. 2020 Sep 9;10:14827. doi: 10.1038/s41598-020-71924-9

Table 1.

Tracers for two selection steps and reclassification coefficient (%) for scenario 1 with unpaved tracks and scenario 2 without unpaved tracks.

Scenarios	Selection step	Selected tracers	% of correctly classified samples
Scenario 1: unpaved tracks included	Step 1	TN, Al₂O₃, Fe₂O₃, K₂O, MgO, Mn₂O_3, Sr, Rb, Nb, Zr
Scenario 1: unpaved tracks included	Step 2	TN, Al₂O₃, Fe₂O₃, K₂O, MgO, Mn₂O_3, Sr, Nb	80
Scenario 2: unpaved tracks excluded	Step 1	TN, Al₂O₃, Fe₂O₃, K₂O, MgO, Mn₂O_3, Sr, Rb, Nb, Zr
Scenario 2: unpaved tracks excluded	Step 2	TN, Al₂O₃, Fe₂O₃, K₂O, MgO, Mn₂O_3, Sr, Nb	95