| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.930 | 0.521 | 3.224 | 7.172 |
| Arsenic | As (ppm) | 6.052 | 1.691 | 2.955 | 14.059 |
| Calcium | Ca (wt%) | 2.792 | 1.167 | 0.549 | 10.561 |
| Copper | Cu (ppm) | 14.947 | 4.307 | 4.593 | 73.195 |
| Iron | Fe (wt%) | 2.114 | 0.292 | 1.387 | 3.515 |
| Mercury | Hg (ppm) | 0.025 | 0.010 | 0.010 | 0.212 |
| Magnesium | Mg (wt%) | 1.212 | 0.359 | 0.459 | 3.012 |
| Manganese | Mn (ppm) | 367.518 | 148.907 | 156.215 | 1606.040 |
| Sodium | Na (wt%) | 0.642 | 0.149 | 0.312 | 1.274 |
| Phosphorus | P (wt%) | 0.067 | 0.010 | 0.043 | 0.096 |
| Lead | Pb (ppm) | 18.486 | 3.579 | 8.329 | 34.127 |
| Selenium | Se (ppm) | 0.472 | 0.236 | 0.106 | 1.982 |
| Titanium | Ti (wt%) | 0.219 | 0.023 | 0.145 | 0.314 |
| Zinc | Zn (ppm) | 59.937 | 16.366 | 32.189 | 192.677 |