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

Swiss Journal of Geosciences

Table 10 Major element composition of Bristen granite (Brgr) (wt %)

Sample	KB 1348a	KB 1361	KB 1362	KB 1350	KB 1363	KB 1364	KB 1349	KB 1365	Average	Std.dev
Tunnel meter^a	8.438	8.544	8.610	8.745	8.745	8.770	8.868	8.868	Average	Std.dev
SiO₂	77.43	77.23	78.16	77.21	77.76	77.10	77.1	76.96	77.37	0.38
TiO₂	0.03	0.04	0.04	0.03	0.04	0.04	0.03	0.05	0.04	0.01
Al₂O₃	12.45	12.56	12.01	12.51	12.21	12.59	12.03	12.58	12.37	0.23
FeO^b	0.66	0.79	0.62	0.75	0.67	0.86	0.81	0.85	0.75	0.08
MnO	0.02	0.04	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.01
MgO	0.01	0.02	0.03	0.02	0.03	0.03	0.03	0.03	0.03	0.01
CaO	0.56	0.46	0.43	0.42	0.41	0.42	0.42	0.41	0.44	0.05
Na₂O	4.18	3.81	3.40	4.06	3.67	3.92	4.03	3.69	3.85	0.24
K₂O	4.22	4.15	4.41	4.58	4.37	4.27	4.34	4.62	4.37	0.15
P₂O₅	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.00
Total major	99.57	99.11	99.14	99.62	99.20	99.27	98.83	99.23	99.25	0.24
LOI	1.22	0.66	0.84	0.31	0.71	0.49	0.55	0.57	0.67	0.25
Total^c	100.79	99.77	99.98	99.93	99.91	99.76	99.38	99.80	99.91	0.37
Na₂O + K₂O	8.40	7.96	7.81	8.64	8.04	8.19	8.37	8.31	8.22	0.25