摘要
采用稳定同位素方法,对中国沙尘暴主要源区塔克拉玛干沙漠、柴达木盆地沙漠、库姆塔格沙漠、腾格里沙漠、乌兰布和沙漠、毛乌素沙地进行了采样分析。结果表明:22个样品^(18)O和^(30)Si的δ值变化范围分别为9.6~14.8和-1.7~0.3,其中^(18)O的δ值库姆塔格沙漠最大,柴达木盆地沙漠最小,^(30)Si的δ值毛乌素沙地最大,柴达木盆地沙漠最小。总体而言,样品中30Si的δ值的变异系数要比^(18)O的δ的变异系数大,因此^(30)Si更适合用于沙尘溯源。相邻的沙漠(沙地)呈现出^(30)Si的δ值相近的趋势,因此推断相邻的沙漠(沙地)沉积物可能来自同一地区。
By using stable isopote analysis method,we research the stable isotope background values of samples of Taklimakan Desert,Qaidam Basin Desert,Kumtagh Desert,Tengger Desert,Ulan Buh Desert,Mu Us Sandy Land which are the major dust storm source regions in China.The results show that theδvalues of ^（18）O and ^（30）Si of 22 samples range at 9.6-14.8 and-1.7-0.3,respectively.Theδvalue of ^（18）O from is the maximum in the Kumtagh Desert,and it is the minimum in the Qaidam Basin Desert.Theδvalue of ^（30）Si value is maximum in the Mu Us Sandy Land,and is minimum in the Qaidam Basin Desert.Overall,the variation coefficients ofδvalue of ^（30）Si are greater than the variation coefficient ofδvalues of ^（18）O.So,^（30）Si is more suitable for dust storm source research.Furthermore,the adjacent deserts showed a similar trend of ^（30）Si.Therefore,it is inferred that the sediments of adjacent deserts may come from the same area.
出处
《中国沙漠》
CSCD
北大核心
2016年第3期604-609,共6页
Journal of Desert Research
基金
国家自然科学基金项目(41371500)
引进国际先进林业科学技术项目(2012-4-77)
关键词
沙尘暴
稳定同位素
溯源
背景值
dust storm
stable isotope
trace ability
background value
