| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.626 | 1.077 | 0.473 | 5.289 |
| Arsenic | As (ppm) | 7.510 | 2.352 | 1.220 | 15.380 |
| Calcium | Ca (wt%) | 0.722 | 0.488 | 0.047 | 2.843 |
| Copper | Cu (ppm) | 10.010 | 3.207 | 2.028 | 20.718 |
| Iron | Fe (wt%) | 1.876 | 0.751 | 0.275 | 4.940 |
| Mercury | Hg (ppm) | 0.033 | 0.013 | 0.010 | 0.088 |
| Magnesium | Mg (wt%) | 0.452 | 0.274 | 0.038 | 1.517 |
| Manganese | Mn (ppm) | 617.240 | 260.753 | 105.310 | 1561.820 |
| Sodium | Na (wt%) | 0.075 | 0.035 | 0.016 | 0.208 |
| Phosphorus | P (wt%) | 0.021 | 0.006 | 0.006 | 0.048 |
| Lead | Pb (ppm) | 21.206 | 8.467 | 2.057 | 43.149 |
| Selenium | Se (ppm) | 0.282 | 0.143 | 0.100 | 1.053 |
| Titanium | Ti (wt%) | 0.162 | 0.063 | 0.038 | 0.341 |
| Zinc | Zn (ppm) | 34.371 | 10.875 | 13.591 | 86.077 |