| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.837 | 0.819 | 4.971 | 10.951 |
| Arsenic | As (ppm) | 12.714 | 27.668 | 0.487 | 571.304 |
| Calcium | Ca (wt%) | 2.779 | 0.654 | 0.556 | 6.744 |
| Copper | Cu (ppm) | 15.572 | 6.442 | 1.119 | 61.683 |
| Iron | Fe (wt%) | 3.625 | 1.051 | 1.339 | 9.740 |
| Mercury | Hg (ppm) | 0.039 | 0.058 | 0.010 | 0.967 |
| Magnesium | Mg (wt%) | 1.100 | 0.303 | 0.246 | 2.454 |
| Manganese | Mn (ppm) | 665.497 | 222.538 | 183.980 | 1608.750 |
| Sodium | Na (wt%) | 2.133 | 0.333 | 0.878 | 3.595 |
| Phosphorus | P (wt%) | 0.087 | 0.022 | 0.027 | 0.219 |
| Lead | Pb (ppm) | 20.195 | 7.529 | 7.433 | 130.477 |
| Selenium | Se (ppm) | 0.310 | 0.423 | 0.070 | 5.774 |
| Titanium | Ti (wt%) | 0.461 | 0.130 | 0.194 | 1.102 |
| Zinc | Zn (ppm) | 78.843 | 19.731 | 31.070 | 198.815 |