| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.311 | 0.634 | 2.792 | 5.705 |
| Arsenic | As (ppm) | 10.601 | 2.000 | 5.806 | 14.742 |
| Calcium | Ca (wt%) | 10.400 | 3.909 | 3.171 | 22.272 |
| Copper | Cu (ppm) | 14.766 | 1.594 | 11.589 | 19.827 |
| Iron | Fe (wt%) | 1.953 | 0.289 | 1.216 | 2.598 |
| Mercury | Hg (ppm) | 0.033 | 0.006 | 0.011 | 0.050 |
| Magnesium | Mg (wt%) | 0.647 | 0.167 | 0.429 | 1.252 |
| Manganese | Mn (ppm) | 439.851 | 80.793 | 269.483 | 714.158 |
| Sodium | Na (wt%) | 0.193 | 0.035 | 0.097 | 0.286 |
| Phosphorus | P (wt%) | 0.057 | 0.013 | 0.021 | 0.104 |
| Lead | Pb (ppm) | 17.937 | 2.321 | 9.681 | 23.846 |
| Selenium | Se (ppm) | 0.447 | 0.059 | 0.303 | 0.600 |
| Titanium | Ti (wt%) | 0.261 | 0.046 | 0.155 | 0.361 |
| Zinc | Zn (ppm) | 69.873 | 15.242 | 28.639 | 102.061 |