| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.784 | 1.627 | 1.060 | 6.411 |
| Arsenic | As (ppm) | 4.159 | 1.720 | 1.003 | 7.568 |
| Calcium | Ca (wt%) | 0.381 | 0.211 | 0.211 | 1.290 |
| Copper | Cu (ppm) | 12.898 | 6.856 | 1.465 | 61.090 |
| Iron | Fe (wt%) | 1.813 | 0.669 | 0.582 | 3.250 |
| Mercury | Hg (ppm) | 0.053 | 0.049 | 0.010 | 0.199 |
| Magnesium | Mg (wt%) | 0.210 | 0.112 | 0.072 | 0.481 |
| Manganese | Mn (ppm) | 547.725 | 236.783 | 221.000 | 1475.990 |
| Sodium | Na (wt%) | 0.511 | 0.249 | 0.203 | 1.206 |
| Phosphorus | P (wt%) | 0.038 | 0.016 | 0.016 | 0.078 |
| Lead | Pb (ppm) | 50.290 | 15.868 | 17.026 | 75.850 |
| Selenium | Se (ppm) | 0.412 | 0.313 | 0.100 | 1.278 |
| Titanium | Ti (wt%) | 0.398 | 0.182 | 0.112 | 1.500 |
| Zinc | Zn (ppm) | 43.044 | 15.599 | 22.211 | 102.746 |