| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.961 | 0.591 | 3.787 | 7.406 |
| Arsenic | As (ppm) | 5.971 | 1.213 | 2.763 | 8.842 |
| Calcium | Ca (wt%) | 0.913 | 0.339 | 0.415 | 2.679 |
| Copper | Cu (ppm) | 65.417 | 106.975 | 4.231 | 634.755 |
| Iron | Fe (wt%) | 3.162 | 0.441 | 1.807 | 4.292 |
| Mercury | Hg (ppm) | 0.077 | 0.025 | 0.021 | 0.136 |
| Magnesium | Mg (wt%) | 0.662 | 0.152 | 0.496 | 1.287 |
| Manganese | Mn (ppm) | 887.532 | 259.481 | 390.137 | 2048.830 |
| Sodium | Na (wt%) | 0.903 | 0.175 | 0.541 | 1.201 |
| Phosphorus | P (wt%) | 0.053 | 0.006 | 0.040 | 0.069 |
| Lead | Pb (ppm) | 60.713 | 46.181 | 18.877 | 302.536 |
| Selenium | Se (ppm) | 0.428 | 0.405 | 0.103 | 2.547 |
| Titanium | Ti (wt%) | 0.421 | 0.095 | 0.246 | 0.797 |
| Zinc | Zn (ppm) | 188.635 | 128.334 | 67.707 | 764.367 |