| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.729 | 0.190 | 2.323 | 3.343 |
| Arsenic | As (ppm) | 3.482 | 0.354 | 2.815 | 4.322 |
| Calcium | Ca (wt%) | 0.930 | 0.326 | 0.285 | 1.961 |
| Copper | Cu (ppm) | 7.534 | 0.957 | 5.428 | 9.861 |
| Iron | Fe (wt%) | 1.092 | 0.092 | 0.910 | 1.373 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.275 | 0.029 | 0.188 | 0.343 |
| Manganese | Mn (ppm) | 168.103 | 22.449 | 114.553 | 210.884 |
| Sodium | Na (wt%) | 0.311 | 0.024 | 0.199 | 0.343 |
| Phosphorus | P (wt%) | 0.019 | 0.003 | 0.011 | 0.025 |
| Lead | Pb (ppm) | 11.361 | 0.840 | 9.330 | 13.667 |
| Selenium | Se (ppm) | 0.101 | 0.002 | 0.100 | 0.111 |
| Titanium | Ti (wt%) | 0.189 | 0.024 | 0.143 | 0.224 |
| Zinc | Zn (ppm) | 34.476 | 2.681 | 26.290 | 40.501 |