|
|
|
|
|
|
|
| SiO2 |
75.67
|
70.92
|
68.68
|
72.11
|
73.91
|
| TiO2 |
0.03
|
0.31
|
0.47
|
0.29
|
0.16
|
| Al2O3 |
13.73
|
15.16
|
15.62
|
14.35
|
14.43
|
| Fe2O3 |
0.47
|
2.12
|
2.86
|
2.46
|
1.02
|
| MnO |
0.09
|
0.06
|
0.05
|
0.07
|
0.05
|
| MgO |
0.02
|
0.64
|
1.23
|
0.75
|
0.27
|
| CaO |
0.70
|
1.99
|
2.64
|
2.17
|
1.18
|
| Na2O |
4.60
|
4.92
|
5.19
|
3.98
|
4.01
|
| K2O |
4.63
|
3.73
|
3.06
|
3.72
|
4.92
|
| P2O5 |
0.04
|
0.14
|
0.19
|
0.10
|
0.04
|
Table 6: Trace and Rare Earth Element Abundaces of the Rolla Basement Terrane
|
|
|
|
|
|
|
| Ni |
1
|
2
|
10
|
6
|
2
|
| Rb |
147
|
69
|
55
|
104
|
198
|
| Sr |
69
|
814
|
678
|
350
|
220
|
| Ba |
208
|
2468
|
2043
|
1075
|
888
|
| Th |
10
|
11
|
16
|
29
|
34
|
| U |
2.21
|
1.27
|
2.21
|
1.48
|
5.46
|
| Pb |
48
|
30
|
14
|
23
|
67
|
| Zr |
35
|
156
|
217
|
140
|
93
|
| Nb |
18
|
10
|
7
|
5
|
8
|
| Y |
26
|
6
|
5
|
7
|
11
|
| La |
20.2
|
48.4
|
61.8
|
27.6
|
43.4
|
| Ce |
36.4
|
80.0
|
95.8
|
42.7
|
67.1
|
| Nd |
18.5
|
29.9
|
34.2
|
17.4
|
21.4
|
| Sm |
5.69
|
4.43
|
4.47
|
2.51
|
3.66
|
| Eu |
0.65
|
1.31
|
1.27
|
0.63
|
0.59
|
| Gd |
6.05
|
2.82
|
2.46
|
1.77
|
2.69
|
| Dy |
9.14
|
1.49
|
1.27
|
0.64
|
2.10
|
| Er |
5.36
|
0.64
|
0.52
|
0.27
|
1.09
|
| Yb |
5.36
|
0.54
|
0.41
|
0.21
|
1.00
|
Table 7: Isotopic Ratios of the Rolla Basement Terrane
|
|
|
|
|
|
|
| 87Sr/86Sr |
0.764478
|
0.709028
|
0.708630
|
0.730630
|
0.727068
|
| 143Nd/144Nd |
0.511398
|
0.511270
|
0.511368
|
0.510747
|
0.512052
|
| 206Pb/204Pb |
18.598
|
16.926
|
17.625
|
17.472
|
19.035
|
| 207Pb/204Pb |
16.026
|
15.622
|
15.672
|
15.811
|
15.709
|
| 208Pb/204Pb |
39.746
|
37.804
|
38.661
|
41.358
|
38.954
|
| d18O |
+9.76
|
+8.36
|
+8.06
|
+8.00
|
+8.50
|
X36 = foliated granitic basement; X137 = granite; X37 = fine grained granitic basement; X135 = biotite gneiss; X139 = leucocratic gneiss.