| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.776 | 0.631 | 3.041 | 7.151 |
| Arsenic | As (ppm) | 4.464 | 1.187 | 1.456 | 9.748 |
| Calcium | Ca (wt%) | 2.321 | 1.457 | 0.423 | 11.285 |
| Copper | Cu (ppm) | 12.402 | 2.855 | 4.141 | 27.157 |
| Iron | Fe (wt%) | 2.130 | 0.394 | 1.213 | 3.888 |
| Mercury | Hg (ppm) | 0.014 | 0.006 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.626 | 0.204 | 0.269 | 2.280 |
| Manganese | Mn (ppm) | 403.457 | 87.043 | 197.863 | 831.707 |
| Sodium | Na (wt%) | 0.780 | 0.146 | 0.452 | 1.650 |
| Phosphorus | P (wt%) | 0.039 | 0.009 | 0.020 | 0.099 |
| Lead | Pb (ppm) | 23.982 | 15.440 | 12.202 | 185.159 |
| Selenium | Se (ppm) | 0.184 | 0.092 | 0.100 | 0.776 |
| Titanium | Ti (wt%) | 0.255 | 0.045 | 0.162 | 0.451 |
| Zinc | Zn (ppm) | 47.486 | 14.425 | 14.749 | 114.626 |