Fig. 7

Sketch showing the schematic structural section along the line X-X′ (see Fig. 1a for location) with depth vs. temperature data estimated from the deformed calcite samples collected within MBT and NT (Table 3S). Deformation along MBT and NT is due to slip at ~ 10 Ma and ~ 5 Ma respectively (Lavé and Avouac 2000). The red star represents the high-temperature deformation while the blue star represents deformation in low temperature. The MBT rocks deformed at depth were exhumed to shallow crustal depths. With evolution of the thrust toward the south, the shallow crustal rocks were deformed at shallower depths, leading to low temperature calcite deformation along the NT. The splay thrusts between MBT and NT show localized increase in deformation temperatures (indicated by the red stars). CM2, GM8 and GM4 are not plotted due to the scale of the sketch