| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.227 | 0.347 | 3.174 | 5.233 |
| Arsenic | As (ppm) | 5.544 | 1.449 | 2.979 | 10.179 |
| Calcium | Ca (wt%) | 4.691 | 2.554 | 0.731 | 10.905 |
| Copper | Cu (ppm) | 18.709 | 8.712 | 9.523 | 58.387 |
| Iron | Fe (wt%) | 1.954 | 0.126 | 1.662 | 2.340 |
| Mercury | Hg (ppm) | 0.027 | 0.017 | 0.010 | 0.079 |
| Magnesium | Mg (wt%) | 0.778 | 0.211 | 0.385 | 1.380 |
| Manganese | Mn (ppm) | 489.241 | 170.295 | 329.112 | 1214.730 |
| Sodium | Na (wt%) | 0.574 | 0.152 | 0.313 | 1.053 |
| Phosphorus | P (wt%) | 0.047 | 0.011 | 0.026 | 0.085 |
| Lead | Pb (ppm) | 23.248 | 7.117 | 15.220 | 47.850 |
| Selenium | Se (ppm) | 0.283 | 0.148 | 0.100 | 0.955 |
| Titanium | Ti (wt%) | 0.217 | 0.021 | 0.179 | 0.279 |
| Zinc | Zn (ppm) | 46.538 | 8.513 | 33.076 | 71.920 |