| Elements | Max | Min | Mean | [30] |
| Ba | 0.17 | 0.02 | 0.06 | 0.07 |
| Al | 1.9 | 0.10 | 0.31 | 0.2 |
| Mn | 0.14 | 0.01 | 0.05 | 0.5 |
| Si | 5.1 | 1.00 | 2.58 | 10 |
| Ag | 0.01 | 0.01 | 0.01 | 0.1 |
| As | 0.03 | 0.03 | 0.03 | 0.01 |
| Bi | 0.02 | 0.02 | 0.02 | 0.2 |
| Cr | 0.02 | 0.02 | 0.02 | 0.05 |
| Fe | 0.05 | 0.01 | 0.02 | 2 |
| Li | 0.05 | 0.05 | 0.05 | 0.2 |
| Mo | 0.01 | 0.01 | 0.01 | 0.25 |
| Ni | 0.01 | 0.01 | 0.01 | 0.7 |
| Pb | 0.01 | 0.01 | 0.01 | 0.01 |
| Sb | 0.31 | 0.26 | 0.28 | 0.02 |
| Se | 0.02 | 0.02 | 0.02 | 0.05 |
| Sn | 0.01 | 0.01 | 0.01 | 0.1 |
| Sr | 0.20 | 0.02 | 0.07 | 4 |
| Ti | 0.01 | 0.01 | 0.01 | 0.1 |
| Tl | 0.01 | 0.01 | 0.01 | 0.2 |
| V | 0.01 | 0.01 | 0.01 | 0.2 |
| Zn | 0.09 | 0.03 | 0.05 | 2 |