Table 1 Description of the numerical experiments, modes of deformation, and produced tectonic regimes (fault angle was measured at a depth of 0–10 km on those faults where strain localization occurred)
From: The role of gravitational body forces in the development of metamorphic core complexes
Experiment | Model no. | Elevation type | Simulation time | Fault angle (°) | Mode | Tectonic regime produced |
|---|---|---|---|---|---|---|
Mantle traction at the base, free slip on the sides, and partial melting | 1 | Crustal root support | 36 Myr | 8–18 | MCC (36–23 Ma) | BRP: first collapse phase |
2 | Dynamic support (no crustal root) | 36 Myr | 39–42 | Symmetric conjugate fault | BRP: second collapse phase | |
3 | Uniform thickness crust | 36 Myr | – | Rigid | CP: cratonic | |
Extension on the left (2.0 mm yr−1), basal pressure equilibrium, and partial melting | 4 | Crustal root support | 30 Myr | 11–20 | MCC (30–5 Ma) | BRP: first collapse phase |
5 | Dynamic support (no crustal root) | 30 Myr | 30–46 | Dome-like structure | NC: extensional detachment faulting | |
6 | Uniform thickness crust | 30 Myr | 43–44 | Pure shear | BRP: second collapse phase |
