| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.076 | 0.450 | 1.680 | 4.628 |
| Arsenic | As (ppm) | 6.618 | 1.176 | 1.927 | 8.949 |
| Calcium | Ca (wt%) | 0.071 | 0.017 | 0.041 | 0.140 |
| Copper | Cu (ppm) | 8.572 | 1.710 | 5.019 | 15.070 |
| Iron | Fe (wt%) | 2.245 | 0.357 | 1.009 | 3.283 |
| Mercury | Hg (ppm) | 0.090 | 0.135 | 0.011 | 0.888 |
| Magnesium | Mg (wt%) | 0.192 | 0.051 | 0.096 | 0.401 |
| Manganese | Mn (ppm) | 520.593 | 186.976 | 146.813 | 1291.920 |
| Sodium | Na (wt%) | 0.136 | 0.027 | 0.071 | 0.241 |
| Phosphorus | P (wt%) | 0.028 | 0.005 | 0.016 | 0.041 |
| Lead | Pb (ppm) | 22.303 | 5.486 | 12.284 | 50.922 |
| Selenium | Se (ppm) | 0.431 | 0.089 | 0.201 | 0.695 |
| Titanium | Ti (wt%) | 0.208 | 0.020 | 0.144 | 0.264 |
| Zinc | Zn (ppm) | 49.219 | 6.962 | 30.145 | 68.915 |