| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.853 | 0.669 | 5.272 | 8.513 |
| Arsenic | As (ppm) | 1.043 | 0.258 | 0.462 | 1.461 |
| Calcium | Ca (wt%) | 0.886 | 0.311 | 0.379 | 1.968 |
| Copper | Cu (ppm) | 9.609 | 1.759 | 5.457 | 14.213 |
| Iron | Fe (wt%) | 2.745 | 0.388 | 1.815 | 3.590 |
| Mercury | Hg (ppm) | 0.045 | 0.040 | 0.019 | 0.295 |
| Magnesium | Mg (wt%) | 0.352 | 0.101 | 0.208 | 0.629 |
| Manganese | Mn (ppm) | 615.706 | 217.743 | 135.802 | 1478.300 |
| Sodium | Na (wt%) | 0.830 | 0.206 | 0.456 | 1.511 |
| Phosphorus | P (wt%) | 0.036 | 0.008 | 0.019 | 0.068 |
| Lead | Pb (ppm) | 35.311 | 3.187 | 24.197 | 43.140 |
| Selenium | Se (ppm) | 0.162 | 0.024 | 0.100 | 0.199 |
| Titanium | Ti (wt%) | 0.666 | 0.101 | 0.484 | 0.992 |
| Zinc | Zn (ppm) | 38.809 | 4.380 | 25.918 | 50.149 |