Supplementary Materil

Here, we report structural analysis and RSCM temperatures of each locality as well as pressure-temperature estimations to support the main text; the reader is referred to the Methods section for a detailed description of the analytical protocols. Contents of this file Table S1 - The dataset of sample locations, observed micro- and mesostructures and stress regime. Table S2 - RSCM temperatures across the Kodiak accretionary complex with previously published results. VR - Vitrinite reflectance; IC - Illite crystallinity; FI - Fluid inclusion studies; MP – Mineral paragenesis. Text S3 – chemical composition of illite and chlorite determined by electron microprobe (EPMA) and pressure-temperature estimation using the multi-phase equilibrium model (Dubacq et al., 2010; Vidal et al., 2006).