| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.072 | 0.780 | 2.687 | 7.718 |
| Arsenic | As (ppm) | 1.168 | 0.475 | 0.304 | 3.688 |
| Calcium | Ca (wt%) | 0.465 | 0.153 | 0.070 | 0.902 |
| Copper | Cu (ppm) | 8.927 | 3.322 | 2.071 | 20.485 |
| Iron | Fe (wt%) | 2.621 | 0.809 | 1.294 | 4.441 |
| Mercury | Hg (ppm) | 0.218 | 0.104 | 0.031 | 0.633 |
| Magnesium | Mg (wt%) | 0.230 | 0.047 | 0.093 | 0.392 |
| Manganese | Mn (ppm) | 527.727 | 205.251 | 220.844 | 1095.330 |
| Sodium | Na (wt%) | 0.329 | 0.167 | 0.069 | 1.172 |
| Phosphorus | P (wt%) | 0.024 | 0.010 | 0.010 | 0.056 |
| Lead | Pb (ppm) | 19.505 | 3.804 | 9.062 | 29.502 |
| Selenium | Se (ppm) | 0.155 | 0.086 | 0.100 | 0.723 |
| Titanium | Ti (wt%) | 0.578 | 0.162 | 0.221 | 0.996 |
| Zinc | Zn (ppm) | 39.929 | 13.785 | 21.040 | 115.383 |