Assessment of Heavy Metal Pollution Characteristics andEcological Risk in Soils around a Rare Earth Mine in Gannan

Table 5

The geoaccumulation index of the heavy metals in soils.

Sampling time	The average values of geoaccumulation index
	Mn	Cu	Cr	As	Cd	Ni	Pb	Zn
High water period	0.15	−0.51	−1.15	−2.32	−0.15	−0.74	0.74	−0.46
Withered water period	0.10	−0.89	−1.21	−2.23	−0.86	−0.88	0.78	−0.54