| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.193 | 0.430 | 3.115 | 5.883 |
| Arsenic | As (ppm) | 7.370 | 1.911 | 3.430 | 10.971 |
| Calcium | Ca (wt%) | 5.263 | 3.629 | 0.229 | 13.246 |
| Copper | Cu (ppm) | 18.088 | 3.536 | 12.453 | 27.318 |
| Iron | Fe (wt%) | 2.305 | 0.486 | 1.141 | 3.564 |
| Mercury | Hg (ppm) | 0.174 | 0.078 | 0.073 | 0.426 |
| Magnesium | Mg (wt%) | 0.414 | 0.076 | 0.240 | 0.541 |
| Manganese | Mn (ppm) | 544.564 | 107.363 | 318.392 | 773.654 |
| Sodium | Na (wt%) | 0.168 | 0.027 | 0.092 | 0.258 |
| Phosphorus | P (wt%) | 0.041 | 0.004 | 0.034 | 0.047 |
| Lead | Pb (ppm) | 28.151 | 1.854 | 24.095 | 34.768 |
| Selenium | Se (ppm) | 0.345 | 0.040 | 0.253 | 0.471 |
| Titanium | Ti (wt%) | 0.259 | 0.042 | 0.164 | 0.332 |
| Zinc | Zn (ppm) | 63.158 | 12.835 | 40.588 | 100.655 |