中国西北主要粉尘源区地表物质的常量元素分析

 粉尘是大气气溶胶的主要种类之一,对区域甚至全球的环境和气候具有重大影响。对中国西北地区主要粉尘源区的元素特征深入研究,关系到西北、华北、远东和太平洋地区粉尘堆积、来源以及环境效应的认识。分析塔克拉玛干沙漠、古尔班通古特沙漠、巴丹吉林沙漠、柴达木盆地、河西走廊和黄土高原等西北主要粉尘源区地表样品的常量元素含量,表明:①Mg、Si和Na的含量各源区之间差异较大,反映了利用Mg、Na和Si识别不同源区的可能性; ②兰州、洛川黄土的各元素除Na外,其余分布特征基本一致,可能揭示了兰州与洛川马兰黄土的物源基本相同; ③气候和母质共同决定了元素分布的区域差异。

Major Elemental Characteristics of the Major Dust Source Regions in Northwest China

Dust is a major kind of aerosol, it may play important role on regional even global climate. The in-depth study on elemental characteristics of the major dust source regions in northwest China relates to cognition of dust accumulation, source and environmental effects in northwest China, North China, Far East and the Pacific regions. Surface soil samples in the Taklimakan Desert, the Gurbantunggut Desert, the Badain Jaran Desert, the Qaidam Basin, the Hexi Corridor and the Loess Plateau were analyzed. The results shows: ①the contents of Mg, Na and Si are apparent different in various regions; ②the elemental characteristics of Lanzhou loess is nearly the same as that of Luochuan loess, except Na; ③The contents of elements are identified by both climate and parent materials.