摘要
描述了吉林东部花岗岩风化壳的特征。研究了花岗岩风化过程中主要造岩矿物的变化特点;建立了主要造岩矿物的风化序列。研究了主量元素、微量元素及稀土元素的地球化学行为;探讨了影响风化过程中元素行为的主要因素。计算了风化速率。
The weathering profiles developed on granites in the east of Jilin province can be divided into five horizoins in light of the weathering intensity and mineral assembleges : A-humic top layer; B-intensively weathered layer; C-semi-weathered layer; D - broken bedrocks; E-bedrocks. The degree of leaching of granites is weak, and the weathered mantle is thin. The relative mineral stability from least to most are hornblende, biotite and plagioclasc with high Ca, plagioclase with low Ca, potassium feldspar, quartz. The leached elements are Ca,Na,Mg,K,Al,Si,Sr,Ba,F,La,Pb,U etc, and the enriched elements P,Ti,B, transitional elements, Y,Zr,Nb etc.
