| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.309 | 0.264 | 3.416 | 5.014 |
| Arsenic | As (ppm) | 8.522 | 0.721 | 6.411 | 10.700 |
| Calcium | Ca (wt%) | 0.404 | 0.112 | 0.187 | 0.674 |
| Copper | Cu (ppm) | 19.748 | 5.747 | 8.145 | 43.276 |
| Iron | Fe (wt%) | 3.099 | 0.330 | 2.526 | 4.370 |
| Mercury | Hg (ppm) | 0.059 | 0.014 | 0.031 | 0.130 |
| Magnesium | Mg (wt%) | 0.346 | 0.036 | 0.235 | 0.438 |
| Manganese | Mn (ppm) | 799.292 | 110.200 | 595.736 | 1193.580 |
| Sodium | Na (wt%) | 0.449 | 0.050 | 0.289 | 0.525 |
| Phosphorus | P (wt%) | 0.050 | 0.007 | 0.035 | 0.068 |
| Lead | Pb (ppm) | 38.010 | 12.542 | 16.527 | 95.044 |
| Selenium | Se (ppm) | 0.481 | 0.090 | 0.258 | 0.682 |
| Titanium | Ti (wt%) | 0.292 | 0.028 | 0.204 | 0.342 |
| Zinc | Zn (ppm) | 170.065 | 48.675 | 86.495 | 330.852 |