2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 15 - Sep 19, 2021Online
[R8-06]Frictional melting process during formation of pseudotachylyte, Sarwar-Junia fault zone, India
*Junya Okazaki1, Jun-ichi Ando1, Kaushik Das1(1. Hiroshima Uni. Sci.)
Keywords:
Pseudotachylyte,Fault activity,Frictional melting,Ductile deformation zone
Pseudotachylyte is generated by frictional melting resulting from seismic rapid slip. In this study, two typses of pseudotachylyte veins are observed. From the microstructural observations, it is suggested that these veins are formed in ductile deformation zone and brittle deformation zone, respectively. In addition, it is considered that the fault activity in ductile deformation zone was contributed by the preferred orientation of biotite grains, and (001) of biotite works as weak plane of fault activity in ductile deformation zone.