摘要
In three shallow-level fault systems in eastern China, nano-sized (30―100 nm) grinding grain textures are found in the thin-shelled rheological layer representing frictional-viscous high strain field. The surface layer near slipping plane is composed of stacks of grinding grains with high sphericity and uniform nano-sized diameter, while the underlying layer appears as a mixture of irregular ones with diverse diameters. Rock deformation experiments indicate that the grinding grain texture is a common phenomenon in shearing fractures, suggesting a potential transition from sliding friction to rolling one during the rock deformation process. This transition is crucial for many tribological processes in geo- logical fields.
In three shallow-level fault systems in eastern China, nano-sized （30-100 nm） grinding grain textures are found in the thin-shelled theological layer representing frictional-viscous high strain field. The surface layer near slipping plane is composed of stacks of grinding grains with high sphericity and uniform nano-sized diameter, while the underlying layer appears as a mixture of irregular ones with diverse diameters. Rock deformation experiments indicate that the grinding grain texture is a common phenomenon in shearing fractures, suggesting a potential transition from sliding friction to rolling one during the rock deformation process. This transition is crucial for many tribological processes in geological fields.
基金
the National Natural Science Foundation of China (Grant Nos. 40634022, 40673041, 40572118 and 40372092)
the State Key Laboratory of Geology and Exploitation of Petroleum Reservoir (PLN 0606)
关键词
研磨颗粒结构
剪切薄板
摩擦粘性压力领域
岩石
grinding grain texture, shearing-slipping thin-shell, frictional-viscous high strain field
