| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.980 | 0.680 | 1.130 | 5.134 |
| Arsenic | As (ppm) | 4.891 | 1.214 | 3.253 | 11.406 |
| Calcium | Ca (wt%) | 0.127 | 0.032 | 0.057 | 0.203 |
| Copper | Cu (ppm) | 9.018 | 1.119 | 6.225 | 12.559 |
| Iron | Fe (wt%) | 1.523 | 0.290 | 0.932 | 2.740 |
| Mercury | Hg (ppm) | 0.043 | 0.017 | 0.020 | 0.103 |
| Magnesium | Mg (wt%) | 0.124 | 0.027 | 0.069 | 0.220 |
| Manganese | Mn (ppm) | 571.365 | 189.245 | 183.192 | 989.240 |
| Sodium | Na (wt%) | 0.065 | 0.020 | 0.015 | 0.109 |
| Phosphorus | P (wt%) | 0.017 | 0.003 | 0.011 | 0.025 |
| Lead | Pb (ppm) | 18.092 | 3.094 | 12.307 | 29.507 |
| Selenium | Se (ppm) | 0.396 | 0.346 | 0.104 | 1.948 |
| Titanium | Ti (wt%) | 0.200 | 0.031 | 0.117 | 0.313 |
| Zinc | Zn (ppm) | 36.372 | 7.419 | 20.395 | 56.084 |