| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.497 | 0.312 | 4.402 | 6.676 |
| Arsenic | As (ppm) | 1.683 | 0.903 | 0.316 | 8.505 |
| Calcium | Ca (wt%) | 1.009 | 0.298 | 0.480 | 1.863 |
| Copper | Cu (ppm) | 7.677 | 2.072 | 3.108 | 13.822 |
| Iron | Fe (wt%) | 1.745 | 0.520 | 0.594 | 3.315 |
| Mercury | Hg (ppm) | 0.036 | 0.009 | 0.014 | 0.077 |
| Magnesium | Mg (wt%) | 0.217 | 0.070 | 0.082 | 0.454 |
| Manganese | Mn (ppm) | 985.789 | 273.780 | 460.570 | 2094.790 |
| Sodium | Na (wt%) | 1.910 | 0.135 | 1.379 | 2.316 |
| Phosphorus | P (wt%) | 0.064 | 0.023 | 0.023 | 0.155 |
| Lead | Pb (ppm) | 24.075 | 7.477 | 2.204 | 72.066 |
| Selenium | Se (ppm) | 0.115 | 0.020 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.590 | 0.147 | 0.298 | 1.181 |
| Zinc | Zn (ppm) | 50.803 | 21.553 | 12.772 | 141.078 |