| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.717 | 0.584 | 3.036 | 5.813 |
| Arsenic | As (ppm) | 4.922 | 1.217 | 1.968 | 8.021 |
| Calcium | Ca (wt%) | 2.562 | 1.107 | 0.550 | 5.982 |
| Copper | Cu (ppm) | 11.791 | 2.277 | 7.025 | 18.675 |
| Iron | Fe (wt%) | 1.968 | 0.375 | 1.059 | 2.744 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.804 | 0.254 | 0.268 | 1.684 |
| Manganese | Mn (ppm) | 515.332 | 103.492 | 220.481 | 821.100 |
| Sodium | Na (wt%) | 0.871 | 0.138 | 0.620 | 1.311 |
| Phosphorus | P (wt%) | 0.036 | 0.008 | 0.020 | 0.070 |
| Lead | Pb (ppm) | 20.398 | 2.348 | 16.026 | 27.579 |
| Selenium | Se (ppm) | 0.399 | 0.321 | 0.105 | 2.504 |
| Titanium | Ti (wt%) | 0.347 | 0.144 | 0.175 | 0.828 |
| Zinc | Zn (ppm) | 39.901 | 8.504 | 20.081 | 71.378 |