| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.143 | 0.049 | 0.045 | 0.372 |
| Arsenic | As (ppm) | 0.545 | 0.084 | 0.331 | 0.786 |
| Calcium | Ca (wt%) | 0.131 | 0.101 | 0.013 | 0.639 |
| Copper | Cu (ppm) | 2.242 | 1.590 | 1.026 | 16.152 |
| Iron | Fe (wt%) | 0.056 | 0.024 | 0.004 | 0.131 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.012 | 0.005 | 0.003 | 0.036 |
| Manganese | Mn (ppm) | 15.253 | 6.384 | 4.614 | 39.814 |
| Sodium | Na (wt%) | 0.006 | 0.004 | 0.003 | 0.032 |
| Phosphorus | P (wt%) | 0.029 | 0.020 | 0.004 | 0.159 |
| Lead | Pb (ppm) | 4.141 | 0.920 | 2.089 | 6.660 |
| Selenium | Se (ppm) | 0.109 | 0.014 | 0.100 | 0.181 |
| Titanium | Ti (wt%) | 0.203 | 0.024 | 0.124 | 0.305 |
| Zinc | Zn (ppm) | 5.146 | 4.274 | 1.151 | 43.885 |