| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.043 | 0.541 | 1.035 | 4.681 |
| Arsenic | As (ppm) | 8.804 | 2.209 | 3.512 | 16.456 |
| Calcium | Ca (wt%) | 6.529 | 2.815 | 1.294 | 15.957 |
| Copper | Cu (ppm) | 8.669 | 1.323 | 5.092 | 13.929 |
| Iron | Fe (wt%) | 1.793 | 0.363 | 0.636 | 2.442 |
| Mercury | Hg (ppm) | 0.012 | 0.001 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.282 | 0.058 | 0.090 | 0.444 |
| Manganese | Mn (ppm) | 592.068 | 176.207 | 130.797 | 1105.290 |
| Sodium | Na (wt%) | 0.091 | 0.019 | 0.028 | 0.152 |
| Phosphorus | P (wt%) | 0.035 | 0.008 | 0.012 | 0.057 |
| Lead | Pb (ppm) | 19.463 | 3.385 | 5.419 | 32.597 |
| Selenium | Se (ppm) | 0.397 | 0.101 | 0.136 | 0.889 |
| Titanium | Ti (wt%) | 0.183 | 0.027 | 0.098 | 0.263 |
| Zinc | Zn (ppm) | 33.300 | 7.984 | 12.970 | 66.960 |