| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.210 | 0.705 | 2.202 | 5.185 |
| Arsenic | As (ppm) | 5.617 | 0.666 | 3.582 | 7.470 |
| Calcium | Ca (wt%) | 0.254 | 0.210 | 0.067 | 1.114 |
| Copper | Cu (ppm) | 27.839 | 17.944 | 11.058 | 111.061 |
| Iron | Fe (wt%) | 2.734 | 1.414 | 1.576 | 8.019 |
| Mercury | Hg (ppm) | 0.049 | 0.007 | 0.018 | 0.084 |
| Magnesium | Mg (wt%) | 0.329 | 0.124 | 0.167 | 0.751 |
| Manganese | Mn (ppm) | 491.590 | 113.968 | 332.404 | 810.284 |
| Sodium | Na (wt%) | 0.254 | 0.101 | 0.109 | 0.579 |
| Phosphorus | P (wt%) | 0.027 | 0.005 | 0.017 | 0.043 |
| Lead | Pb (ppm) | 23.671 | 10.461 | 13.547 | 65.067 |
| Selenium | Se (ppm) | 0.191 | 0.089 | 0.101 | 0.595 |
| Titanium | Ti (wt%) | 0.348 | 0.084 | 0.201 | 0.732 |
| Zinc | Zn (ppm) | 79.351 | 40.178 | 39.587 | 233.838 |