| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.371 | 0.811 | 1.476 | 5.971 |
| Arsenic | As (ppm) | 4.123 | 1.019 | 1.484 | 7.885 |
| Calcium | Ca (wt%) | 0.230 | 0.070 | 0.055 | 0.446 |
| Copper | Cu (ppm) | 8.776 | 3.254 | 3.139 | 19.574 |
| Iron | Fe (wt%) | 1.039 | 0.343 | 0.386 | 2.430 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.212 | 0.080 | 0.045 | 0.674 |
| Manganese | Mn (ppm) | 289.914 | 173.381 | 77.918 | 1199.500 |
| Sodium | Na (wt%) | 0.651 | 0.228 | 0.153 | 1.086 |
| Phosphorus | P (wt%) | 0.028 | 0.009 | 0.010 | 0.057 |
| Lead | Pb (ppm) | 21.910 | 8.381 | 4.001 | 68.115 |
| Selenium | Se (ppm) | 0.253 | 0.145 | 0.102 | 1.017 |
| Titanium | Ti (wt%) | 0.241 | 0.034 | 0.144 | 0.359 |
| Zinc | Zn (ppm) | 32.895 | 11.291 | 10.706 | 97.009 |