Open Access
Table 4
Summary of tectonic and metamorphic events recorded in the Belledonne-Pelvoux area.
| Event | Belledonne SW | Cortical Pelvoux | Inner Pelvoux | |
|---|---|---|---|---|
| D3 | Structure | Low angle S3 +/ mylonitc Horizontal axis F3 fold and a-Type F3 fold Top to NE shearing | Low angle S3 +/ mylonitic Horizontal axis F3 fold | |
| P-T | Retrograde amphibolite facies 0.45–0.35 GPa–450–50 °C | High-T migmatite Cordierite bearing migmatite | ||
| Age | ca. 306–298 Ma | ca. 306–298 Ma? | ||
| D2 | Structure | High angle S2 N030E Upright fold NE-SW axis NE-SW L2 | High angle S2 N030E High angle C2 N-S High angle C'2 N150E Folded S2, Horizontal axis | High angle S2 N030E Upright fold NE-SW axis High angle C2 N-S High angle C'2 N150E NS to NE-SW L2 |
| P-T | Sill + melt | Low-T migmatite | Low-T migmatite | |
| Age | ca. 330–310 Ma Freville et al., 2018 | ca. 330–298 Ma | ca. 330–298 Ma | |
| D1 | Structure | Low angle S1 Recumbent fold to the east E-W L1 | Mark the lithological limits low angle S1–3 | Mostly erased Relictual S1 in F2 fold hinge |
| P-T | Amphibolite facies Grt-Bt + melt 0.6–0.8 GPa–600–630 °C | Amphibolite facies? + melt | No evidence | |
| Age | 339 ± 5 Ma | ca. 350–330 Ma | ca. 340–330 Ma? (HP stage, Jacob et al., in review) |
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