| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.149 | 0.519 | 1.855 | 5.141 |
| Arsenic | As (ppm) | 5.789 | 1.501 | 2.227 | 11.495 |
| Calcium | Ca (wt%) | 0.576 | 0.941 | 0.030 | 8.177 |
| Copper | Cu (ppm) | 10.835 | 2.799 | 4.237 | 24.084 |
| Iron | Fe (wt%) | 1.992 | 0.347 | 0.792 | 3.031 |
| Mercury | Hg (ppm) | 0.047 | 0.013 | 0.026 | 0.108 |
| Magnesium | Mg (wt%) | 0.325 | 0.126 | 0.080 | 0.914 |
| Manganese | Mn (ppm) | 677.667 | 309.423 | 113.240 | 2646.340 |
| Sodium | Na (wt%) | 0.174 | 0.073 | 0.041 | 0.643 |
| Phosphorus | P (wt%) | 0.031 | 0.006 | 0.015 | 0.051 |
| Lead | Pb (ppm) | 19.308 | 4.223 | 10.292 | 34.654 |
| Selenium | Se (ppm) | 0.282 | 0.085 | 0.109 | 0.630 |
| Titanium | Ti (wt%) | 0.265 | 0.025 | 0.146 | 0.331 |
| Zinc | Zn (ppm) | 64.515 | 18.199 | 23.820 | 153.272 |