The origin and distribution of soluble salts in the sand seas of northern China
会议名称：《中国科学院地质与地球物理研究所第十届(2010年度)学术年会》
会议日期：2011年
学科分类：070702[理学-海洋化学] 07[理学] 0707[理学-海洋科学]
基 金：Chinese Academy of Sciences(Grant no.:kzcx2-yw-119) National Basic Research Program of China(No.2009CB421306) the National Natural Science Foundation of China(Grant no.:40930105, 40901059) supported this work
关 键 词：Soluble salt Soil property Sedimentation process Arid zone Desert Northern China
摘 要：Based on samples taken from four large sand seas of northern China,this paper first provides basic data about the concentrations and chemistries of soluble salts in deserts of northern China and then discusses the origins and parameters triggering geographical *** total concentration of soluble salts in the aeolian sands of four large sand seas in northern China ranges between 0.14‰and 1.32‰,with the pH of the soluble salts solution (mixing ratio of sand and water 1:5) changing between 8.4 and 9.6,confirming alkaline soil conditions in these *** chloride and bicarbonate are the dominant salts occurring as soluble salts in the aeolian deposits of these sand *** geographical changes of soluble salts’ concentration display a clear correlation with regional climatic parameters,i.e.,precipitation and *** domination of sedimentation of soluble salts in the aeolian sands deposited via atmospheric processes is discussed,which are heavily associated with dry *** mean percentages of Na and Cl,derived from dry depositions,are estimated to be90%in both Badain Jaran and Taklamakan deserts.