| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.161 | 0.532 | 2.618 | 5.790 |
| Arsenic | As (ppm) | 7.786 | 4.969 | 4.507 | 35.200 |
| Calcium | Ca (wt%) | 4.178 | 3.096 | 0.926 | 12.800 |
| Copper | Cu (ppm) | 40.386 | 40.924 | 16.956 | 327.000 |
| Iron | Fe (wt%) | 2.110 | 0.626 | 1.340 | 5.306 |
| Mercury | Hg (ppm) | 0.040 | 0.023 | 0.018 | 0.170 |
| Magnesium | Mg (wt%) | 1.019 | 0.507 | 0.604 | 2.609 |
| Manganese | Mn (ppm) | 510.329 | 148.753 | 305.000 | 1230.320 |
| Sodium | Na (wt%) | 0.599 | 0.240 | 0.376 | 2.278 |
| Phosphorus | P (wt%) | 0.088 | 0.015 | 0.060 | 0.165 |
| Lead | Pb (ppm) | 55.288 | 55.335 | 22.976 | 356.000 |
| Selenium | Se (ppm) | 0.352 | 0.226 | 0.100 | 1.700 |
| Titanium | Ti (wt%) | 0.229 | 0.061 | 0.143 | 0.505 |
| Zinc | Zn (ppm) | 78.441 | 24.485 | 50.000 | 228.000 |