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阐明了作为划分S-型与I-型花岗岩类的特征岩石化学参数:Al_2O_3/(Na_2O+K_2O+CaO)正确的原子数(或离子数)表达式,应是Al/(Na+K+2Ca)而不应是Al/(Na+K+Ca/2)。
The expression of the correct atomic number (or ion number) of Al 2 O 3 / (Na 2 O + K 2 O + CaO) as a characteristic petrochemical parameter for classifying S-type and I-type granites should be elucidated as Al / (Na + K + 2Ca ) Rather than Al / (Na + K + Ca / 2).