Table 1 Classes defined for training data with criterions.

From: Hybrid Harris hawks-optimized random forest model for detecting multi-element geochemical anomalies related to mineralization

Criterion

Population

Label

Au + Cu + Sb + Zn + Pb ≥ 3.52

Strong anomaly

4

3.52 > Au + Cu + Sb + Zn + Pb ≥ 3.07

Weak anomaly

3

3.07 > Au + Cu + Sb + Zn + Pb ≥ 2.63

High background

2

2.63 > Au + Cu + Sb + Zn + Pb > 0

Low background

1

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