.