| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.990 | 0.307 | 1.401 | 2.843 |
| Arsenic | As (ppm) | 5.832 | 1.151 | 4.393 | 8.130 |
| Calcium | Ca (wt%) | 0.197 | 0.078 | 0.081 | 0.400 |
| Copper | Cu (ppm) | 12.320 | 3.673 | 7.023 | 22.053 |
| Iron | Fe (wt%) | 3.117 | 1.230 | 1.426 | 5.254 |
| Mercury | Hg (ppm) | 0.087 | 0.014 | 0.064 | 0.116 |
| Magnesium | Mg (wt%) | 0.240 | 0.113 | 0.080 | 0.429 |
| Manganese | Mn (ppm) | 328.184 | 120.863 | 139.388 | 576.392 |
| Sodium | Na (wt%) | 0.110 | 0.066 | 0.040 | 0.300 |
| Phosphorus | P (wt%) | 0.179 | 0.113 | 0.028 | 0.527 |
| Lead | Pb (ppm) | 51.764 | 36.154 | 8.129 | 171.047 |
| Selenium | Se (ppm) | 0.485 | 0.115 | 0.315 | 0.796 |
| Titanium | Ti (wt%) | 1.056 | 0.122 | 0.777 | 1.356 |
| Zinc | Zn (ppm) | 65.109 | 12.317 | 45.872 | 110.820 |