Mechanisms of Aqueous Fluid Infiltration and Redistribution in a Lower‐Crustal Pseudotachylyte‐Bearing Fault

• Published in: Geochemistry, geophysics, geosystems : G3 Vol. 26; no. 2
• Main Authors: Michalchuk, Stephen Paul, Lueder, Mona, Gies, Nils B., Ohl, Markus, Hermann, Jörg, Plümper, Oliver, Menegon, Luca
• Format: Journal Article
• Language: English
• Published: Washington John Wiley & Sons, Inc 01.02.2025; The Geochemical Society; Wiley
• Subjects: brittle deformation; Chemical reactions; Deformation; Earthquakes; Feldspars; Fluids; fluid‐rock interaction; Fourier transform infrared spectroscopy (FTIR); Fourier transforms; Grain boundaries; Grain growth; Infiltration; lower crust; Metamorphism; Microscopy; Plagioclase; Porosity; pseudotachylyte; Rock; Rocks; Seismic activity; Shear; Solifluction

Coseismic fracturing in the strong, dry, and metastable plagioclase‐rich lower‐crust is an effective mechanism for creating pathways for fluids to infiltrate the host rock, kick‐start metamorphism, and potentially lead to rheological weakening. In this study, we have characterized the damage zone fl...