| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.048 | 0.567 | 0.185 | 3.829 |
| Arsenic | As (ppm) | 2.104 | 1.164 | 0.612 | 7.991 |
| Calcium | Ca (wt%) | 0.050 | 0.037 | 0.015 | 0.281 |
| Copper | Cu (ppm) | 3.194 | 1.541 | 1.060 | 10.124 |
| Iron | Fe (wt%) | 0.463 | 0.245 | 0.088 | 1.685 |
| Mercury | Hg (ppm) | 0.026 | 0.015 | 0.010 | 0.089 |
| Magnesium | Mg (wt%) | 0.035 | 0.032 | 0.006 | 0.256 |
| Manganese | Mn (ppm) | 136.442 | 154.432 | 27.270 | 1225.030 |
| Sodium | Na (wt%) | 0.059 | 0.089 | 0.010 | 0.704 |
| Phosphorus | P (wt%) | 0.013 | 0.008 | 0.003 | 0.042 |
| Lead | Pb (ppm) | 10.378 | 4.738 | 2.142 | 24.747 |
| Selenium | Se (ppm) | 0.242 | 0.131 | 0.100 | 0.808 |
| Titanium | Ti (wt%) | 0.404 | 0.123 | 0.116 | 0.683 |
| Zinc | Zn (ppm) | 10.670 | 5.904 | 3.155 | 42.879 |