| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.666 | 0.685 | 3.654 | 6.321 |
| Arsenic | As (ppm) | 1.040 | 0.359 | 0.321 | 1.603 |
| Calcium | Ca (wt%) | 0.415 | 0.155 | 0.127 | 0.694 |
| Copper | Cu (ppm) | 7.475 | 1.493 | 4.357 | 9.959 |
| Iron | Fe (wt%) | 1.716 | 0.412 | 0.872 | 2.432 |
| Mercury | Hg (ppm) | 0.038 | 0.006 | 0.030 | 0.052 |
| Magnesium | Mg (wt%) | 0.159 | 0.046 | 0.075 | 0.239 |
| Manganese | Mn (ppm) | 596.620 | 90.016 | 460.332 | 863.739 |
| Sodium | Na (wt%) | 0.422 | 0.054 | 0.278 | 0.508 |
| Phosphorus | P (wt%) | 0.023 | 0.008 | 0.010 | 0.041 |
| Lead | Pb (ppm) | 34.951 | 11.544 | 22.896 | 63.738 |
| Selenium | Se (ppm) | 0.130 | 0.020 | 0.101 | 0.175 |
| Titanium | Ti (wt%) | 0.525 | 0.075 | 0.362 | 0.648 |
| Zinc | Zn (ppm) | 26.084 | 2.057 | 22.919 | 30.832 |