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本文论述的辉长质糜棱岩发现于甘肃北山红柳河蛇绿岩套中。在简单说明了糜棱岩的地质背景及特征、描述了变形岩石的显微构造特征之后，重点对糜棱岩形成过在中的应变软化机制作了论述。探讨了软化岩的存在、组构调整、粒度缩小，长石的动态重结晶，水以及主导变形机制的不断调整与转化等应变软化机制，在应力作用下使岩石逐步软化过程中所起的作用，得出这种糜棱岩是在拆离剪切作用下，应力在蛇绿岩中的软化岩石辉长岩中集中，从而形成红柳河辉长质糜棱岩的结论。
The gabbro mylonite discussed in this article was found in the Hongliuhe ophiolite suite in Beishan, Gansu Province. After briefly explaining the geological background and characteristics of mylonites and describing the microstructural features of the deformed rocks, the mechanism of strain softening during the formation of mylonites is emphatically discussed. The mechanism of strain softening, such as the existence of soft rock, structure adjustment, grain size reduction, dynamic recrystallization of feldspar, continuous adjustment and transformation of water and dominant deformation mechanism, is discussed in the process of gradual softening of rock under stress It is concluded that this mylonite is concentrated in the softened rock gabbro in the ophiolite under the effect of detachment and shearing, so that the formation of the Hongliu gabbro mylonite is concluded.