| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.272 | 0.726 | 0.330 | 4.533 |
| Arsenic | As (ppm) | 6.697 | 2.425 | 1.976 | 14.357 |
| Calcium | Ca (wt%) | 0.286 | 0.151 | 0.066 | 0.785 |
| Copper | Cu (ppm) | 8.485 | 2.783 | 2.212 | 16.783 |
| Iron | Fe (wt%) | 1.437 | 0.474 | 0.240 | 2.612 |
| Mercury | Hg (ppm) | 0.026 | 0.010 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.154 | 0.043 | 0.084 | 0.358 |
| Manganese | Mn (ppm) | 661.691 | 437.208 | 91.765 | 2301.630 |
| Sodium | Na (wt%) | 0.083 | 0.029 | 0.013 | 0.183 |
| Phosphorus | P (wt%) | 0.047 | 0.029 | 0.005 | 0.154 |
| Lead | Pb (ppm) | 13.365 | 5.006 | 2.449 | 24.918 |
| Selenium | Se (ppm) | 0.524 | 0.570 | 0.104 | 3.628 |
| Titanium | Ti (wt%) | 0.181 | 0.060 | 0.020 | 0.294 |
| Zinc | Zn (ppm) | 42.820 | 18.567 | 8.533 | 120.056 |