| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.624 | 0.240 | 0.132 | 1.737 |
| Arsenic | As (ppm) | 1.220 | 0.367 | 0.520 | 3.839 |
| Calcium | Ca (wt%) | 0.921 | 1.186 | 0.044 | 9.227 |
| Copper | Cu (ppm) | 13.506 | 12.435 | 1.472 | 72.183 |
| Iron | Fe (wt%) | 0.246 | 0.094 | 0.068 | 0.563 |
| Mercury | Hg (ppm) | 0.018 | 0.005 | 0.010 | 0.041 |
| Magnesium | Mg (wt%) | 0.030 | 0.012 | 0.009 | 0.100 |
| Manganese | Mn (ppm) | 67.365 | 32.674 | 17.709 | 240.238 |
| Sodium | Na (wt%) | 0.003 | 0.001 | 0.003 | 0.008 |
| Phosphorus | P (wt%) | 0.052 | 0.034 | 0.011 | 0.259 |
| Lead | Pb (ppm) | 16.151 | 4.707 | 6.531 | 32.462 |
| Selenium | Se (ppm) | 0.138 | 0.029 | 0.101 | 0.293 |
| Titanium | Ti (wt%) | 0.383 | 0.093 | 0.200 | 0.749 |
| Zinc | Zn (ppm) | 17.439 | 11.151 | 2.327 | 82.464 |