| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.149 | 0.825 | 0.983 | 4.733 |
| Arsenic | As (ppm) | 5.330 | 1.658 | 1.512 | 8.798 |
| Calcium | Ca (wt%) | 1.574 | 0.534 | 0.152 | 3.275 |
| Copper | Cu (ppm) | 7.866 | 2.541 | 1.173 | 14.994 |
| Iron | Fe (wt%) | 1.192 | 0.373 | 0.211 | 1.939 |
| Mercury | Hg (ppm) | 0.018 | 0.011 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.400 | 0.151 | 0.052 | 0.668 |
| Manganese | Mn (ppm) | 210.817 | 58.263 | 54.605 | 303.958 |
| Sodium | Na (wt%) | 0.510 | 0.159 | 0.225 | 1.036 |
| Phosphorus | P (wt%) | 0.020 | 0.005 | 0.003 | 0.033 |
| Lead | Pb (ppm) | 16.941 | 5.007 | 5.000 | 37.503 |
| Selenium | Se (ppm) | 0.140 | 0.028 | 0.100 | 0.266 |
| Titanium | Ti (wt%) | 0.225 | 0.042 | 0.085 | 0.295 |
| Zinc | Zn (ppm) | 35.384 | 12.682 | 8.301 | 62.262 |