| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.502 | 0.849 | 0.714 | 6.437 |
| Arsenic | As (ppm) | 3.065 | 1.287 | 0.607 | 10.669 |
| Calcium | Ca (wt%) | 0.156 | 0.186 | 0.032 | 1.490 |
| Copper | Cu (ppm) | 8.267 | 3.694 | 3.140 | 38.986 |
| Iron | Fe (wt%) | 1.508 | 0.720 | 0.395 | 4.654 |
| Mercury | Hg (ppm) | 0.037 | 0.020 | 0.010 | 0.157 |
| Magnesium | Mg (wt%) | 0.222 | 0.160 | 0.050 | 1.180 |
| Manganese | Mn (ppm) | 456.102 | 420.700 | 31.938 | 3172.110 |
| Sodium | Na (wt%) | 0.190 | 0.082 | 0.034 | 0.600 |
| Phosphorus | P (wt%) | 0.025 | 0.012 | 0.007 | 0.104 |
| Lead | Pb (ppm) | 14.390 | 4.106 | 5.030 | 39.535 |
| Selenium | Se (ppm) | 0.239 | 0.070 | 0.102 | 0.519 |
| Titanium | Ti (wt%) | 0.268 | 0.116 | 0.096 | 0.904 |
| Zinc | Zn (ppm) | 35.277 | 18.338 | 9.338 | 256.225 |