Summary statistical values of REE from Euphrates River sediments. Density values (g/cm3) taken from Gupta and Krishnamurthy [45]. Sediments from Sholkovitz [46]. Calculated εNd and 1000/Sr data from Martin and McCulloch [4]; Burke et al. [1]; Bussy [2]; Akgül et al. [47], +Mensel et al. [48].
(a)
LREE
Density
Max./min. values
Euphrates River (ppm)
Mississippi River
Amazon River
HREE
Density
Max./min. values
Euphrates River (ppm)
Mississippi River
Amazon River
La
6.14
3.4/15.9
8.57
60.8
349
Tb
8.23
0.18/0.47
0.33
—
—
Ce
8.16
7.5/34.4
18.11
125.4
707
Dy
8.55
0.63/3.12
2.17
7.46
39.7
Pr
6.77
0.88/4.46
2.22
—
—
Ho
8.79
0.17/0.63
0.43
—
—
Nd
7.00
5.39/12.1
7.70
56.4
355
Er
9.06
0.43/1.67
1.20
4.94
21.7
Sm
7.52
0.82/4.05
2.14
—
—
Tm
9.32
0.05/0.28
0.17
—
—
Eu
5.24
0.23/0.82
0.57
2.11
10.9
Yb
6.96
0.29/1.59
1.11
3.94
20.5
Gd
7.90
0.44/3.65
2.20
9.86
46.3
Lu
9.84
0.02/0.23
0.15
0.47
3.02
Mean
5.93
—
—
Mean
0.79
—
—
St. deviation
6.18
—
—
St. deviation
0.74
—
—
(b)
The result of isotopic composition of the studied sediments and some examples in the world