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阿尔金断裂带中段出露一套走滑过程中形成的花岗质和角闪质糜棱岩。从糜棱岩中分选出3种类型的锆石:岩浆成因的长柱状锆石、柱状锆石和变质成因的次浑圆状锆石。这3种锆石的显微结构和构造特征以及它们内部的矿物包裹体均有所区别。其中长柱状锆石在岩石中定向排列,晶体长轴方向与拉伸线理方向一致,并且内部的所有矿物包裹体的长轴方向均与锆石的长轴方向平行,即与拉伸线理方向平行;拉曼研究表明包裹体矿物具熔融相特征;阴极发光图像中反映出这种锆石具有相对均一的内部结构。因此,该长柱状锆石是在韧性剪切过程中部分熔融环境下快速定向生长的,不仅代表了走滑剪切过程中的剪切应变方向,而且其生长年龄代表了走滑剪切的时代。
The middle part of the Altyn Tagh fault exposes a series of granitic and horny mylonites formed during the strike-slip process. Three types of zircons were selected from the mylonites: magmatic zircons, columnar zircons and metamorphic zircons. The three kinds of zircon microstructure and structural characteristics and their internal mineral inclusions are different. The long columnar zircons are oriented in the rock. The direction of the long axis of the crystal is consistent with the direction of the tensile line. The long axis directions of all the mineral inclusions in the interior are parallel to the long axis of the zircon, The Raman studies show that the inclusions have the melting phase. The cathodoluminescence image shows that the zircon has a relatively uniform internal structure. Therefore, the long columnar zircon rapidly grows in a partial melting environment during the ductile shear process, which not only represents the direction of shear strain in the strike-slip shear process but also represents the age of strike-slip shear .