Skip to main content

Table 1 Schematic relationships between deformation and metamorphism in the lithologies studied (Roisan Zone and Arolla Series, Lower Unit)

From: Geometry and kinematics of the Roisan-Cignana Shear Zone, and the orogenic evolution of the Dent Blanche Tectonic System (Western Alps)

Stage Age Structure Unit Metamorphic conditions
D1 + M1 + MAGI Pre-Alpine Migmatitic structures and foliation VALPELLINE SERIES Granulite-Amphibolite
Inequigranular aggregates CUNEY and BECCA DI SALE’ SLICES Amphibolite
Igneous intrusion AROLLA SERIES (coronitic domain)
D2 + M2 Pre-Alpine Coronas AROLLA SERIES (coronitic domain) Greenschist
D3 + M3 Alpine S3 AROLLA SERIES (mylonitic and tectonitic domains) Blueschist
CUNEY and BECCA DI SALE’ SLICES Blueschist
ROISAN ZONE Blueschist?-Greenschist
D4 + M4 Alpine S4; F4, PA4 AROLLA SERIES (mylonitic and tectonitic domains) Blueschist
CUNEY and BECCA DI SALE’ SLICES Blueschist
ROISAN ZONE Blueschist?-Greenschist
D5 ± M5 Alpine F5; PA5,S5 AROLLA SERIES (mylonitic and tectonitic domains) Greenschist
ROISAN ZONE
D6 ± M6 Alpine Fractures and veins All lithologies Greenschist
  1. S foliation, F fold, PA axial plane, A fold axis