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Swiss Journal of Geosciences
Fig. 9 | Swiss Journal of Geosciences

Fig. 9

From: Eclogitic metamorphism in the Alpine far-west: petrological constraints on the Banchetta-Rognosa tectonic unit (Val Troncea, Western Alps)

Fig. 9

a Compilation of P–T trajectories of different units of the Western Alps for comparison with the studied area. Whereas the D1 P–T estimates for the Banchetta-Rognosa unit were obtained by isochemical phase diagram modelling, the retrograde tectono-metamorphic events (i.e. D2 and D3) have been qualitatively inferred on the basis of mineral assemblages only. Different line patterns indicate different thermobarometric methods as reported in the legend. Reactions 1 to 8 are from: 1–2: Poli & Schmidt, 1995; 3: Holland, 1980; 4: Guiraud et al., 1990; 5: Evans, 1990; 6: Powell & Holland, 1990; 7: Rao & Johannes, 1979; 8: Nitsch, 1971; b Simplified tectonic map of the Western Alps (redrawn from the Structural Model of Italy, Bigi et al., 1990) and approximate location of units considered for comparison

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