| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.446 | 0.608 | 0.372 | 4.123 |
| Arsenic | As (ppm) | 3.681 | 1.284 | 1.095 | 10.825 |
| Calcium | Ca (wt%) | 0.205 | 0.296 | 0.019 | 3.166 |
| Copper | Cu (ppm) | 6.617 | 6.226 | 1.091 | 85.617 |
| Iron | Fe (wt%) | 0.865 | 0.328 | 0.254 | 2.072 |
| Mercury | Hg (ppm) | 0.044 | 0.025 | 0.012 | 0.232 |
| Magnesium | Mg (wt%) | 0.047 | 0.023 | 0.012 | 0.125 |
| Manganese | Mn (ppm) | 157.042 | 55.059 | 37.573 | 503.802 |
| Sodium | Na (wt%) | 0.060 | 0.044 | 0.007 | 0.238 |
| Phosphorus | P (wt%) | 0.030 | 0.013 | 0.005 | 0.104 |
| Lead | Pb (ppm) | 19.892 | 7.836 | 6.048 | 85.939 |
| Selenium | Se (ppm) | 0.336 | 0.148 | 0.105 | 0.936 |
| Titanium | Ti (wt%) | 0.605 | 0.112 | 0.250 | 1.185 |
| Zinc | Zn (ppm) | 20.915 | 10.329 | 4.554 | 108.391 |