| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.854 | 0.348 | 0.795 | 2.898 |
| Arsenic | As (ppm) | 4.593 | 3.222 | 1.380 | 17.612 |
| Calcium | Ca (wt%) | 0.112 | 0.031 | 0.040 | 0.224 |
| Copper | Cu (ppm) | 3.678 | 1.241 | 1.182 | 6.943 |
| Iron | Fe (wt%) | 1.142 | 0.638 | 0.471 | 3.040 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 0.084 | 0.030 | 0.045 | 0.193 |
| Manganese | Mn (ppm) | 135.264 | 40.472 | 78.791 | 309.997 |
| Sodium | Na (wt%) | 0.271 | 0.080 | 0.072 | 0.593 |
| Phosphorus | P (wt%) | 0.011 | 0.004 | 0.005 | 0.025 |
| Lead | Pb (ppm) | 11.481 | 2.626 | 5.992 | 16.706 |
| Selenium | Se (ppm) | 0.228 | 0.075 | 0.100 | 0.398 |
| Titanium | Ti (wt%) | 0.309 | 0.054 | 0.225 | 0.449 |
| Zinc | Zn (ppm) | 20.430 | 7.498 | 9.801 | 47.522 |