Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6445105 | Journal of Structural Geology | 2013 | 16 Pages |
Abstract
Empirically calibrated paleopiezometers based on quartz recrystallized grain size and deformation lamellae spacing show very similar results, indicate that the shear zone developed under stress ranging from 40Â MPa to 60Â MPa. Using a quartzite dislocation creep flow law we further estimate that the detachment shear zone quartzite mylonite developed at a strain rates between 10â12 and 10â14Â sâ1. We suggest that a compressed geothermal gradient across this detachment, which was produced by a combination of ductile shearing, heat advection, and cooling by meteoric fluids, may have triggered mechanical instabilities and strongly influenced the rheology of the detachment shear zone.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geology
Authors
Raphaël Gottardi, Christian Teyssier,