| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.373 | 0.461 | 1.041 | 4.361 |
| Arsenic | As (ppm) | 4.617 | 1.015 | 2.011 | 6.966 |
| Calcium | Ca (wt%) | 0.136 | 0.061 | 0.025 | 0.379 |
| Copper | Cu (ppm) | 9.567 | 4.365 | 3.420 | 25.648 |
| Iron | Fe (wt%) | 1.801 | 0.358 | 0.774 | 3.368 |
| Mercury | Hg (ppm) | 0.044 | 0.011 | 0.013 | 0.078 |
| Magnesium | Mg (wt%) | 0.222 | 0.064 | 0.071 | 0.551 |
| Manganese | Mn (ppm) | 406.541 | 140.202 | 193.011 | 946.962 |
| Sodium | Na (wt%) | 0.126 | 0.030 | 0.027 | 0.236 |
| Phosphorus | P (wt%) | 0.026 | 0.006 | 0.011 | 0.042 |
| Lead | Pb (ppm) | 14.649 | 2.760 | 5.619 | 24.058 |
| Selenium | Se (ppm) | 0.188 | 0.046 | 0.105 | 0.297 |
| Titanium | Ti (wt%) | 0.251 | 0.035 | 0.164 | 0.346 |
| Zinc | Zn (ppm) | 51.788 | 8.019 | 24.944 | 87.758 |