| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.564 | 0.834 | 3.062 | 7.415 |
| Arsenic | As (ppm) | 6.917 | 2.338 | 3.300 | 17.019 |
| Calcium | Ca (wt%) | 4.313 | 3.030 | 1.254 | 16.685 |
| Copper | Cu (ppm) | 17.194 | 6.871 | 7.224 | 49.691 |
| Iron | Fe (wt%) | 2.569 | 0.566 | 1.535 | 4.233 |
| Mercury | Hg (ppm) | 0.025 | 0.006 | 0.010 | 0.041 |
| Magnesium | Mg (wt%) | 1.026 | 0.267 | 0.461 | 1.981 |
| Manganese | Mn (ppm) | 436.490 | 133.393 | 200.886 | 831.159 |
| Sodium | Na (wt%) | 0.866 | 0.316 | 0.195 | 1.487 |
| Phosphorus | P (wt%) | 0.072 | 0.020 | 0.040 | 0.141 |
| Lead | Pb (ppm) | 18.192 | 2.782 | 12.084 | 29.964 |
| Selenium | Se (ppm) | 0.426 | 0.128 | 0.102 | 0.785 |
| Titanium | Ti (wt%) | 0.248 | 0.051 | 0.120 | 0.383 |
| Zinc | Zn (ppm) | 61.662 | 12.310 | 35.166 | 104.510 |