| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.375 | 0.749 | 1.802 | 6.562 |
| Arsenic | As (ppm) | 5.443 | 1.667 | 2.239 | 14.771 |
| Calcium | Ca (wt%) | 2.772 | 1.453 | 0.867 | 7.932 |
| Copper | Cu (ppm) | 12.022 | 2.515 | 4.272 | 22.007 |
| Iron | Fe (wt%) | 1.840 | 0.390 | 0.602 | 3.250 |
| Mercury | Hg (ppm) | 0.031 | 0.102 | 0.010 | 1.654 |
| Magnesium | Mg (wt%) | 1.132 | 0.534 | 0.330 | 3.092 |
| Manganese | Mn (ppm) | 339.888 | 91.520 | 118.087 | 812.720 |
| Sodium | Na (wt%) | 0.628 | 0.200 | 0.181 | 1.731 |
| Phosphorus | P (wt%) | 0.069 | 0.014 | 0.027 | 0.140 |
| Lead | Pb (ppm) | 13.826 | 2.319 | 7.631 | 24.499 |
| Selenium | Se (ppm) | 0.371 | 0.160 | 0.102 | 1.406 |
| Titanium | Ti (wt%) | 0.242 | 0.049 | 0.078 | 0.505 |
| Zinc | Zn (ppm) | 46.774 | 9.707 | 23.721 | 91.697 |