Fig. 10

Zircon in samples from Monte Mucrone. Micaschist AV17-07: a–f Selected CC images of analysed zircon grains. Scale bar in all images is 30 μm. Measured spots are shown (yellow circles) with the associated date (± 1σ Ma). The two grains yielding Alpine ages are marked by a red frame. g REE patterns of zircon domains of Permian age (rim1, grey lines) and of Alpine Alpine age (rim2, red lines). h Concordia plot for zircon rim1 and weighted average ²⁰⁶Pb/²³⁸U age. The green circle represents the calculated Concordia age. i Concordia plot for zircon rim2 and weighted average ²⁰⁶Pb/²³⁸U age. The green circle represents the calculated Concordia age. Eclogite AV17-16: j–m CC images of the recovered and analysed zircon grains. Scale bar in all images is 30 μm. Measured spots are shown (yellow circles) with the associated date (± 1σ Ma). n REE patterns of zircon cores. o Concordia plot for zircon core and weighted average ²⁰⁶Pb/²³⁸U age. The green circle represents the calculated Concordia age