摘要
The exposed area of granitoids in China represents about ten percent land area of this country. The total average chemical composition of granitoids in who1e China is calculated with 12, 265 samples. And this total average of the world,s granitoids is also approximately calculated with 15, 790 samples adopted from Daly (1933), Nockolds (1954), Beus (1972) and this paper, by a compositive method of sample mean and regional mean. As based on the background of the world’sgranitoids, the regional characteristics of China,s granitoids are rich in the contents of silica, soda and potash.
The exposed area of granitoids in China represents about ten percent land area of this country. The total average chemical composition of granitoids in who1e China is calculated with 12, 265 samples. And this total average of the world,s granitoids is also approximately calculated with 15, 790 samples adopted from Daly (1933), Nockolds (1954), Beus (1972) and this paper, by a compositive method of sample mean and regional mean. As based on the background of the world’sgranitoids, the regional characteristics of China,s granitoids are rich in the contents of silica, soda and potash.