| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.018 | 0.419 | 1.658 | 4.160 |
| Arsenic | As (ppm) | 5.238 | 1.589 | 2.045 | 10.019 |
| Calcium | Ca (wt%) | 4.723 | 3.720 | 0.275 | 18.674 |
| Copper | Cu (ppm) | 10.513 | 2.463 | 5.991 | 21.351 |
| Iron | Fe (wt%) | 1.347 | 0.197 | 0.825 | 1.888 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.023 |
| Magnesium | Mg (wt%) | 0.309 | 0.069 | 0.141 | 0.465 |
| Manganese | Mn (ppm) | 339.008 | 116.682 | 160.130 | 779.043 |
| Sodium | Na (wt%) | 0.268 | 0.072 | 0.130 | 0.571 |
| Phosphorus | P (wt%) | 0.031 | 0.008 | 0.013 | 0.053 |
| Lead | Pb (ppm) | 21.819 | 3.752 | 12.920 | 29.680 |
| Selenium | Se (ppm) | 0.229 | 0.078 | 0.100 | 0.488 |
| Titanium | Ti (wt%) | 0.227 | 0.024 | 0.156 | 0.318 |
| Zinc | Zn (ppm) | 32.593 | 5.321 | 19.751 | 44.842 |