| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.029 | 0.943 | 2.184 | 6.419 |
| Arsenic | As (ppm) | 8.362 | 2.349 | 4.773 | 23.931 |
| Calcium | Ca (wt%) | 1.496 | 0.938 | 0.385 | 5.566 |
| Copper | Cu (ppm) | 10.766 | 2.582 | 6.462 | 27.664 |
| Iron | Fe (wt%) | 1.821 | 0.279 | 1.213 | 2.729 |
| Mercury | Hg (ppm) | 0.025 | 0.007 | 0.012 | 0.058 |
| Magnesium | Mg (wt%) | 0.504 | 0.155 | 0.206 | 0.962 |
| Manganese | Mn (ppm) | 826.665 | 278.578 | 398.570 | 1923.160 |
| Sodium | Na (wt%) | 0.686 | 0.119 | 0.345 | 0.916 |
| Phosphorus | P (wt%) | 0.055 | 0.012 | 0.030 | 0.105 |
| Lead | Pb (ppm) | 18.075 | 3.011 | 12.471 | 40.107 |
| Selenium | Se (ppm) | 0.269 | 0.092 | 0.127 | 0.669 |
| Titanium | Ti (wt%) | 0.364 | 0.041 | 0.259 | 0.446 |
| Zinc | Zn (ppm) | 47.418 | 16.336 | 24.974 | 148.086 |