| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.518 | 0.787 | 1.841 | 8.731 |
| Arsenic | As (ppm) | 7.712 | 6.445 | 1.403 | 270.476 |
| Calcium | Ca (wt%) | 2.698 | 1.740 | 0.418 | 13.330 |
| Copper | Cu (ppm) | 23.192 | 10.374 | 6.417 | 205.128 |
| Iron | Fe (wt%) | 2.647 | 0.513 | 0.730 | 11.280 |
| Mercury | Hg (ppm) | 0.047 | 0.100 | 0.010 | 1.759 |
| Magnesium | Mg (wt%) | 0.976 | 0.473 | 0.118 | 7.814 |
| Manganese | Mn (ppm) | 684.287 | 172.105 | 233.089 | 1949.930 |
| Sodium | Na (wt%) | 1.242 | 0.266 | 0.218 | 2.735 |
| Phosphorus | P (wt%) | 0.092 | 0.024 | 0.025 | 0.506 |
| Lead | Pb (ppm) | 26.833 | 15.010 | 6.634 | 754.329 |
| Selenium | Se (ppm) | 0.334 | 0.282 | 0.100 | 3.562 |
| Titanium | Ti (wt%) | 0.340 | 0.094 | 0.077 | 1.969 |
| Zinc | Zn (ppm) | 89.870 | 25.939 | 25.322 | 512.957 |