| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.298 | 0.270 | 3.490 | 5.017 |
| Arsenic | As (ppm) | 12.839 | 2.599 | 8.543 | 21.063 |
| Calcium | Ca (wt%) | 0.438 | 0.094 | 0.237 | 0.838 |
| Copper | Cu (ppm) | 10.680 | 1.551 | 6.397 | 14.773 |
| Iron | Fe (wt%) | 2.874 | 0.417 | 2.314 | 4.082 |
| Mercury | Hg (ppm) | 0.037 | 0.017 | 0.019 | 0.115 |
| Magnesium | Mg (wt%) | 0.376 | 0.022 | 0.311 | 0.415 |
| Manganese | Mn (ppm) | 667.162 | 84.481 | 469.288 | 953.791 |
| Sodium | Na (wt%) | 0.467 | 0.037 | 0.348 | 0.564 |
| Phosphorus | P (wt%) | 0.045 | 0.003 | 0.037 | 0.054 |
| Lead | Pb (ppm) | 19.936 | 1.998 | 16.982 | 25.962 |
| Selenium | Se (ppm) | 0.376 | 0.097 | 0.170 | 0.556 |
| Titanium | Ti (wt%) | 0.319 | 0.017 | 0.288 | 0.368 |
| Zinc | Zn (ppm) | 71.907 | 6.196 | 58.028 | 86.351 |