吉林东部花岗岩区地下水化学成分及其对岩石风化作用的制约

Chemical Composition of Groundwater from Granitic Areas and Its Constraints to the Granite Weathering in the Eastern of Jilin

在吉林东部花岗岩区地下水化学成分和化学类型研究的基础上,以Na作为参比元素,确定了花岗岩风化过程中22种主量元素和微量元素的相对活动顺序。花岗岩区地下水的地球化学类型属低矿化度(变化范围为69.51×10-6~386.49×10-6,平均值为199.48×10-6)的HCO3-Ca和HCO3-Na-Ca型。花岗岩风化过程中元素的活动性顺序(RM)从大到小依次为:B、Ca、Mo、Zn、Sr、Na、Mg、Cr、Cu、Ni、K、Co、Li、V、As、Ba、Si、Y、Fe、Ti、Al、Mn。风化产物中的粘土矿物主要为高岭土、蒙脱石,反映出本区花岗岩的风化淋滤程度较弱的特点。

Based on research of chemical composition and geochemical types of groundwater from granitic areas in the eastern Jilin Province,the relative mobility of twenty-two major and trace elements during granite weathering has been investigated using sodium as the referenced elements.The geochemical types of groundwater from granitic areas belong to HCO3-Ca type and HCO3-NaCa type with low total dissolved solid(TDS).The relative mobility sequences of major and trace elements from most to least are B,Ca,Mo,Zn,Sr,Na...