中文摘要：

秦岭石人山南缘出露一套元古代的片麻岩，在洛南—栾川断裂带的影响下经受了一系列变质变形作用。通过矿物共生组合、石英的动态重结晶型式、石英的分维数分析、石英的运动学涡度测量以及长石的有限应变测量等多种方法对石人山南缘岩石的变质变形进行了分析。结果显示由南向北随着远离断裂带，石人山南缘岩石的变质变形呈现规律性变化：表现为岩石中矿物粒径逐渐增大，形成温度逐渐增高，应变速率逐渐降低等特点。反映出随着远离洛南—栾川断裂带，变质相由绿片岩相逐渐过渡到低角闪岩相的特点，岩石退变质程度由强变弱；以剪切变形为主的岩石变形也逐渐减弱。这些现象说明了石人山岩块南缘的变质变形是受洛南—栾川断裂带的构造活动影响而形成的，反映了这一时期的宽坪岩块由南向华北板块下斜向汇聚俯冲、兼有左行走滑的构造活动对其北侧石人山岩块的影响巨大。因此，石人山岩块南缘的变质变形对研究板块俯冲过程中板缘变质变形有重要意义。

英文摘要：

Proterozoic gneiss occurs in the southern margin of Shirenshan, Qinling. Previous studies show that it undergoes a series of metamorphism and deformation, but there is few study on the detail process of the metamorphism and deformation. This project uses a variety of methods to study the metamorphism and deformation of rocks in southern margin of the Shirenshan.Methods： In this project, the mineral assemblages and reaction are carefully observed to determinate the metamorphic facies of rocks. Types of dynamic recrystallization of quartz and the fractal dimension analysis are used to estimate the deformation temperature of rocks. The kinematic vorticity analysis of quart and three-dimensional finite strain measurement of feldspar are carried out to determinate the shear type and the state of strain. Results： The mineral assemblages indicate the metamorphic facies changes from greenshist facies to low amphibolite facies as away from the Luonan—Luanchuan fault zone. The type of dynamic recrystallization of quartz is transition from bulging to subgrain rotation even to high temperature boundary migration. The quartz fractal dimension values also gradually decrease. The strain rate of rocks is also decreased, which is reduced from 2.1567E-16 to 9.0529E-16. Three dimensional finite strain measurement of feldspar indicates the strain ellipsoid show as single axis cigar type. The value of kinematic vorticity is about 0.7997~0.9322 suggests the shear type are dominated by a simple shear. Conclusions： Through the metamorphism and deformation analysis of rocks in southern margin of Shirenshan, it shows that the metamorphism and deformation change regularly from the south to the north as far away from the fault zone, manifest as the rock mineral particle size and the formation of the temperature gradually increases, and differential stress, strain rate decreases gradually. It reflects that as far away from the Luonan—Luanchuan fault zone, metamorphic facies gradually change from greenschist facies to low amphibolit