新疆二台断裂带是在早期的韧性剪切带（糜棱岩带）的基础上发展起来的．糜棱岩形成于地壳中１０～１２ｋｍ的岩石韧－脆性转换带．此后发生了岩石变形过程为韧性变形—韧性失稳—脆性断裂的地震活动，形成了二台断裂带，并伴有假玄武玻璃的产生．假玄武玻璃的分布范围长约６０ｋｍ、宽约３００ｍ，代表了古震源体的规模，其环境条件与糜棱岩的形成环境相同 The Ertai fault zone in Xinjiang was developed on the basis of the early ductile shear zone (mylonite zone). Mylonite formed in the crust of 10 ~ 12km rock tough-brittle transition zone. Since then, the rock deformation process has taken place as the ductile deformation-ductile instability-brittle fracture, resulting in the formation of the Ertai fault zone accompanied by fake basaltic glass. Fake basaltic glass distribution range of about 60km, width 300m, representing the size of the ancient source body, the environmental conditions and the formation of mylonites the same