| Parameter | Cd | Cr | Cu | Fe | Mn | Ni | Pb | Zn |
| Cd | 1 |
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| Cr | −0.117 | 1 |
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| Cu | 0.765 | −0.609 | 1 |
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| Fe | 0.023 | 0.581 | −0.554 | 1 |
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| Mn | 0.147 | 0.530 | −0.342 | 0.913* | 1 |
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| Ni | −0.626 | −0.180 | −0.521 | 0.391 | 0.369 | 1 |
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| Pb | 0.657 | 0.155 | 0.417 | 0.364 | 0.673 | −0.111 | 1 |
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| Zn | −0.238 | −0.124 | −0.230 | 0.498 | 0.652 | 0.858 | 0.412 | 1 |