Table 6. Pearson correlation coefficient between physicochemical parameters and REEfractionation proxies of SPM in different regions of the Jiulongjiang River.
The normal distribution of the sample data set were tested via the Shapiro-Wilk test before Pearson correlation analysis. Statistical significant correlation at the level of P < 0.05 (*) and P < 0.01 (**).
| Water pH | TDS | HCO3− | Al | Ca | Fe | K | Mg | Mn | Na | Ti | CIA | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beixi River (Main stream) | ||||||||||||
| LaN | –0.38 | –0.79** | –0.78** | 0.58* | –0.02 | –0.52 | –0.58* | –0.35 | –0.49 | 0.01 | –0.71** | 0.45 |
| CeN | –0.34 | –0.86** | –0.85** | 0.69** | –0.16 | –0.55* | –0.70** | –0.51 | –0.52 | –0.17 | –0.69** | 0.61* |
| PrN | –0.30 | –0.85** | –0.84** | 0.68** | –0.07 | –0.57* | –0.70** | –0.48 | –0.55* | –0.10 | –0.71** | 0.58* |
| NdN | –0.30 | –0.83** | –0.82** | 0.62* | –0.06 | –0.54* | –0.68** | –0.44 | –0.54* | –0.08 | –0.69** | 0.55* |
| SmN | –0.19 | –0.90** | –0.85** | 0.73** | –0.06 | –0.62* | –0.77** | –0.55* | –0.53 | –0.16 | –0.66* | 0.65* |
| EuN | 0.16 | –0.75** | –0.57* | 0.37 | 0.30 | –0.47 | –0.49 | –0.29 | –0.41 | 0.15 | –0.21 | 0.33 |
| GdN | –0.26 | –0.87** | –0.82** | 0.67** | –0.02 | –0.57* | –0.69** | –0.46 | –0.53 | –0.09 | –0.66* | 0.56* |
| TbN | –0.17 | –0.88** | –0.81** | 0.70** | 0.01 | –0.61* | –0.73** | –0.50 | –0.50 | –0.11 | –0.65* | 0.60* |
| DyN | –0.08 | –0.90** | –0.82** | 0.74** | –0.01 | –0.64* | –0.79** | –0.58* | –0.47 | –0.16 | –0.61* | 0.66* |
| HoN | 0.06 | –0.93** | –0.83** | 0.78** | –0.01 | –0.69** | –0.84** | –0.67** | –0.40 | –0.20 | –0.55* | 0.72** |
| ErN | 0.15 | –0.90** | –0.84** | 0.81** | –0.04 | –0.71** | –0.88** | –0.75** | –0.36 | –0.26 | –0.51 | 0.77** |
| TmN | 0.25 | –0.86** | –0.81** | 0.82** | –0.08 | –0.70** | –0.91** | –0.81** | –0.31 | –0.33 | –0.45 | 0.82** |
| YbN | 0.28 | –0.83** | –0.80** | 0.84** | –0.07 | –0.71** | –0.92** | –0.82** | –0.30 | –0.34 | –0.45 | 0.84** |
| LuN | 0.37 | –0.80** | –0.75** | 0.80** | –0.04 | –0.70** | –0.89** | –0.82** | –0.24 | –0.32 | –0.38 | 0.81** |
| (La/Yb)N | –0.69** | –0.19 | –0.21 | –0.01 | 0.02 | –0.02 | 0.09 | 0.30 | –0.37 | 0.27 | –0.52 | –0.17 |
| (La/Sm)N | –0.53 | –0.37 | –0.43 | 0.20 | 0.06 | –0.24 | –0.15 | 0.04 | –0.29 | 0.28 | –0.63* | 0.03 |
| (Sm/Yb)N | –0.74** | 0.07 | 0.11 | –0.30 | 0.01 | 0.25 | 0.38 | 0.58* | –0.36 | 0.27 | –0.27 | –0.41 |
| δCe | 0.22 | 0.39 | 0.36 | –0.18 | –0.44 | 0.34 | 0.23 | –0.10 | 0.39 | –0.47 | 0.60* | 0.01 |
| δEu | 0.50 | 0.37 | 0.55* | –.63* | 0.47 | 0.33 | 0.54* | 0.46 | 0.28 | 0.43 | 0.77** | –0.55* |
| δGd | –0.71** | –0.09 | –0.15 | –0.11 | –0.03 | 0.20 | 0.22 | 0.33 | –0.27 | 0.27 | –0.19 | –0.24 |
| Beixi River (Tributary) | ||||||||||||
| LaN | 0.58 | –0.23 | –0.14 | 0.34 | 0.83* | –0.38 | 0.07 | 0.71 | 0.60 | 0.69 | 0.80 | –0.45 |
| CeN | 0.56 | –0.33 | –0.25 | 0.44 | 0.88* | –0.46 | 0.10 | 0.79 | 0.54 | 0.73 | 0.86* | –0.43 |
| PrN | 0.53 | –0.22 | –0.23 | 0.34 | 0.86* | –0.36 | 0.05 | 0.77 | 0.52 | 0.74 | 0.79 | –0.51 |
| NdN | 0.43 | –0.01 | –0.19 | 0.14 | 0.82* | –0.17 | –0.10 | 0.70 | 0.48 | 0.74 | 0.63 | –0.63 |
| SmN | –0.08 | 0.49 | –0.27 | –0.36 | 0.66 | 0.39 | –0.53 | 0.51 | 0.10 | 0.73 | 0.11 | –0.91* |
| EuN | –0.21 | 0.62 | –0.24 | –0.49 | 0.64 | 0.53 | –0.69 | 0.42 | 0.07 | 0.71 | –0.01 | –0.95** |
| GdN | –0.38 | 0.83* | –0.08 | –0.74 | 0.32 | 0.76 | –0.77 | 0.11 | –0.04 | 0.45 | –0.35 | –0.86* |
| TbN | –0.60 | 0.90* | –0.12 | –0.83* | 0.09 | 0.88* | –0.79 | –0.05 | –0.31 | 0.28 | –0.60 | –0.77 |
| DyN | –0.60 | 0.85* | –0.21 | –0.77 | 0.12 | 0.84* | –0.75 | 0.02 | –0.38 | 0.33 | –0.57 | –0.79 |
| HoN | –0.59 | 0.79 | –0.29 | –0.71 | 0.17 | 0.79 | –0.71 | 0.10 | –0.42 | 0.38 | –0.52 | –0.81 |
| ErN | –0.49 | 0.65 | –0.43 | –0.54 | 0.32 | 0.64 | –0.60 | 0.30 | –0.42 | 0.52 | –0.34 | –0.86* |
| TmN | –0.46 | 0.44 | –0.61 | –0.33 | 0.32 | 0.46 | –0.41 | 0.43 | –0.58 | 0.54 | –0.25 | –0.78 |
| YbN | –0.38 | 0.30 | –0.69 | –0.17 | 0.42 | 0.32 | –0.32 | 0.56 | –0.56 | 0.62 | –0.11 | –0.77 |
| LuN | –0.38 | 0.32 | –0.66 | –0.20 | 0.34 | 0.35 | –0.30 | 0.50 | –0.60 | 0.56 | –0.17 | –0.73 |
| (La/Yb)N | 0.72 | –0.40 | 0.41 | 0.39 | 0.35 | –0.53 | 0.26 | 0.13 | 0.90* | 0.08 | 0.71 | 0.23 |
| (La/Sm)N | 0.81 | –0.73 | 0.18 | 0.73 | 0.36 | –0.83* | 0.58 | 0.32 | 0.73 | 0.10 | 0.875* | 0.37 |
| (Sm/Yb)N | 0.40 | 0.22 | 0.61 | –0.22 | 0.25 | 0.06 | –0.27 | –0.15 | 0.88* | 0.05 | 0.27 | –0.09 |
| δCe | 0.48 | –0.69 | –0.38 | 0.76 | 0.73 | –0.72 | 0.31 | 0.72 | 0.34 | 0.57 | 0.92** | –0.04 |
| δEu | 0.11 | 0.32 | –0.14 | –0.19 | 0.82* | 0.19 | –0.53 | 0.53 | 0.44 | 0.77 | 0.38 | –0.78 |
| δGd | 0.55 | 0.04 | 0.47 | –0.01 | 0.43 | –0.14 | –0.12 | 0.10 | 0.92** | 0.22 | 0.50 | –0.14 |
| Xixi River and Nanxi River | ||||||||||||
| LaN | –0.20 | –0.13 | –0.24 | –0.15 | –0.27 | –0.06 | –0.12 | –0.18 | –0.08 | –0.18 | 0.03 | 0.11 |
| CeN | 0.04 | –0.23 | –0.24 | 0.00 | –0.30 | 0.15 | –0.06 | –0.21 | –0.48 | –0.27 | 0.15 | 0.19 |
| PrN | –0.08 | –0.18 | –0.30 | –0.11 | –0.31 | 0.04 | –0.12 | –0.21 | –0.14 | –0.26 | 0.06 | 0.20 |
| NdN | –0.09 | –0.01 | –0.20 | 0.10 | –0.13 | 0.23 | 0.10 | 0.00 | –0.17 | –0.07 | 0.22 | 0.02 |
| SmN | 0.04 | –0.12 | –0.32 | 0.08 | –0.21 | 0.22 | 0.04 | –0.07 | –0.24 | –0.17 | 0.17 | 0.12 |
| EuN | –0.26 | 0.19 | –0.05 | 0.20 | 0.04 | 0.31 | 0.23 | 0.15 | 0.01 | 0.09 | 0.35 | –0.15 |
| GdN | 0.00 | 0.05 | –0.22 | 0.28 | –0.01 | 0.39 | 0.26 | 0.14 | –0.26 | 0.03 | 0.36 | –0.08 |
| TbN | 0.12 | –0.19 | –0.43 | 0.08 | –0.23 | 0.17 | 0.02 | –0.09 | –0.22 | –0.20 | 0.14 | 0.16 |
| DyN | 0.13 | –0.23 | –0.50 | 0.07 | –0.23 | 0.13 | 0.01 | –0.09 | –0.16 | –0.20 | 0.13 | 0.17 |
| HoN | 0.10 | –0.23 | –0.52 | 0.07 | –0.22 | 0.10 | 0.01 | –0.08 | –0.10 | –0.17 | 0.14 | 0.15 |
| ErN | 0.00 | –0.18 | –0.49 | 0.10 | –0.14 | 0.07 | 0.05 | –0.02 | 0.01 | –0.08 | 0.19 | 0.06 |
| TmN | –0.06 | –0.14 | –0.49 | 0.17 | –0.02 | 0.06 | 0.12 | 0.07 | 0.14 | 0.04 | 0.28 | –0.04 |
| YbN | –0.07 | –0.31 | –0.52 | –0.01 | –0.18 | –0.15 | –0.07 | –0.12 | 0.16 | –0.12 | 0.11 | 0.11 |
| LuN | –0.15 | –0.19 | –0.42 | 0.09 | –0.03 | –0.11 | 0.04 | 0.00 | 0.23 | 0.03 | 0.19 | –0.04 |
| (La/Yb)N | –0.30 | 0.13 | 0.24 | –0.26 | –0.23 | 0.05 | –0.12 | –0.16 | –0.33 | –0.15 | –0.06 | 0.03 |
| (La/Sm)N | –0.60* | –0.08 | 0.05 | –0.53 | –0.23 | –0.56 | –0.36 | –0.27 | 0.29 | –0.06 | –0.24 | –0.01 |
| (Sm/Yb)N | 0.10 | 0.23 | 0.25 | 0.12 | –0.06 | 0.48 | 0.15 | 0.04 | –0.57 | –0.09 | 0.12 | 0.02 |
| δCe | 0.41 | –0.02 | 0.15 | 0.28 | 0.13 | 0.30 | 0.16 | 0.09 | –0.53 | 0.02 | 0.14 | –0.01 |
| δEu | –0.74** | 0.74** | 0.78** | 0.18 | 0.58* | 0.14 | 0.36 | 0.47 | 0.65* | 0.62* | 0.30 | –0.62* |
| δGd | –0.31 | 0.79** | 0.63* | 0.74** | 0.79** | 0.75** | 0.82** | 0.80** | –0.17 | 0.81** | 0.78** | –0.83** |
| Estuary region | ||||||||||||
| LaN | –0.62 | –0.78* | –0.68 | 0.26 | 0.23 | 0.57 | –0.80* | –0.88** | 0.67 | –0.88** | 0.38 | 0.81* |
| CeN | –0.63 | –0.74 | –0.63 | 0.26 | 0.21 | 0.55 | –0.77* | –0.87* | 0.62 | –0.85* | 0.36 | 0.79* |
| PrN | –0.60 | –0.77* | –0.66 | 0.37 | 0.25 | 0.59 | –0.82* | –0.91** | 0.68 | –0.90** | 0.27 | 0.86* |
| NdN | –0.57 | –0.78* | –0.68 | 0.43 | 0.27 | 0.61 | –0.82* | –0.92** | 0.68 | –0.92** | 0.24 | 0.88** |
| SmN | –0.58 | –0.82* | –0.72 | 0.29 | 0.28 | 0.62 | –0.84* | –0.91** | 0.72 | –0.91** | 0.36 | 0.85* |
| EuN | –0.50 | –0.80* | –0.72 | 0.30 | 0.35 | 0.65 | –0.78* | –0.91** | 0.60 | –0.87* | 0.36 | 0.80* |
| GdN | –0.51 | –0.85* | –0.76* | 0.29 | 0.34 | 0.65 | –0.82* | –0.92** | 0.68 | –0.91** | 0.41 | 0.83* |
| TbN | –0.51 | –0.87* | –0.79* | 0.26 | 0.36 | 0.68 | –0.85* | –0.92** | 0.73 | –0.92** | 0.42 | 0.84* |
| DyN | –0.48 | –0.89** | –0.81* | 0.25 | 0.37 | 0.68 | –0.86* | –0.92** | 0.74 | –0.92** | 0.44 | 0.83* |
| HoN | –0.49 | –0.90** | –0.81* | 0.28 | 0.37 | 0.68 | –0.87* | –0.93** | 0.76* | –0.93** | 0.41 | 0.85* |
| ErN | –0.47 | –0.90** | –0.81* | 0.27 | 0.38 | 0.69 | –0.87* | –0.93** | 0.75 | –0.93** | 0.42 | 0.84* |
| TmN | –0.41 | –0.91** | –0.84* | 0.26 | 0.43 | 0.72 | –0.83* | –0.92** | 0.69 | –0.91** | 0.46 | 0.81* |
| YbN | –0.41 | –0.92** | –0.85* | 0.29 | 0.44 | 0.73 | –0.86* | –0.94** | 0.73 | –0.93** | 0.43 | 0.84* |
| LuN | –0.35 | –0.94** | –0.88** | 0.26 | 0.48 | 0.75 | –0.84* | –0.93** | 0.71 | –0.92** | 0.47 | 0.81* |
| (La/Yb)N | –0.36 | 0.89** | 0.94** | –0.26 | –0.85* | –0.86* | 0.66 | 0.70 | –0.59 | 0.67 | –0.33 | –0.56 |
| (La/Sm)N | –0.04 | 0.93** | 0.93** | –0.52 | –0.73 | –0.90** | 0.89** | 0.89** | –.80* | 0.89** | –0.11 | –0.85* |
| (Sm/Yb)N | –0.48 | 0.81* | 0.89** | –0.13 | –0.84* | –0.78* | 0.53 | 0.55 | –0.47 | 0.53 | –0.39 | –0.39 |
| δCe | –0.20 | 0.37 | 0.40 | –0.58 | –0.31 | –0.38 | 0.52 | 0.32 | –0.63 | 0.44 | 0.36 | –0.51 |
| δEu | 0.43 | 0.83* | 0.75 | –0.11 | –0.23 | –0.52 | 0.84* | 0.73 | –0.88** | 0.824* | –0.47 | –0.72 |
| δGd | 0.35 | 0.79* | 0.73 | –0.01 | –0.35 | –0.62 | 0.84* | 0.71 | –0.87* | 0.74 | –0.41 | –0.67 |