Schematic block diagrams integrate field and structural data with geochronology from plutons and shear zone elements to reconstruct how the George Sound shear zone (GSSZ) grew through the crust in space and time. Orange and red domains (in a and b, respectively) highlight regions of active deformation and strain localization in the Early Cretaceous, which is controlled by the emplacement and solidification of plutons (tan and pink colors) through time. Credit: Klepeis et al. [2022], Figure 13
September 30, 2022
New research reveals how the presence and absence of magmatism governs how shear zones initiate, grow, and reactivate to connect lower and upper crustal deformation.
Klepeis et al. [2022] synthesize new field observations, structural analyses, and geochronology with decades of their prior work from two lithospheric-scale, transpressional shear zones in New Zealand.