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Swiss Journal of Geosciences
Fig. 8 | Swiss Journal of Geosciences

Fig. 8

From: Blueschist mylonitic zones accommodating syn-subduction exhumation of deeply buried continental crust: the example of the Rocca Canavese Thrust Sheets Unit (Sesia–Lanzo Zone, Italian Western Alps)

Fig. 8

Compositional variations of Grt (a, b), Wm (c, d) and Px (e, f) in garnet-bearing gneisses (ZR4) with density of chemical compositions (grey areas) obtained from Q-XRMA mineral analysis. a, b Large Grt1a grains has mostly Alm composition (Alm 70–80%, Py 10–20%), Grt1b still has Alm composition (Alm 70–80%) but with lower Py content (< 10%). Ca content increases in Grt2a and Grt2b (1.0–1.5 a.p.f.u.). c, d Wm1 is muscovite and Wm2 and Wm3 have phengite composition. e, f Cpx1 has XJd content ≥ 80%

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