| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.798 | 0.611 | 4.564 | 8.033 |
| Arsenic | As (ppm) | 11.155 | 2.125 | 4.584 | 18.357 |
| Calcium | Ca (wt%) | 0.665 | 0.127 | 0.352 | 1.087 |
| Copper | Cu (ppm) | 15.505 | 2.574 | 8.733 | 26.812 |
| Iron | Fe (wt%) | 2.184 | 0.368 | 1.356 | 3.498 |
| Mercury | Hg (ppm) | 0.033 | 0.007 | 0.012 | 0.068 |
| Magnesium | Mg (wt%) | 0.572 | 0.116 | 0.325 | 1.058 |
| Manganese | Mn (ppm) | 360.094 | 64.171 | 197.355 | 524.703 |
| Sodium | Na (wt%) | 0.784 | 0.097 | 0.457 | 1.094 |
| Phosphorus | P (wt%) | 0.065 | 0.007 | 0.043 | 0.088 |
| Lead | Pb (ppm) | 21.640 | 2.296 | 16.813 | 29.876 |
| Selenium | Se (ppm) | 0.484 | 0.117 | 0.139 | 0.893 |
| Titanium | Ti (wt%) | 0.311 | 0.025 | 0.248 | 0.384 |
| Zinc | Zn (ppm) | 74.228 | 13.280 | 48.093 | 127.209 |