[SSS17-P22] Structural, mineralogical, and geochemical characteristics of an ancient megasplay fault in the Hidakagawa Formation, Kii Peninsula
Keywords:accretionary prism, trace-element, fluid-rock interaction, megasplay fault, Shimanto belt
The burial depth in this region was estimated 3-4 km, also indicating large cumulative displacement along the fault. Granuation of mineral grains and shear foliation were well developed in the slip zone, and high temperature (>350 °C) by fluid-rock interaction was estimated along the slip zone. These features were well coincided to those in the megasplay fault. Furthermore, we discuss the slip behavior and the slip parameters.