| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.617 | 0.467 | 2.744 | 5.679 |
| Arsenic | As (ppm) | 6.199 | 2.118 | 2.129 | 16.411 |
| Calcium | Ca (wt%) | 2.109 | 1.074 | 0.495 | 6.047 |
| Copper | Cu (ppm) | 12.808 | 2.743 | 6.233 | 18.197 |
| Iron | Fe (wt%) | 1.859 | 0.288 | 1.161 | 2.771 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.013 |
| Magnesium | Mg (wt%) | 1.256 | 0.320 | 0.300 | 2.152 |
| Manganese | Mn (ppm) | 322.002 | 23.446 | 260.803 | 389.673 |
| Sodium | Na (wt%) | 0.729 | 0.137 | 0.499 | 1.084 |
| Phosphorus | P (wt%) | 0.041 | 0.006 | 0.016 | 0.066 |
| Lead | Pb (ppm) | 24.771 | 5.409 | 12.465 | 46.814 |
| Selenium | Se (ppm) | 0.130 | 0.031 | 0.100 | 0.234 |
| Titanium | Ti (wt%) | 0.258 | 0.016 | 0.217 | 0.304 |
| Zinc | Zn (ppm) | 34.632 | 5.820 | 15.648 | 48.931 |