| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.637 | 0.554 | 0.590 | 2.672 |
| Arsenic | As (ppm) | 14.059 | 7.617 | 3.013 | 47.148 |
| Calcium | Ca (wt%) | 1.303 | 1.078 | 0.132 | 4.510 |
| Copper | Cu (ppm) | 13.278 | 7.227 | 5.068 | 32.683 |
| Iron | Fe (wt%) | 2.548 | 1.135 | 0.712 | 6.930 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.596 | 0.564 | 0.037 | 2.385 |
| Manganese | Mn (ppm) | 1220.310 | 755.128 | 300.954 | 4132.810 |
| Sodium | Na (wt%) | 0.050 | 0.021 | 0.016 | 0.102 |
| Phosphorus | P (wt%) | 0.027 | 0.005 | 0.014 | 0.039 |
| Lead | Pb (ppm) | 37.979 | 27.656 | 8.118 | 124.846 |
| Selenium | Se (ppm) | 0.249 | 0.114 | 0.100 | 0.731 |
| Titanium | Ti (wt%) | 0.088 | 0.030 | 0.033 | 0.169 |
| Zinc | Zn (ppm) | 111.856 | 78.917 | 25.631 | 416.680 |