| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.180 | 0.334 | 1.071 | 3.159 |
| Arsenic | As (ppm) | 9.060 | 3.123 | 5.141 | 20.877 |
| Calcium | Ca (wt%) | 0.444 | 0.362 | 0.148 | 2.171 |
| Copper | Cu (ppm) | 6.218 | 1.617 | 4.080 | 19.353 |
| Iron | Fe (wt%) | 2.488 | 0.659 | 1.371 | 4.860 |
| Mercury | Hg (ppm) | 0.038 | 0.004 | 0.030 | 0.052 |
| Magnesium | Mg (wt%) | 0.149 | 0.035 | 0.057 | 0.254 |
| Manganese | Mn (ppm) | 1058.000 | 279.045 | 425.175 | 2209.390 |
| Sodium | Na (wt%) | 0.089 | 0.018 | 0.026 | 0.132 |
| Phosphorus | P (wt%) | 0.135 | 0.162 | 0.024 | 0.933 |
| Lead | Pb (ppm) | 16.592 | 3.548 | 7.264 | 34.454 |
| Selenium | Se (ppm) | 0.397 | 0.085 | 0.206 | 0.684 |
| Titanium | Ti (wt%) | 0.224 | 0.057 | 0.072 | 0.354 |
| Zinc | Zn (ppm) | 68.134 | 9.001 | 50.158 | 94.624 |