| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.558 | 0.786 | 2.087 | 5.983 |
| Arsenic | As (ppm) | 5.221 | 1.649 | 2.239 | 8.887 |
| Calcium | Ca (wt%) | 0.219 | 0.024 | 0.164 | 0.289 |
| Copper | Cu (ppm) | 9.218 | 1.885 | 4.114 | 12.972 |
| Iron | Fe (wt%) | 2.707 | 0.446 | 1.584 | 3.724 |
| Mercury | Hg (ppm) | 0.152 | 0.140 | 0.025 | 0.562 |
| Magnesium | Mg (wt%) | 0.268 | 0.061 | 0.173 | 0.458 |
| Manganese | Mn (ppm) | 1092.710 | 594.017 | 459.955 | 2803.540 |
| Sodium | Na (wt%) | 0.191 | 0.074 | 0.055 | 0.436 |
| Phosphorus | P (wt%) | 0.031 | 0.006 | 0.016 | 0.040 |
| Lead | Pb (ppm) | 27.066 | 7.258 | 14.876 | 47.113 |
| Selenium | Se (ppm) | 0.288 | 0.038 | 0.167 | 0.399 |
| Titanium | Ti (wt%) | 0.379 | 0.150 | 0.186 | 0.983 |
| Zinc | Zn (ppm) | 47.006 | 9.457 | 30.231 | 69.784 |