| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.419 | 0.799 | 2.502 | 5.845 |
| Arsenic | As (ppm) | 3.493 | 1.261 | 1.520 | 7.480 |
| Calcium | Ca (wt%) | 2.755 | 1.240 | 0.563 | 7.149 |
| Copper | Cu (ppm) | 7.557 | 1.985 | 1.175 | 13.366 |
| Iron | Fe (wt%) | 1.375 | 0.295 | 0.592 | 2.206 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.014 |
| Magnesium | Mg (wt%) | 0.413 | 0.160 | 0.119 | 0.772 |
| Manganese | Mn (ppm) | 287.705 | 59.089 | 128.969 | 455.203 |
| Sodium | Na (wt%) | 1.189 | 0.266 | 0.728 | 2.558 |
| Phosphorus | P (wt%) | 0.028 | 0.011 | 0.005 | 0.052 |
| Lead | Pb (ppm) | 10.628 | 3.646 | 2.124 | 16.975 |
| Selenium | Se (ppm) | 0.119 | 0.023 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.289 | 0.071 | 0.178 | 0.605 |
| Zinc | Zn (ppm) | 36.301 | 9.223 | 14.449 | 59.907 |