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Table 12 Composition of amphibole from two samples of TGU Grt-Ph schist

From: The Theodul Glacier Unit, a slab of pre-Alpine rocks in the Alpine meta-ophiolite of Zermatt-Saas, Western Alps

 KB860OK-Z129OK-Z129
HornblendeHornblendeActinoliteActinoliteHornblendeHornblende
Point76774523
SiO248.3748.7655.0454.8649.2048.43
TiO20.070.040.030.060.070.12
Al2O311.2911.963.743.2911.0712.28
FeO13.3813.177.828.7513.7113.49
MnO0.170.120.130.140.140.35
MgO12.7312.2218.6918.2412.4011.78
CaO9.058.7112.3512.388.868.99
Na2O2.162.570.600.462.672.35
K2O0.230.150.070.060.190.34
Total97.4597.798.4598.2498.3298.12
Si6.9957.0107.6687.6947.0576.961
AlIV1.0050.9900.3320.3060.9431.039
AlVI0.9191.0370.2820.2370.9291.041
Ti0.0080.0040.0030.0060.0070.013
Fe1.6181.5830.9111.0261.6451.622
Mn0.0210.0150.0150.0170.0170.043
Mg2.7442.6193.8813.8132.6522.525
Ca1.4021.3421.8431.8601.3621.385
Na0.6060.7160.1610.1240.7440.655
K0.0420.0280.0120.0100.0350.062
XFe0.370.380.190.210.380.39
  1. Formula based on 23 oxygen