| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.068 | 1.021 | 2.528 | 6.795 |
| Arsenic | As (ppm) | 1.107 | 0.144 | 0.643 | 1.490 |
| Calcium | Ca (wt%) | 1.268 | 0.562 | 0.515 | 2.645 |
| Copper | Cu (ppm) | 9.205 | 2.666 | 3.071 | 13.868 |
| Iron | Fe (wt%) | 2.285 | 0.640 | 1.191 | 4.199 |
| Mercury | Hg (ppm) | 0.026 | 0.006 | 0.015 | 0.040 |
| Magnesium | Mg (wt%) | 0.385 | 0.240 | 0.073 | 0.939 |
| Manganese | Mn (ppm) | 908.384 | 254.966 | 325.568 | 1520.290 |
| Sodium | Na (wt%) | 0.740 | 0.301 | 0.285 | 1.664 |
| Phosphorus | P (wt%) | 0.031 | 0.010 | 0.016 | 0.059 |
| Lead | Pb (ppm) | 18.843 | 2.052 | 15.093 | 27.985 |
| Selenium | Se (ppm) | 0.117 | 0.014 | 0.100 | 0.154 |
| Titanium | Ti (wt%) | 0.403 | 0.065 | 0.271 | 0.669 |
| Zinc | Zn (ppm) | 25.545 | 4.262 | 15.030 | 33.625 |