| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.943 | 1.105 | 1.821 | 7.386 |
| Arsenic | As (ppm) | 1.529 | 0.325 | 1.028 | 2.301 |
| Calcium | Ca (wt%) | 0.578 | 0.244 | 0.118 | 1.108 |
| Copper | Cu (ppm) | 9.950 | 2.593 | 4.215 | 18.007 |
| Iron | Fe (wt%) | 2.952 | 0.567 | 1.127 | 4.215 |
| Mercury | Hg (ppm) | 0.251 | 0.086 | 0.140 | 0.595 |
| Magnesium | Mg (wt%) | 0.244 | 0.052 | 0.117 | 0.380 |
| Manganese | Mn (ppm) | 679.676 | 138.835 | 250.441 | 1142.320 |
| Sodium | Na (wt%) | 0.305 | 0.100 | 0.079 | 0.562 |
| Phosphorus | P (wt%) | 0.019 | 0.003 | 0.012 | 0.029 |
| Lead | Pb (ppm) | 24.674 | 5.016 | 12.739 | 37.999 |
| Selenium | Se (ppm) | 0.144 | 0.025 | 0.108 | 0.208 |
| Titanium | Ti (wt%) | 0.553 | 0.093 | 0.332 | 0.810 |
| Zinc | Zn (ppm) | 35.811 | 5.267 | 18.286 | 47.841 |