Subduction zone could generate strong stresses especially within subducting slab and also it makes special high pressure and low temperature environments. Ergo study on blueschist is important to understand active stresses in subduction zone and in addition to reveal geofluid circulations owing to abundant hydrous phases in it. Fabric analyses of naturally and experimentally deformed blueschists were investigated to delineate its implications for seismic anisotropy and source of seismicity in subducting oceanic crust.……