| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.643 | 0.588 | 3.622 | 6.606 |
| Arsenic | As (ppm) | 5.672 | 1.323 | 3.551 | 12.608 |
| Calcium | Ca (wt%) | 2.102 | 0.544 | 0.852 | 3.595 |
| Copper | Cu (ppm) | 13.197 | 5.239 | 6.003 | 31.451 |
| Iron | Fe (wt%) | 3.375 | 0.796 | 1.917 | 6.359 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.625 | 0.139 | 0.376 | 1.042 |
| Manganese | Mn (ppm) | 549.312 | 105.083 | 334.922 | 888.358 |
| Sodium | Na (wt%) | 0.966 | 0.157 | 0.445 | 1.324 |
| Phosphorus | P (wt%) | 0.041 | 0.006 | 0.025 | 0.063 |
| Lead | Pb (ppm) | 23.326 | 2.800 | 14.003 | 34.116 |
| Selenium | Se (ppm) | 0.138 | 0.038 | 0.100 | 0.282 |
| Titanium | Ti (wt%) | 0.453 | 0.092 | 0.283 | 0.755 |
| Zinc | Zn (ppm) | 55.595 | 7.909 | 38.059 | 79.995 |