| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.763 | 0.722 | 2.486 | 5.468 |
| Arsenic | As (ppm) | 1.068 | 0.492 | 0.350 | 2.748 |
| Calcium | Ca (wt%) | 0.384 | 0.089 | 0.169 | 0.618 |
| Copper | Cu (ppm) | 11.443 | 3.544 | 6.477 | 18.476 |
| Iron | Fe (wt%) | 2.939 | 0.620 | 2.018 | 4.591 |
| Mercury | Hg (ppm) | 0.037 | 0.009 | 0.019 | 0.060 |
| Magnesium | Mg (wt%) | 0.356 | 0.092 | 0.193 | 0.559 |
| Manganese | Mn (ppm) | 558.194 | 49.084 | 484.260 | 714.057 |
| Sodium | Na (wt%) | 0.343 | 0.086 | 0.154 | 0.480 |
| Phosphorus | P (wt%) | 0.020 | 0.008 | 0.009 | 0.042 |
| Lead | Pb (ppm) | 20.085 | 2.697 | 14.257 | 25.761 |
| Selenium | Se (ppm) | 0.166 | 0.049 | 0.106 | 0.298 |
| Titanium | Ti (wt%) | 0.689 | 0.088 | 0.546 | 1.021 |
| Zinc | Zn (ppm) | 54.241 | 10.518 | 34.595 | 77.471 |