| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.424 | 1.051 | 0.179 | 5.436 |
| Arsenic | As (ppm) | 1.446 | 0.907 | 0.301 | 5.009 |
| Calcium | Ca (wt%) | 0.035 | 0.021 | 0.007 | 0.156 |
| Copper | Cu (ppm) | 3.026 | 1.961 | 1.003 | 11.050 |
| Iron | Fe (wt%) | 0.562 | 0.321 | 0.166 | 1.899 |
| Mercury | Hg (ppm) | 0.035 | 0.028 | 0.010 | 0.107 |
| Magnesium | Mg (wt%) | 0.027 | 0.020 | 0.004 | 0.103 |
| Manganese | Mn (ppm) | 100.339 | 34.544 | 23.389 | 195.573 |
| Sodium | Na (wt%) | 0.027 | 0.021 | 0.003 | 0.169 |
| Phosphorus | P (wt%) | 0.018 | 0.009 | 0.004 | 0.047 |
| Lead | Pb (ppm) | 16.685 | 5.157 | 8.294 | 36.771 |
| Selenium | Se (ppm) | 0.207 | 0.133 | 0.100 | 0.825 |
| Titanium | Ti (wt%) | 0.384 | 0.054 | 0.225 | 0.621 |
| Zinc | Zn (ppm) | 11.973 | 7.852 | 3.016 | 39.016 |