Experimental study of Frictional property of siliceous shale from the viewpoint of clay mineral fabric

Abstract:

There exist slate cleavages in siliceous shale distributed in Tamba-belt located southwest Japan, belonging to Jurassic accretionary complexes, which is formed by a unique geological process. Tamba belt is classified into the complexes of the Type I and II Suites. It is well known that the siliceous shale mined from Type I Suite of Tamba belt is of high-quality as natural whetstone. In this study, we analyzed the relationship between the accretionary prism geology and topography of the study area in order to characterize the distribution of the siliceous shale. We measured illite crystallinity (IC) in order to consider the deformation process, metamorphic conditions, and clay mineral fabric. The value of IC and clay mineral fabric are deemed to be related to frictional properties.