| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.950 | 0.846 | 1.264 | 5.237 |
| Arsenic | As (ppm) | 3.101 | 1.173 | 1.218 | 6.890 |
| Calcium | Ca (wt%) | 0.087 | 0.031 | 0.046 | 0.211 |
| Copper | Cu (ppm) | 8.277 | 1.813 | 4.334 | 14.342 |
| Iron | Fe (wt%) | 1.334 | 0.308 | 0.556 | 2.132 |
| Mercury | Hg (ppm) | 0.074 | 0.030 | 0.043 | 0.169 |
| Magnesium | Mg (wt%) | 0.053 | 0.015 | 0.028 | 0.096 |
| Manganese | Mn (ppm) | 318.688 | 144.431 | 119.063 | 774.759 |
| Sodium | Na (wt%) | 0.020 | 0.007 | 0.011 | 0.042 |
| Phosphorus | P (wt%) | 0.028 | 0.006 | 0.020 | 0.048 |
| Lead | Pb (ppm) | 35.522 | 12.820 | 13.326 | 74.781 |
| Selenium | Se (ppm) | 0.333 | 0.089 | 0.118 | 0.618 |
| Titanium | Ti (wt%) | 0.452 | 0.067 | 0.244 | 0.583 |
| Zinc | Zn (ppm) | 26.715 | 5.405 | 10.884 | 41.050 |