| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.675 | 0.290 | 4.846 | 6.391 |
| Arsenic | As (ppm) | 4.044 | 2.326 | 1.731 | 11.112 |
| Calcium | Ca (wt%) | 1.279 | 0.161 | 0.887 | 1.859 |
| Copper | Cu (ppm) | 9.228 | 1.362 | 5.538 | 14.207 |
| Iron | Fe (wt%) | 1.913 | 0.213 | 1.234 | 2.847 |
| Mercury | Hg (ppm) | 0.052 | 0.014 | 0.031 | 0.119 |
| Magnesium | Mg (wt%) | 0.309 | 0.051 | 0.196 | 0.439 |
| Manganese | Mn (ppm) | 864.165 | 126.626 | 476.985 | 1611.630 |
| Sodium | Na (wt%) | 1.748 | 0.128 | 1.471 | 2.025 |
| Phosphorus | P (wt%) | 0.078 | 0.017 | 0.040 | 0.127 |
| Lead | Pb (ppm) | 37.830 | 5.692 | 25.960 | 65.534 |
| Selenium | Se (ppm) | 0.138 | 0.021 | 0.100 | 0.202 |
| Titanium | Ti (wt%) | 0.529 | 0.058 | 0.325 | 0.772 |
| Zinc | Zn (ppm) | 35.536 | 5.648 | 18.956 | 59.586 |