| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.738 | 0.700 | 1.035 | 4.818 |
| Arsenic | As (ppm) | 3.103 | 0.563 | 1.667 | 4.674 |
| Calcium | Ca (wt%) | 0.428 | 0.272 | 0.074 | 1.539 |
| Copper | Cu (ppm) | 5.909 | 1.481 | 1.816 | 10.927 |
| Iron | Fe (wt%) | 1.322 | 0.254 | 0.637 | 2.313 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.379 | 0.207 | 0.082 | 1.202 |
| Manganese | Mn (ppm) | 331.394 | 99.028 | 136.291 | 619.614 |
| Sodium | Na (wt%) | 0.287 | 0.150 | 0.050 | 0.604 |
| Phosphorus | P (wt%) | 0.018 | 0.006 | 0.004 | 0.029 |
| Lead | Pb (ppm) | 12.403 | 2.999 | 5.994 | 22.157 |
| Selenium | Se (ppm) | 0.130 | 0.022 | 0.101 | 0.197 |
| Titanium | Ti (wt%) | 0.213 | 0.027 | 0.145 | 0.295 |
| Zinc | Zn (ppm) | 21.915 | 5.337 | 10.747 | 37.733 |