Skip to main content

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

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

Sample KB 1348a KB 1361 KB 1362 KB 1350 KB 1363 KB 1364 KB 1349 KB 1365 Average Std.dev
Tunnel metera 8.438 8.544 8.610 8.745 8.745 8.770 8.868 8.868
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
FeOb 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
Totalc 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
  1. LOI Loss on ignition
  2. aDistance from north portal in kilometer
  3. bTotal iron is given as FeO
  4. cTotal does not include a maximum of 0.15% F