Fig. 4

QUIN’s database statistical and quality characteristics. Key: FSP = Fault Striation Pair, T₄₅ and T₃₀ = extensional axes. PN = Pure Normal fault, NF = Normal Fault, NS = Normal Strike-slip fault, SN = Strike-slip Normal fault, SS = Strike-Slip fault, PSS = Pure Strike-Slip fault. (a) Cake diagram with percentage of FSP data first given in the present paper or derived from the literature (A-references containing one of the authors of this paper; B = exclusively other Authors); histograms representing quality rankings (A, B, C, where A is the best) for SS location and FSP data resolution. (b) Density contours of pole stereographic projections subdivided for Structural Sites (SS) lying on west- and east-dipping Host Faults (poles to planes). (c) Rake histogram with rake-based kinematic bins and corresponding pitches angles with relative frequency expressed in percent. (d) Trend rose diagram and plunge histogram (e) of the tensional deformation axis T₄₅, calculated assuming the fracture angle θ = 45°. (f) Trend rose diagram and plunge histogram (g) of the tensional deformation axis T₃₀, calculated assuming the fracture angle θ = 30°. (h) T-axis (T₃₀ and T₄₅) density contours from this database, compared with the (i) T-axis density contours of upper crust (depth < 15 km) focal mechanisms in the IPSI’s database² within the boundaries of the QUIN study area.