| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.729 | 0.317 | 0.903 | 2.508 |
| Arsenic | As (ppm) | 4.542 | 0.956 | 2.528 | 9.870 |
| Calcium | Ca (wt%) | 0.243 | 0.170 | 0.068 | 1.301 |
| Copper | Cu (ppm) | 6.254 | 2.482 | 1.016 | 26.371 |
| Iron | Fe (wt%) | 1.399 | 0.342 | 0.753 | 2.458 |
| Mercury | Hg (ppm) | 0.042 | 0.011 | 0.021 | 0.086 |
| Magnesium | Mg (wt%) | 0.107 | 0.028 | 0.049 | 0.170 |
| Manganese | Mn (ppm) | 772.739 | 268.917 | 274.703 | 2232.830 |
| Sodium | Na (wt%) | 0.080 | 0.017 | 0.038 | 0.125 |
| Phosphorus | P (wt%) | 0.049 | 0.014 | 0.019 | 0.095 |
| Lead | Pb (ppm) | 13.025 | 4.712 | 8.096 | 45.069 |
| Selenium | Se (ppm) | 0.323 | 0.073 | 0.121 | 0.583 |
| Titanium | Ti (wt%) | 0.185 | 0.060 | 0.063 | 0.380 |
| Zinc | Zn (ppm) | 67.099 | 15.216 | 25.469 | 130.431 |