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剑鞘褶皱(sheath fold)由Carreras研究比利牛斯海西期褶皱带中提出之后,一直作为深层次韧性剪切带鉴别标志(之一)而被世界所公认.最近国际上也只是在深层次变质岩中见到有关这类的构造现象.我国东南在浅层脆性构造域的二叠系煤系地层中,见到由重力作用的滑覆剪切形成的非常典型的剑鞘褶皱.
Since the sheath fold was proposed by Carreras in the Hercynian fold belt of the Pyrenees, it has been recognized by the world as one of the distinguishing marks of the deep ductile shear zone. Recently, This type of tectonic phenomena can be seen in the metamorphic rocks of the stratigraphy.The very typical scabbard fold formed by the gravitational shearing shear in the Permian coal measures of the shallow brittle tectonics in southeast China.