| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.029 | 0.531 | 1.453 | 4.675 |
| Arsenic | As (ppm) | 5.675 | 2.566 | 1.829 | 16.621 |
| Calcium | Ca (wt%) | 1.065 | 0.979 | 0.233 | 4.180 |
| Copper | Cu (ppm) | 5.863 | 2.705 | 1.032 | 12.630 |
| Iron | Fe (wt%) | 1.111 | 0.321 | 0.591 | 1.839 |
| Mercury | Hg (ppm) | 0.016 | 0.005 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.175 | 0.054 | 0.084 | 0.337 |
| Manganese | Mn (ppm) | 317.139 | 125.173 | 95.940 | 599.265 |
| Sodium | Na (wt%) | 0.421 | 0.214 | 0.063 | 1.148 |
| Phosphorus | P (wt%) | 0.017 | 0.005 | 0.005 | 0.028 |
| Lead | Pb (ppm) | 17.569 | 10.798 | 6.339 | 75.503 |
| Selenium | Se (ppm) | 0.218 | 0.067 | 0.103 | 0.497 |
| Titanium | Ti (wt%) | 0.299 | 0.059 | 0.186 | 0.587 |
| Zinc | Zn (ppm) | 25.001 | 6.191 | 12.471 | 41.720 |