| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.981 | 0.412 | 2.195 | 3.736 |
| Arsenic | As (ppm) | 0.675 | 0.153 | 0.316 | 1.014 |
| Calcium | Ca (wt%) | 0.270 | 0.123 | 0.033 | 0.510 |
| Copper | Cu (ppm) | 10.467 | 2.690 | 6.146 | 15.973 |
| Iron | Fe (wt%) | 2.846 | 0.656 | 1.570 | 4.151 |
| Mercury | Hg (ppm) | 0.057 | 0.063 | 0.011 | 0.279 |
| Magnesium | Mg (wt%) | 0.234 | 0.048 | 0.123 | 0.313 |
| Manganese | Mn (ppm) | 412.607 | 74.817 | 213.532 | 537.441 |
| Sodium | Na (wt%) | 0.148 | 0.045 | 0.038 | 0.226 |
| Phosphorus | P (wt%) | 0.099 | 0.068 | 0.025 | 0.302 |
| Lead | Pb (ppm) | 24.675 | 11.440 | 10.764 | 58.719 |
| Selenium | Se (ppm) | 0.136 | 0.039 | 0.101 | 0.278 |
| Titanium | Ti (wt%) | 0.782 | 0.163 | 0.517 | 1.187 |
| Zinc | Zn (ppm) | 36.679 | 6.213 | 20.697 | 48.144 |