Table 4: The geochemical parameters of rare earth elements (μg/g).
| Test item |
B1 |
B2 |
B3 |
B4 |
B8 |
B9 |
| La |
7.36 |
2.74 |
0.91 |
3.21 |
4.72 |
3.78 |
| Ce |
12.08 |
5.45 |
1.94 |
6.39 |
7.99 |
7.82 |
| Pr |
1.44 |
0.67 |
0.26 |
0.83 |
1.31 |
0.82 |
| Nd |
7.06 |
3.2 |
1.37 |
3.89 |
6.18 |
3.37 |
| Sm |
1.36 |
0.65 |
0.36 |
0.8 |
1.38 |
0.62 |
| Eu |
0.42 |
0.37 |
0.11 |
0.32 |
0.37 |
0.2 |
| Gd |
1.41 |
0.7 |
0.42 |
0.78 |
1.45 |
0.63 |
| Tb |
0.2 |
0.1 |
0.07 |
0.12 |
0.22 |
0.09 |
| Dy |
1.15 |
0.56 |
0.45 |
0.68 |
1.26 |
0.52 |
| Ho |
0.25 |
0.12 |
0.1 |
0.14 |
0.26 |
0.1 |
| Er |
0.78 |
0.35 |
0.28 |
0.41 |
0.78 |
0.3 |
| Tm |
0.11 |
0.05 |
0.04 |
0.06 |
0.1 |
0.04 |
| Yb |
0.75 |
0.3 |
0.23 |
0.39 |
0.73 |
0.27 |
| Lu |
0.12 |
0.04 |
0.03 |
0.06 |
0.11 |
0.04 |
| ∑REE |
34.45 |
15.3 |
6.57 |
18.09 |
26.86 |
18.6 |
| LREE |
29.71 |
13.08 |
4.95 |
15.45 |
21.95 |
16.62 |
| HREE |
4.75 |
2.22 |
1.62 |
2.64 |
4.91 |
1.98 |
| L/HREE |
7.13 |
5.89 |
3.06 |
5.96 |
4.47 |
8.84 |
| LaN/YbN
|
13.05 |
6.17 |
2.67 |
5.74 |
4.37 |
10.14 |
| LaN/SmN
|
2.61 |
2.65 |
1.59 |
2.84 |
2.15 |
3.98 |
| GdN/LuN
|
2.58 |
2.18 |
1.74 |
1.65 |
1.64 |
2.13 |
| δEu |
0.9 |
1.68 |
0.86 |
1.45 |
0.8 |
0.92 |
| δCe |
0.88 |
0.94 |
0.93 |
0.91 |
0.75 |
1.03 |
| δCe/δEu |
0.99 |
0.56 |
1.08 |
0.69 |
0.94 |
1.16 |