| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.940 | 1.330 | 0.277 | 6.393 |
| Arsenic | As (ppm) | 2.917 | 1.063 | 0.833 | 7.947 |
| Calcium | Ca (wt%) | 0.049 | 0.031 | 0.013 | 0.166 |
| Copper | Cu (ppm) | 6.350 | 3.631 | 1.424 | 27.353 |
| Iron | Fe (wt%) | 1.060 | 0.270 | 0.517 | 1.813 |
| Mercury | Hg (ppm) | 0.043 | 0.043 | 0.010 | 0.310 |
| Magnesium | Mg (wt%) | 0.041 | 0.024 | 0.013 | 0.126 |
| Manganese | Mn (ppm) | 333.765 | 95.087 | 117.598 | 682.138 |
| Sodium | Na (wt%) | 0.024 | 0.025 | 0.003 | 0.137 |
| Phosphorus | P (wt%) | 0.030 | 0.016 | 0.011 | 0.116 |
| Lead | Pb (ppm) | 23.452 | 7.052 | 9.038 | 56.183 |
| Selenium | Se (ppm) | 0.316 | 0.151 | 0.104 | 0.834 |
| Titanium | Ti (wt%) | 0.718 | 0.114 | 0.401 | 1.286 |
| Zinc | Zn (ppm) | 22.368 | 8.140 | 11.742 | 67.925 |