| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.690 | 0.317 | 3.582 | 5.584 |
| Arsenic | As (ppm) | 6.814 | 2.423 | 2.046 | 12.005 |
| Calcium | Ca (wt%) | 2.179 | 0.675 | 0.639 | 3.944 |
| Copper | Cu (ppm) | 15.530 | 3.620 | 6.436 | 24.804 |
| Iron | Fe (wt%) | 3.149 | 0.418 | 2.149 | 4.353 |
| Mercury | Hg (ppm) | 0.021 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.993 | 0.151 | 0.708 | 1.666 |
| Manganese | Mn (ppm) | 675.282 | 70.137 | 443.275 | 858.188 |
| Sodium | Na (wt%) | 0.975 | 0.155 | 0.762 | 1.404 |
| Phosphorus | P (wt%) | 0.058 | 0.006 | 0.043 | 0.073 |
| Lead | Pb (ppm) | 33.583 | 30.530 | 13.411 | 217.868 |
| Selenium | Se (ppm) | 0.277 | 0.051 | 0.130 | 0.495 |
| Titanium | Ti (wt%) | 0.510 | 0.058 | 0.369 | 0.674 |
| Zinc | Zn (ppm) | 91.722 | 10.995 | 64.192 | 120.054 |