| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.545 | 0.556 | 1.187 | 4.824 |
| Arsenic | As (ppm) | 2.270 | 1.098 | 0.398 | 6.822 |
| Calcium | Ca (wt%) | 0.194 | 0.126 | 0.046 | 0.568 |
| Copper | Cu (ppm) | 9.976 | 2.932 | 1.669 | 17.654 |
| Iron | Fe (wt%) | 3.264 | 0.541 | 1.093 | 5.531 |
| Mercury | Hg (ppm) | 0.034 | 0.005 | 0.015 | 0.057 |
| Magnesium | Mg (wt%) | 0.144 | 0.042 | 0.054 | 0.317 |
| Manganese | Mn (ppm) | 436.458 | 91.562 | 201.927 | 821.845 |
| Sodium | Na (wt%) | 0.144 | 0.075 | 0.056 | 0.528 |
| Phosphorus | P (wt%) | 0.014 | 0.006 | 0.003 | 0.044 |
| Lead | Pb (ppm) | 19.744 | 2.759 | 5.013 | 26.112 |
| Selenium | Se (ppm) | 0.203 | 0.067 | 0.103 | 0.404 |
| Titanium | Ti (wt%) | 0.673 | 0.130 | 0.165 | 1.118 |
| Zinc | Zn (ppm) | 39.246 | 8.528 | 11.740 | 64.118 |