| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.823 | 0.788 | 0.570 | 5.300 |
| Arsenic | As (ppm) | 5.148 | 1.578 | 2.115 | 10.683 |
| Calcium | Ca (wt%) | 0.052 | 0.019 | 0.015 | 0.150 |
| Copper | Cu (ppm) | 8.216 | 2.798 | 2.102 | 17.253 |
| Iron | Fe (wt%) | 0.864 | 0.335 | 0.335 | 2.442 |
| Mercury | Hg (ppm) | 0.043 | 0.030 | 0.014 | 0.232 |
| Magnesium | Mg (wt%) | 0.045 | 0.024 | 0.016 | 0.202 |
| Manganese | Mn (ppm) | 149.551 | 61.721 | 54.435 | 472.303 |
| Sodium | Na (wt%) | 0.028 | 0.027 | 0.006 | 0.195 |
| Phosphorus | P (wt%) | 0.030 | 0.009 | 0.014 | 0.101 |
| Lead | Pb (ppm) | 19.836 | 7.145 | 5.768 | 57.419 |
| Selenium | Se (ppm) | 0.238 | 0.103 | 0.106 | 0.654 |
| Titanium | Ti (wt%) | 0.644 | 0.086 | 0.407 | 0.908 |
| Zinc | Zn (ppm) | 27.981 | 18.282 | 8.525 | 146.577 |