Abstract Radiogenic strontium isotopes ( 87 Sr/ 86 Sr) of vein carbonates play a central role in the tectonometamorphic study fold-and-thrust belts and accretionary wedges have been used to document fluid sources fluxes, for example, along major fault zones. In addition, Sr ratios can trace diagenetic metamorphic evolution pore fluids accreted sediments. Here we present from Infrahelvetic flysc...