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医巫闾山地区的韧性剪切构造是中生代两期韧性变形作用的产物。早期韧性变形中a线理发育,线理走向和糜棱面理走向基本一致,线理在xy面上的侧伏角绝大多数<30°;该期韧性变形是以左行走滑运动为主。晚期韧性变形中a线理发育,线理倾伏向和糜棱岩中糜棱面理倾向相近,线理在xy面上侧伏角主要在45°～90°之间;该期韧性变形是伸展作用的产物。医巫闾山中生代两期韧性剪切变形作用表明,在侏罗纪至早白垩世期间辽西地区不仅发生了强烈挤压推覆作用和伸展作用,也发生了大规模左行走滑作用。该韧性变形作用的发现对进一步研究辽西中生代的构造演化序列、期次和构造格架转换等问题有重要意义。
The ductile shear structure in the Yiwulushan area is the product of the ductile deformation in the second generation of Mesozoic. In the early ductile deformation, a-line development is basically consistent with the trend of the line direction and the mylonide plane. Most of the lateral bending angles of the lineages are less than 30 ° in the xy plane. The ductile deformation in this period is dominated by the left-hand-slip. In the late ductile deformation, a-line development occurs. The tendency of line dip is similar to that of mylonitial mylonites, and the lineal bending angle of the line is mainly between 45 ° and 90 ° on the xy plane. The ductile deformation of this period is extended The product of action. The Mesozoic ductile shear deformation of the Mt.Wiwulushan shows that during the Jurassic to the Early Cretaceous period, not only strong extrusion nappe and extension but also large-scale left-lateral strike slip occurred in western Liaoning. The discovery of this ductile deformation plays an important role in further studying the Mesozoic tectonic evolution sequence, period and tectonic framework transformation in western Liaoning.