Extreme ductility of feldspar aggregates - Melt enhanced grain boundary sliding and creep failure: Rheological implications for felsic lower crust

Abstract

Contrasting rheological behavior of feldspars with respect to quartz prior to fracturing is attributed to different deformation mechanisms. Feldspars appear weaker due to grain boundary sliding accommodated by coupled melt-enhanced diffusion creep along

Keywords

• rheology
• microstructure
• cavitancy
• quartz
• feldspar