| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.401 | 1.247 | 6.570 | 12.011 |
| Arsenic | As (ppm) | 6.932 | 3.666 | 3.256 | 27.373 |
| Calcium | Ca (wt%) | 1.269 | 0.298 | 0.534 | 2.095 |
| Copper | Cu (ppm) | 71.562 | 54.817 | 14.257 | 308.140 |
| Iron | Fe (wt%) | 5.063 | 1.043 | 3.316 | 9.137 |
| Mercury | Hg (ppm) | 0.172 | 0.107 | 0.025 | 0.631 |
| Magnesium | Mg (wt%) | 0.796 | 0.113 | 0.548 | 1.235 |
| Manganese | Mn (ppm) | 1112.300 | 362.486 | 628.029 | 2519.060 |
| Sodium | Na (wt%) | 1.410 | 0.336 | 0.571 | 2.372 |
| Phosphorus | P (wt%) | 0.083 | 0.023 | 0.032 | 0.155 |
| Lead | Pb (ppm) | 21.869 | 17.193 | 5.693 | 168.304 |
| Selenium | Se (ppm) | 0.515 | 0.332 | 0.104 | 1.728 |
| Titanium | Ti (wt%) | 0.768 | 0.110 | 0.526 | 1.208 |
| Zinc | Zn (ppm) | 104.881 | 19.053 | 75.784 | 170.577 |