Fig. 3
FSP structural analysis performed using the combination of MATLAB scripts developed for this paper48. (a) Schematic representation of the fault geometry used to calculate the P45- B45- T45 and the P30- B30- T30 deformation axes; the block diagram is modified from Célérier15. Key: M, plane of movement54. P45 and P30 = contractional axes, B45 and B30 = neutral axes; T45 and T30 = extensional axes. (b) Example of stereographic representation of the geometrical relationships among fault plane, slip, directions, deformation axes, angle θ computed for each FSP of this database (modified from Sippel et al.16). (c) Strain ellipse configuration; for an ideal Andersonian condition, the principal strain axes (S1, S2 and S3, where S1 ≥ S2 ≥ S3) are coaxial to the principal stress axes (σ1, σ2 and σ3, where σ1 ≥ σ2 ≥ σ3). The long axis of the finite strain ellipse is the direction of maximum finite stretch (S1); the short axis is the direction of minimum finite stretch (S3); vice versa for the stress ellipsoid. (d) Examples of FSP data stereographic projection (equal-area net, lower hemisphere) using the graphical representation adapted in Andrenacci et al.48; each stereoplot refers to a specific SS identified in the QUIN database; Key: LU-E1, LU-W4, SSA1, MAR3, VET10, ER-E4, VEM11, PIPA9, MOPO4, NMT13 are the SS short names as in the QUIN database. Legend as in panel b.
