| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 9.914 | 0.903 | 6.565 | 13.575 |
| Arsenic | As (ppm) | 4.199 | 2.143 | 1.432 | 18.325 |
| Calcium | Ca (wt%) | 2.356 | 0.555 | 1.061 | 4.439 |
| Copper | Cu (ppm) | 51.525 | 17.610 | 17.643 | 176.910 |
| Iron | Fe (wt%) | 6.295 | 1.212 | 2.558 | 13.206 |
| Mercury | Hg (ppm) | 0.025 | 0.018 | 0.010 | 0.169 |
| Magnesium | Mg (wt%) | 1.194 | 0.503 | 0.565 | 6.112 |
| Manganese | Mn (ppm) | 1200.070 | 288.650 | 331.876 | 3070.290 |
| Sodium | Na (wt%) | 1.681 | 0.446 | 0.439 | 2.996 |
| Phosphorus | P (wt%) | 0.101 | 0.026 | 0.026 | 0.189 |
| Lead | Pb (ppm) | 14.010 | 2.335 | 6.390 | 29.863 |
| Selenium | Se (ppm) | 0.127 | 0.062 | 0.100 | 0.694 |
| Titanium | Ti (wt%) | 0.712 | 0.143 | 0.383 | 1.571 |
| Zinc | Zn (ppm) | 101.784 | 17.457 | 53.213 | 164.722 |