| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.632 | 0.482 | 2.467 | 4.673 |
| Arsenic | As (ppm) | 3.767 | 1.606 | 1.656 | 8.832 |
| Calcium | Ca (wt%) | 0.188 | 0.051 | 0.062 | 0.270 |
| Copper | Cu (ppm) | 11.140 | 2.769 | 5.283 | 17.394 |
| Iron | Fe (wt%) | 2.720 | 0.273 | 2.098 | 3.383 |
| Mercury | Hg (ppm) | 0.310 | 0.464 | 0.020 | 2.221 |
| Magnesium | Mg (wt%) | 0.290 | 0.038 | 0.229 | 0.407 |
| Manganese | Mn (ppm) | 779.592 | 222.868 | 321.242 | 1579.190 |
| Sodium | Na (wt%) | 0.166 | 0.045 | 0.093 | 0.280 |
| Phosphorus | P (wt%) | 0.031 | 0.006 | 0.018 | 0.044 |
| Lead | Pb (ppm) | 17.965 | 3.204 | 10.577 | 24.549 |
| Selenium | Se (ppm) | 0.213 | 0.045 | 0.102 | 0.346 |
| Titanium | Ti (wt%) | 0.417 | 0.157 | 0.176 | 0.934 |
| Zinc | Zn (ppm) | 45.112 | 7.575 | 30.628 | 61.120 |