| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.808 | 1.106 | 1.425 | 6.774 |
| Arsenic | As (ppm) | 5.304 | 2.552 | 1.135 | 19.787 |
| Calcium | Ca (wt%) | 2.650 | 1.473 | 0.126 | 8.576 |
| Copper | Cu (ppm) | 12.519 | 4.418 | 3.067 | 31.114 |
| Iron | Fe (wt%) | 1.719 | 0.564 | 0.637 | 4.386 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.005 | 0.068 |
| Magnesium | Mg (wt%) | 0.674 | 0.301 | 0.159 | 2.956 |
| Manganese | Mn (ppm) | 348.188 | 111.314 | 42.591 | 793.654 |
| Sodium | Na (wt%) | 0.419 | 0.242 | 0.056 | 1.056 |
| Phosphorus | P (wt%) | 0.070 | 0.023 | 0.012 | 0.119 |
| Lead | Pb (ppm) | 14.774 | 5.077 | 6.172 | 46.783 |
| Selenium | Se (ppm) | 0.277 | 0.125 | 0.101 | 0.811 |
| Titanium | Ti (wt%) | 0.202 | 0.058 | 0.093 | 0.419 |
| Zinc | Zn (ppm) | 45.556 | 13.055 | 16.217 | 85.306 |