| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.680 | 0.787 | 3.311 | 8.465 |
| Arsenic | As (ppm) | 8.311 | 4.744 | 2.569 | 34.687 |
| Calcium | Ca (wt%) | 3.313 | 0.794 | 1.071 | 6.679 |
| Copper | Cu (ppm) | 26.499 | 11.015 | 11.101 | 143.828 |
| Iron | Fe (wt%) | 4.479 | 1.369 | 1.408 | 11.144 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 1.620 | 0.328 | 0.848 | 3.633 |
| Manganese | Mn (ppm) | 752.830 | 229.944 | 221.568 | 1816.880 |
| Sodium | Na (wt%) | 1.360 | 0.309 | 0.424 | 2.184 |
| Phosphorus | P (wt%) | 0.118 | 0.036 | 0.051 | 0.211 |
| Lead | Pb (ppm) | 17.158 | 2.326 | 10.024 | 35.739 |
| Selenium | Se (ppm) | 0.308 | 0.182 | 0.102 | 2.176 |
| Titanium | Ti (wt%) | 0.378 | 0.111 | 0.150 | 1.203 |
| Zinc | Zn (ppm) | 94.575 | 35.360 | 43.081 | 397.019 |