【作者】 陈兵； 胡克； 介冬梅； 闫日清； 赵亮；

【Author】 CHEN Bing, HU Ke, JIE Dong-mei, YUAN Ri-qing, ZHAO Liang( College of Earth Sciences, Jilin University, Changchun, Jilin 130061, China: Urban and Environment Science College, Northeast Normal University, Changchun, Jilin 130024, China; Hongri Group Changchun Subsidiary, Changchun, Jilin 130056, China)

【机构】 吉林大学地球科学学院； 宏日草业集团长春公司；

【摘要】 碱尘暴是一种特殊的尘暴类型,在全球范围内有着不同程度的分布.本文利用SEM-EDX和ICP对吉林西部两个采样点的碱尘气溶胶进行分析,获得了碱尘气溶胶样品的矿物组成和常量元素组成.结果表明:样品矿物成份主要是石英(54.9%)和长石(28.3%),其次为碳酸盐(4.4%)和氯盐(2.7%);碱尘的金属元素以Ca,Na为主,含量排序为Ca,Na,Al,Fe,K,Mg,.Ti;吉林西部碱尘气溶胶与普通沙尘气溶胶在矿物组成和元素分布上均有明显差别.大布苏湖碱尘矿物来源于湖盆阶地碎屑沉积物、粉砂粘土碎屑沉积物、湖盆边缘季节性结晶盐.Na元素主要来源于钠长石和食盐;Ca元素来源主要是钙长石、方解石和白云石.更多还原

【Abstract】 As a special type of duststorm, alkaline dust can be found around the world in some extent. Mineralogical and elemental compositions of aerosol concerning alkaline dust are investigated from two experimental sites in western Jilin province, employing SEM-EDX and ICP systems. The results of the measurements are analyzed to explain the special behaviors of alkaline dust in relation to mineralogical and elemental compositions and their origin mainly as follows: 1) quartz, feldspar, carbonate and halite are identified as the most important minerals with the proportion of 54%, 28.3%, 4.4% and 2.7% respectively, 2) the major elements are Ca. Na with a decreasing sequence of the main elements as Ca. Na. Al. Fe. K., Mg, Ti. 3) lake-bed sediments contribute much to mineralogical composition of alkaline dust in Dabusu Lake. Na has two types of origin, namely Na-feldspar and halite. and Ca has three as Ca-feldspar, calcite and dolomite.更多还原