Abstract:Metaperidotite occurring at the bottom of the Yaluzanbujiang ophiolite suite has extensively experienced strong deformation. According to main characteristics of plastic deformation in the studied massifs and X-ray fabric analysis, the fabrics of olivine can be classified into three main types: [100], [010] and [001], which all assume the maximum pattern and are respectively parallel to lineation, The development of fabrics closely related to deformation conditions (such as flow stress, temperature and strain rate), deformation mechanism and deformation evolution results from dislocation movement.The fabric transformation of olivine in metaperidotite shows obvious regularity. In general, there is a progressive transition from high temperature [100] fabric to low temperature [010] and [001] fabrics in the process of deformation. The high temperature plastic flow fabrics affect and restrict the development of low temperature ones, and the overprinted deformation is favorable for the formation of [100] preferred orientation and the transformation from [100] fabric to [001] and [010] fabrics.