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通过对罗布莎等藏南阿尔卑斯型橄榄岩体结构、组构、变形类型和变形机制的探讨,将岩体的变形序列归纳为:粘性流变→准粘性流变→高温塑性流变→低温塑性流变→准脆性变形→脆性变形。岩体变形所揭示的岩石圈变形的垂向分带为:脆性-准脆性变形(0—15km),低温塑性流变(15—60km),高温塑性流变(60—100km),准粘性-粘性流变(>100km)。低温塑性流变是地壳中的主要变形类型,其主要流动方向为由北往南,是造成西藏地区推覆构造的主要驱动力。
Through the discussion of the structure, fabric, deformation types and deformation mechanism of the Robesha and other Southern Alps peridotites, the deformation sequences of the rock mass are summarized as follows: viscous flow → quasi-viscous flow → high-temperature plastic flow → low-temperature plasticity Rheology → quasi-brittle deformation → brittle deformation. The vertical zoning of lithosphere deformation revealed by deformation of rock mass is: brittle-quasi-brittle deformation (0-15km), low temperature plastic rheological (15-60km), high temperature plastic rheological (60-100km), quasi-viscous- Viscous rheology (> 100km). Low-temperature plastic rheology is the main deformation type in the crust. Its main flow direction is from north to south, which is the main driving force for the nappe structure in Tibet.