Table 2 Al-in-hornblende geobarometry (rim analyses) for samples from the Bergell transition zone and the Como molasse
From: Continuity in geochemistry and time of the Tertiary Bergell intrusion (Central Alps)
Sample | Rock type | AlTOT (apfu) | Pressure (kbar) | Depth (km) | |
|---|---|---|---|---|---|
Bergell transition zone | VRU 13 | Granodiorite | 1.94 | 6.2 | 22.8 |
VRU 9 | Tonalite | 1.89 | 6.0 | 22.1 | |
VRU 28 | K-fsp rich tonalite | 1.90 | 6.0 | 22.1 | |
VRU 30 | K-fsp rich tonalite | 1.94 | 6.2 | 22.8 | |
Average tonalite transition zone | 1.91 ± 0.03 | 6.1 ± 0.7 | 22.3 ± 1.8 | ||
Como molasse | CMB-15 | Granodiorite | 1.48 | 4.0 | 14.7 |
CMB-4 | Tonalite | 1.37 | 3.5 | 12.9 | |
CMB-12 | Tonalite | 1.43 | 3.8 | 14.0 | |
CMB-9 | Tonalite | 1.40 | 3.7 | 13.6 | |
CMB-18 | Tonalite | 1.32 | 3.3 | 12.1 | |
CMB-6 | Tonalite | 1.39 | 3.6 | 13.2 | |
Average tonalite Como molasse | 1.38 ± 0.04 | 3.6 ± 0.8 | 13.2 ± 2.6 |