| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.319 | 0.624 | 1.655 | 4.573 |
| Arsenic | As (ppm) | 6.532 | 2.055 | 2.225 | 10.088 |
| Calcium | Ca (wt%) | 0.098 | 0.032 | 0.048 | 0.258 |
| Copper | Cu (ppm) | 14.253 | 6.350 | 4.491 | 34.107 |
| Iron | Fe (wt%) | 1.994 | 0.541 | 0.807 | 3.291 |
| Mercury | Hg (ppm) | 0.047 | 0.029 | 0.016 | 0.166 |
| Magnesium | Mg (wt%) | 0.252 | 0.058 | 0.111 | 0.426 |
| Manganese | Mn (ppm) | 461.161 | 181.384 | 128.444 | 1167.910 |
| Sodium | Na (wt%) | 0.171 | 0.042 | 0.094 | 0.337 |
| Phosphorus | P (wt%) | 0.033 | 0.011 | 0.013 | 0.071 |
| Lead | Pb (ppm) | 12.003 | 3.683 | 4.177 | 30.006 |
| Selenium | Se (ppm) | 0.580 | 0.220 | 0.214 | 1.165 |
| Titanium | Ti (wt%) | 0.224 | 0.024 | 0.140 | 0.272 |
| Zinc | Zn (ppm) | 67.433 | 33.767 | 19.675 | 258.067 |