| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.274 | 0.509 | 3.073 | 6.271 |
| Arsenic | As (ppm) | 3.006 | 1.632 | 0.502 | 14.213 |
| Calcium | Ca (wt%) | 2.041 | 0.610 | 1.059 | 3.809 |
| Copper | Cu (ppm) | 11.636 | 2.356 | 5.533 | 24.379 |
| Iron | Fe (wt%) | 2.170 | 0.350 | 1.077 | 3.238 |
| Mercury | Hg (ppm) | 0.035 | 0.012 | 0.016 | 0.110 |
| Magnesium | Mg (wt%) | 0.874 | 0.281 | 0.295 | 1.765 |
| Manganese | Mn (ppm) | 740.191 | 170.474 | 410.446 | 1606.020 |
| Sodium | Na (wt%) | 1.170 | 0.218 | 0.702 | 2.235 |
| Phosphorus | P (wt%) | 0.050 | 0.005 | 0.036 | 0.065 |
| Lead | Pb (ppm) | 27.319 | 3.778 | 15.818 | 39.057 |
| Selenium | Se (ppm) | 0.129 | 0.025 | 0.100 | 0.290 |
| Titanium | Ti (wt%) | 0.536 | 0.118 | 0.225 | 0.924 |
| Zinc | Zn (ppm) | 44.606 | 5.387 | 29.232 | 58.470 |