| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.135 | 0.579 | 1.451 | 4.496 |
| Arsenic | As (ppm) | 10.326 | 3.946 | 4.057 | 16.936 |
| Calcium | Ca (wt%) | 0.091 | 0.041 | 0.045 | 0.235 |
| Copper | Cu (ppm) | 3.652 | 1.273 | 2.021 | 9.074 |
| Iron | Fe (wt%) | 2.460 | 0.878 | 0.937 | 3.973 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.019 |
| Magnesium | Mg (wt%) | 0.115 | 0.040 | 0.074 | 0.326 |
| Manganese | Mn (ppm) | 233.056 | 74.569 | 119.407 | 502.296 |
| Sodium | Na (wt%) | 0.197 | 0.144 | 0.028 | 0.496 |
| Phosphorus | P (wt%) | 0.023 | 0.004 | 0.015 | 0.030 |
| Lead | Pb (ppm) | 10.342 | 2.490 | 5.326 | 14.224 |
| Selenium | Se (ppm) | 0.319 | 0.107 | 0.114 | 0.652 |
| Titanium | Ti (wt%) | 0.358 | 0.067 | 0.240 | 0.492 |
| Zinc | Zn (ppm) | 28.285 | 3.856 | 18.861 | 39.129 |