| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.584 | 0.684 | 3.754 | 7.141 |
| Arsenic | As (ppm) | 5.397 | 1.906 | 2.489 | 14.229 |
| Calcium | Ca (wt%) | 1.865 | 1.216 | 0.428 | 6.846 |
| Copper | Cu (ppm) | 21.452 | 8.188 | 8.209 | 61.066 |
| Iron | Fe (wt%) | 2.779 | 0.889 | 1.209 | 5.596 |
| Mercury | Hg (ppm) | 0.030 | 0.013 | 0.010 | 0.096 |
| Magnesium | Mg (wt%) | 0.791 | 0.436 | 0.309 | 2.522 |
| Manganese | Mn (ppm) | 527.811 | 202.040 | 156.360 | 1183.960 |
| Sodium | Na (wt%) | 0.876 | 0.210 | 0.227 | 1.511 |
| Phosphorus | P (wt%) | 0.061 | 0.016 | 0.037 | 0.103 |
| Lead | Pb (ppm) | 32.626 | 13.951 | 11.820 | 93.039 |
| Selenium | Se (ppm) | 0.412 | 0.151 | 0.103 | 0.986 |
| Titanium | Ti (wt%) | 0.284 | 0.051 | 0.152 | 0.418 |
| Zinc | Zn (ppm) | 77.207 | 23.371 | 35.632 | 143.762 |