| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.725 | 0.800 | 1.246 | 6.280 |
| Arsenic | As (ppm) | 7.185 | 3.381 | 2.149 | 31.270 |
| Calcium | Ca (wt%) | 0.078 | 0.061 | 0.017 | 0.502 |
| Copper | Cu (ppm) | 9.519 | 3.267 | 3.768 | 21.249 |
| Iron | Fe (wt%) | 1.562 | 0.488 | 0.619 | 4.044 |
| Mercury | Hg (ppm) | 0.029 | 0.010 | 0.011 | 0.068 |
| Magnesium | Mg (wt%) | 0.177 | 0.066 | 0.058 | 0.418 |
| Manganese | Mn (ppm) | 302.418 | 116.897 | 83.297 | 1031.460 |
| Sodium | Na (wt%) | 0.126 | 0.054 | 0.038 | 0.285 |
| Phosphorus | P (wt%) | 0.019 | 0.006 | 0.009 | 0.036 |
| Lead | Pb (ppm) | 15.555 | 6.709 | 5.268 | 51.425 |
| Selenium | Se (ppm) | 0.357 | 0.203 | 0.101 | 1.388 |
| Titanium | Ti (wt%) | 0.246 | 0.034 | 0.152 | 0.352 |
| Zinc | Zn (ppm) | 38.676 | 12.860 | 15.120 | 109.988 |