| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.654 | 0.608 | 1.054 | 5.214 |
| Arsenic | As (ppm) | 4.888 | 1.043 | 1.725 | 8.705 |
| Calcium | Ca (wt%) | 1.498 | 1.396 | 0.146 | 11.612 |
| Copper | Cu (ppm) | 7.854 | 1.425 | 4.296 | 14.854 |
| Iron | Fe (wt%) | 1.757 | 0.389 | 0.824 | 5.191 |
| Mercury | Hg (ppm) | 0.014 | 0.003 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.213 | 0.079 | 0.058 | 0.579 |
| Manganese | Mn (ppm) | 518.189 | 223.598 | 153.019 | 1795.940 |
| Sodium | Na (wt%) | 0.191 | 0.085 | 0.061 | 0.622 |
| Phosphorus | P (wt%) | 0.028 | 0.007 | 0.013 | 0.075 |
| Lead | Pb (ppm) | 15.228 | 5.340 | 4.153 | 55.373 |
| Selenium | Se (ppm) | 0.235 | 0.060 | 0.113 | 0.584 |
| Titanium | Ti (wt%) | 0.283 | 0.054 | 0.154 | 0.665 |
| Zinc | Zn (ppm) | 39.881 | 20.734 | 14.372 | 172.288 |