A comparative study of natural and experimental nano-sized grinding grain textures in rocks  

作　　者：SUN Yan SHU LiangShu LU XianCai LIU Hao ZHANG XiHui K. KOSAKA LIN AiMing 

机构地区：[1]Department of Earth Sciences, State Key Laboratory for Research of Mineral Deposits, Nanjing University, Nanjing 210093, China [2]Department of Management Information Systems, University of Memphis, Tennessee 38152, USA [3]Department of Geosystem Sciences, Nihon University, Tokyo 156-8550, Japan [4]Department of Geosciences, Shizuoka University, Shizuoka 422-8529, Japan

出　　处：《Chinese Science Bulletin》2008年第8期1217-1221,共5页

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)

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.

关 键 词：研磨颗粒结构 剪切薄板 摩擦粘性压力领域 岩石 

分 类 号：P58[天文地球—岩石学]