| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.744 | 0.329 | 2.073 | 3.585 |
| Arsenic | As (ppm) | 1.102 | 0.315 | 0.340 | 2.111 |
| Calcium | Ca (wt%) | 0.252 | 0.067 | 0.138 | 0.498 |
| Copper | Cu (ppm) | 10.056 | 2.634 | 6.053 | 14.320 |
| Iron | Fe (wt%) | 2.599 | 0.558 | 1.658 | 4.091 |
| Mercury | Hg (ppm) | 0.057 | 0.061 | 0.013 | 0.301 |
| Magnesium | Mg (wt%) | 0.219 | 0.032 | 0.180 | 0.326 |
| Manganese | Mn (ppm) | 345.244 | 76.685 | 212.109 | 486.529 |
| Sodium | Na (wt%) | 0.150 | 0.022 | 0.107 | 0.222 |
| Phosphorus | P (wt%) | 0.084 | 0.055 | 0.017 | 0.294 |
| Lead | Pb (ppm) | 25.570 | 9.010 | 13.591 | 57.303 |
| Selenium | Se (ppm) | 0.175 | 0.070 | 0.103 | 0.458 |
| Titanium | Ti (wt%) | 0.772 | 0.225 | 0.344 | 1.171 |
| Zinc | Zn (ppm) | 33.233 | 5.874 | 23.628 | 46.938 |