中文摘要：

秦岭洛南—栾川断裂带具有左旋斜向俯冲的运动学特征,其产状一般为107°/N∠65°。华南板块的俯冲方向为80°,俯冲角度为42°;华南板块运动方向为42°,运动方向与华北板块南部边界的夹角为65°,汇聚角25°。秦岭北缘强变形带内褶皱枢纽延伸方向为290°,与洛南—栾川断裂带存在15°的夹角。逆冲断层走向与褶皱的枢纽方向基本一致,大多数断层与洛南—栾川断裂带有相同的运动学极性,性质为左行平移逆断层。平移正断层走向主要为NE-SW,断层性质、展布方向、运动学特征与板块汇聚的应力作用方式吻合;片理、片麻理走向117°,与洛南—栾川断裂带走向夹角为10°。在垂直剪切带的剖面上,系统观察岩石变形特征,测量面理产状,进行岩石有限应变测量,岩石非共轴递进变形分析结果表明：秦岭北缘强变形带内由南向北面理走向与剪切带走向的夹角逐渐增大,岩石剪应变量依次递减,造山带变形具有“三斜对称”特点。

英文摘要：

The Qinling Luonan-Luanchuan fault belt shows the kinematic characteristics of a sinistral oblique subduction with strike generally at 107° and dip to north at 65°. The subduction of Southem China plate strikes at 80° and dips at 42°; the motion direction of Southern China plate is 42°; and the angle between the plate motion direction and the southern boundary of the North China plate is 65°, with the convergence angle of 25°. The fold hinge line trending 290° in strong deformation zone of the northern margin of the Qinling belt is 15° oblique to the strike of the Luonan-Luanchuan fault belt. The strike of reverse thrust shares basically the same direction with the fold hinge line. The majority of faults and the Luonan-Luanchuan belt have the same kinematic polarity; both are the left-lateral strike-slip reverse fault. The strikes of strike-slip normal faults are mainly NE-SW. The nature of faults, the direction of distribution and kinematic characteristics are in accordance with the mode of stress function of plate convergence; the schistosity and gneissosity are characterized by 117°-trending and an angle of 10° existing between them and the Luonan-Luanchuan fault belt. The systematic observation of rock deformation characteristics, strike-dip survey of foliation, finite strain measurement of rocks and non-coaxial progressive deformation analysis of rocks were completed in vertical section of the shear plane. The results show that there is a tendency that the included angle between the foliation and the strike of shear zone is increasing from south to north in the strong deformation zone of the northern margin of the Qinling belt. The shearing strains of rocks are descending in file and the deformation of the orogenic belt shows a feature of ＂triclinic symmetry＂.