吉林省中部地区花岗质岩石风化地球化学特征

对吉林省中部地区花岗质岩石及上覆残积土壤进行系统采样分析，研究表生环境中常量元素和微量元素含量变化，确定了花岗质岩石的风化特征及元素活动性规律：土壤中Ti、Mn、Co、Cu、Mo、V和Zr的平均含量高于岩石，而Al₂O₃、CaO、Na₂O、K₂O、Sr、Th和U的平均含量低于岩石，其余元素含量差别不明显；在垂直剖面上，SiO2、Ti、V、Y和Zr的含量变化不明显，Al₂O₃、Ba、Th、U在土壤B层中有明显的富集趋势，U含量在表层明显下降；Mo的含量在土壤C层明显升高，在表层含量有所下降；MgO、K₂O、Na₂O、CaO在土壤O层和A层中含量明显降低；TFe和Mn含量在垂向剖面上没有明显变化。总体上，亲石元素在风化过程中表现出较强的活动性；亲氧元素则相对较为稳定，在表生环境中元素活动性较弱；亲硫元素活动性介于两者之间。

Geochemical Characteristics of Granite Weathering in Central Jilin Province

Through sampling and analyzing of granitic rocks and their overlying residual soil,the content changes of both the major and trace elements at the surface environment have been determined and the characteristics of granite weathering and the rules of element mobilization have been studied.In the soil,the average contents of Ti,Mn,Co,Cu,Mo,V and Zr are higher than those in the rocks,while the average contents of Al2O3,CaO,Na2O,K2O,Sr,Th and U are lower than those in the rocks,and other elements are almost th...