| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.922 | 0.390 | 2.527 | 4.731 |
| Arsenic | As (ppm) | 7.619 | 1.330 | 3.609 | 12.034 |
| Calcium | Ca (wt%) | 0.133 | 0.039 | 0.070 | 0.239 |
| Copper | Cu (ppm) | 22.869 | 8.454 | 5.773 | 58.457 |
| Iron | Fe (wt%) | 2.431 | 0.294 | 1.501 | 3.179 |
| Mercury | Hg (ppm) | 0.070 | 0.034 | 0.013 | 0.218 |
| Magnesium | Mg (wt%) | 0.302 | 0.070 | 0.138 | 0.537 |
| Manganese | Mn (ppm) | 641.864 | 189.669 | 349.154 | 1465.040 |
| Sodium | Na (wt%) | 0.204 | 0.055 | 0.113 | 0.376 |
| Phosphorus | P (wt%) | 0.038 | 0.006 | 0.018 | 0.050 |
| Lead | Pb (ppm) | 48.530 | 23.031 | 14.395 | 137.874 |
| Selenium | Se (ppm) | 0.690 | 0.442 | 0.108 | 2.353 |
| Titanium | Ti (wt%) | 0.328 | 0.032 | 0.230 | 0.435 |
| Zinc | Zn (ppm) | 126.607 | 41.184 | 46.942 | 299.558 |