| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.780 | 0.433 | 4.024 | 5.624 |
| Arsenic | As (ppm) | 1.368 | 0.197 | 0.955 | 1.956 |
| Calcium | Ca (wt%) | 1.015 | 0.323 | 0.521 | 1.961 |
| Copper | Cu (ppm) | 12.458 | 3.564 | 4.189 | 17.741 |
| Iron | Fe (wt%) | 3.394 | 0.579 | 2.132 | 4.434 |
| Mercury | Hg (ppm) | 0.371 | 0.125 | 0.107 | 0.643 |
| Magnesium | Mg (wt%) | 0.340 | 0.025 | 0.262 | 0.400 |
| Manganese | Mn (ppm) | 660.111 | 69.733 | 514.591 | 834.962 |
| Sodium | Na (wt%) | 0.348 | 0.057 | 0.238 | 0.465 |
| Phosphorus | P (wt%) | 0.023 | 0.010 | 0.009 | 0.050 |
| Lead | Pb (ppm) | 19.548 | 1.991 | 14.287 | 24.849 |
| Selenium | Se (ppm) | 0.211 | 0.088 | 0.100 | 0.447 |
| Titanium | Ti (wt%) | 0.766 | 0.269 | 0.176 | 1.335 |
| Zinc | Zn (ppm) | 35.463 | 6.192 | 24.346 | 50.801 |