Table 4 Average major element abundances (in wt%) of the rocks in mountain ranges in northern China.
Mountain | n | SiO2 | Al2O3 | Na2O | K2O |
|---|---|---|---|---|---|
The southern margin of the Chinese Altai | 26 | 62.97 | 15.65 | 3.12 | 1.56 |
Eastern Tianshan | 9 | 70.11 | 14.99 | 4.17 | 2.92 |
East Kunlun Orogenic belt | 30 | 61.73 | 16.21 | 3.26 | 2.14 |
North Qilian Shan | 29 | 62.94 | 14.7 | 4.04 | 2.02 |
Langshan area | 22 | 56.26 | 16.77 | 2.75 | 1.58 |
Greater Khingan Range | 18 | 68.10 | 15.51 | 3.56 | 4.19 |
