| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.353 | 0.776 | 0.592 | 6.243 |
| Arsenic | As (ppm) | 3.921 | 1.833 | 0.680 | 10.552 |
| Calcium | Ca (wt%) | 0.196 | 0.286 | 0.014 | 1.208 |
| Copper | Cu (ppm) | 8.151 | 2.139 | 1.591 | 16.917 |
| Iron | Fe (wt%) | 1.289 | 0.682 | 0.377 | 4.017 |
| Mercury | Hg (ppm) | 0.040 | 0.015 | 0.011 | 0.108 |
| Magnesium | Mg (wt%) | 0.068 | 0.047 | 0.011 | 0.307 |
| Manganese | Mn (ppm) | 343.581 | 520.020 | 54.896 | 3345.610 |
| Sodium | Na (wt%) | 0.162 | 0.215 | 0.006 | 1.106 |
| Phosphorus | P (wt%) | 0.035 | 0.014 | 0.004 | 0.109 |
| Lead | Pb (ppm) | 20.134 | 4.949 | 7.527 | 47.335 |
| Selenium | Se (ppm) | 0.343 | 0.161 | 0.106 | 0.936 |
| Titanium | Ti (wt%) | 0.533 | 0.104 | 0.212 | 0.860 |
| Zinc | Zn (ppm) | 24.241 | 7.865 | 6.482 | 57.430 |