| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.370 | 0.445 | 6.497 | 8.888 |
| Arsenic | As (ppm) | 3.104 | 0.517 | 1.823 | 5.075 |
| Calcium | Ca (wt%) | 2.410 | 0.269 | 1.804 | 3.211 |
| Copper | Cu (ppm) | 16.576 | 5.729 | 5.318 | 59.752 |
| Iron | Fe (wt%) | 3.869 | 0.601 | 2.346 | 5.448 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.976 | 0.120 | 0.548 | 1.338 |
| Manganese | Mn (ppm) | 685.479 | 77.678 | 440.266 | 910.036 |
| Sodium | Na (wt%) | 1.984 | 0.147 | 1.580 | 2.624 |
| Phosphorus | P (wt%) | 0.090 | 0.020 | 0.045 | 0.185 |
| Lead | Pb (ppm) | 18.860 | 4.408 | 6.588 | 31.944 |
| Selenium | Se (ppm) | 0.124 | 0.043 | 0.100 | 0.390 |
| Titanium | Ti (wt%) | 0.549 | 0.103 | 0.335 | 0.892 |
| Zinc | Zn (ppm) | 69.630 | 8.384 | 40.779 | 95.102 |