| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.027 | 0.216 | 6.042 | 8.124 |
| Arsenic | As (ppm) | 4.071 | 0.710 | 2.009 | 6.578 |
| Calcium | Ca (wt%) | 2.497 | 0.550 | 1.566 | 5.933 |
| Copper | Cu (ppm) | 19.276 | 5.039 | 8.585 | 38.145 |
| Iron | Fe (wt%) | 3.837 | 0.416 | 3.046 | 5.686 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.009 | 0.020 |
| Magnesium | Mg (wt%) | 1.036 | 0.089 | 0.720 | 1.323 |
| Manganese | Mn (ppm) | 679.632 | 57.719 | 508.970 | 995.070 |
| Sodium | Na (wt%) | 1.850 | 0.231 | 1.270 | 2.497 |
| Phosphorus | P (wt%) | 0.096 | 0.018 | 0.076 | 0.233 |
| Lead | Pb (ppm) | 17.040 | 3.510 | 10.372 | 28.872 |
| Selenium | Se (ppm) | 0.105 | 0.012 | 0.100 | 0.195 |
| Titanium | Ti (wt%) | 0.536 | 0.083 | 0.369 | 0.901 |
| Zinc | Zn (ppm) | 70.551 | 7.032 | 55.104 | 126.961 |