Spatial Heterogeneity of Rare Earth Elements: Implications for the Topsoil of Regional Ion-Adsorption Type Rare Earth Deposit Areas in Southern China

The migration and spatial distribution characteristics of topsoil rare earth elements (REEs) are significant for the risk assessment external environment. However, REEs in ion-adsorption type element (REE) mining areas is poorly studied. We aimed to determine differences control factors typical mines South Jiangxi, China. Sixty-five samples eighteen profile were collected analyzed their content elucidate autocorrelation heterogeneity using statistical analysis software (IBM SPSS Statistics 26.0.0.0, GS+9.0, Arcgis10.2.0.3348). Moran index showed that positive correlation between sampling points was within range 0–500 m. best fitting models semi-variance variogram exponential model, Gaussian spherical model. sequence structure (C0 + C) Ho > Tb La Pr Nd Sm Gd Tm Lu Dy Er Yb Ce Eu. fractal pattern Eu Nd. This indicated light (LREEs) heavy (HREEs) significantly different from other sediments. study provides new evidence environmental quality situ leaching ionic ores into layer.