生态学杂志2013，Vol.32Issue(4)：1006-1016,11.
寒温带流域硅酸盐岩的风化特征——以嫩江为例
Characteristics of silicate rock weathering in cold temperate zone: A case study of Nenjiang River, China
摘要
Abstract
We determined the concentrations of major ions ( Ca2+ , Mg +, Na+ , K+ , and HCO-3 , SO2-4, and Cl-) in the waters of Nenjiang River system, China, analyzed the relative contributions of chemical weathering of different kinds of rocks, atmospheric input, and human input to the total dissolved solutes, and estimated the chemical weathering rates of different kinds of rocks and associated atmospheric CO2 consumption rates in the whole basin and each sub-basin. The water of the Nenjiang River system was weakly alkaline, with an average pH of 7. 5 , calcium was the dominant cation, accounting for 50% of the total cations, and HCo3- was the most abundant anion, accounting for 85% of the total anions. The dissolved cations in the waters were mainly originated from silicate weathering (～38% ) and carbonate weathering (～32% ) , and from the dissolution of evaporates ( ～25% ) , human activities (～5%) , and atmospheric precipitation input ( < 1 % ). The average chemical weathering rate of silicate rock in the basin was approximately 1. 37 t · km-2 · a-1 (total dissolved solids of silicate rock) , and the associated atmospheric CO2 consumption rate was about 40. l×103 mol · km-2 · a-1.关键词
寒温带/嫩江流域/硅酸盐岩风化/CO2消耗Key words
cold temperate zone/ Nenjiang River basin/ silicate rocks weathering/ CO2 consumption分类
天文与地球科学引用本文复制引用
刘宝剑,赵志琦,李思亮,刘丛强,张干,胡健,丁虎,章倬君..寒温带流域硅酸盐岩的风化特征——以嫩江为例[J].生态学杂志,2013,32(4):1006-1016,11.基金项目
中国科学院重要方向项目(KZCX2-EW-102)和国家自然科学基金项目(41130536和41173030)资助. （KZCX2-EW-102）
