| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.908 | 0.372 | 0.228 | 2.878 |
| Arsenic | As (ppm) | 2.552 | 1.075 | 0.364 | 7.989 |
| Calcium | Ca (wt%) | 0.040 | 0.021 | 0.008 | 0.125 |
| Copper | Cu (ppm) | 3.830 | 1.169 | 1.092 | 7.294 |
| Iron | Fe (wt%) | 0.434 | 0.183 | 0.142 | 1.295 |
| Mercury | Hg (ppm) | 0.031 | 0.010 | 0.011 | 0.085 |
| Magnesium | Mg (wt%) | 0.026 | 0.014 | 0.007 | 0.105 |
| Manganese | Mn (ppm) | 95.424 | 67.788 | 25.441 | 503.262 |
| Sodium | Na (wt%) | 0.027 | 0.035 | 0.003 | 0.257 |
| Phosphorus | P (wt%) | 0.023 | 0.008 | 0.004 | 0.065 |
| Lead | Pb (ppm) | 17.269 | 3.679 | 6.471 | 35.145 |
| Selenium | Se (ppm) | 0.185 | 0.077 | 0.101 | 0.733 |
| Titanium | Ti (wt%) | 0.559 | 0.091 | 0.320 | 0.844 |
| Zinc | Zn (ppm) | 11.151 | 3.887 | 3.428 | 27.060 |