| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.381 | 1.045 | 2.238 | 6.951 |
| Arsenic | As (ppm) | 6.617 | 1.481 | 2.209 | 12.060 |
| Calcium | Ca (wt%) | 7.088 | 4.138 | 0.641 | 20.742 |
| Copper | Cu (ppm) | 14.040 | 5.005 | 3.913 | 30.634 |
| Iron | Fe (wt%) | 2.077 | 0.616 | 0.760 | 5.241 |
| Mercury | Hg (ppm) | 0.023 | 0.009 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.699 | 0.191 | 0.298 | 1.615 |
| Manganese | Mn (ppm) | 503.146 | 140.871 | 224.662 | 909.971 |
| Sodium | Na (wt%) | 0.423 | 0.475 | 0.077 | 2.164 |
| Phosphorus | P (wt%) | 0.039 | 0.010 | 0.022 | 0.088 |
| Lead | Pb (ppm) | 14.949 | 3.181 | 7.701 | 21.188 |
| Selenium | Se (ppm) | 0.344 | 0.121 | 0.119 | 0.645 |
| Titanium | Ti (wt%) | 0.301 | 0.087 | 0.125 | 0.741 |
| Zinc | Zn (ppm) | 54.060 | 18.804 | 13.542 | 105.031 |