Bristen granite: a highly differentiated, fluorite-bearing A-type granite from the Aar massif, Central Alps, Switzerland

Swiss Journal of Geosciences

Table 8 Composition of fergusonite (sample 1348)

Point	16	17	34	35
Nb₂O₅	42.63	40.19	41.09	41.94
Ta₂O₅	0.95	0.82	0.88	0.65
TiO₂	0.54	0.41	0.30	0.48
ThO₂	2.14	2.10	2.27	2.20
UO2	5.93	6.21	5.85	6.40
Y₂O₃	17.94	18.27	21.03	18.29
La₂O₃	0.01	0.02
Ce₂O₃	0.15	0.22	0.07	0.24
Pr₂O₃	0.11	0.14	0.19	0.05
Nd₂O₃	1.81	1.87	1.51	1.35
Sm₂O₃	1.17	1.11	1.41	0.99
Gd₂O₃	3.28	3.49	3.80	3.10
Dy₂O₃	4.32	4.29	4.50	3.77
Er₂O₃	3.75	3.95	3.63	3.33
Yb₂O₃	3.55	3.69	3.48	3.57
FeO	1.79	1.26	0.87	1.71
CaO	0.96	0.98	0.99	0.99
Total	91.06	88.91	91.89	89.10
Nb	0.986	0.967	0.956	0.991
Ta	0.013	0.011	0.012	0.009
Ti	0.020	0.016	0.011	0.018
Th	0.024	0.025	0.026	0.025
U	0.065	0.071	0.065	0.072
Y	0.472	0.500	0.557	0.492
La	0.000	0.000	0.000	0.000
Ce	0.003	0.004	0.001	0.004
Pr	0.002	0.003	0.003	0.001
Nd	0.032	0.034	0.027	0.024
Sm	0.020	0.020	0.024	0.017
Gd	0.054	0.060	0.063	0.052
Dy	0.069	0.071	0.072	0.061
Er	0.058	0.064	0.057	0.053
Yb	0.054	0.058	0.053	0.055
Fe	0.074	0.054	0.036	0.072
Ca	0.051	0.054	0.053	0.054
sum	2.047	2.058	2.017	2.003
Nb + Ta	1.006	0.979	0.969	1.002
Cat–Nb–Ta	0.903	0.963	1.000	0.910