陆内造山是一个非常复杂的地质过程。南秦岭造山带安康石泉—汉阴—旬阳一带研究区处于南秦岭陆内复合造山带与扬子板块北部衔接部位,早古生代志留系变形变质岩片发育,以逆冲推覆构造和多层次韧性滑脱逆冲推覆岩片为主。印支期以来广泛发育多期新生面理,可分出3期,面理置换清晰,盖层区以S2面理置换S1最为显著。从该区多期构造变形、晚期盖层花岗岩脉侵入、基底岩浆底劈-伸展热穹隆上升、与晚期花岗岩脉相伴的热变质及次生加大黑云母变斑晶和石榴子石斑晶高温矿物对、多类型热液蚀变的发育、不同期次面理产出的石英脉流体包裹体温压特征差异、石泉一带韧性剪切变形面理中黑云母Ar-Ar测年161~169 Ma、凤凰山穹隆北缘韧性剪切变形面理中云母Ar-Ar测年178~163 Ma等分析,表明该区至少经历过印支期和燕山期两期构造变形,尤其是S2期面理大致对应燕山期,为明显的陆内造山期构造变形,固态塑性流变和脆-韧性剪切变形特点显著。野外构造-岩相填图确定S2期面理最发育,优势走向为北西向,大部分新生矿物岩石沿S2面理分布,表明燕山期与陆内造山作用密切相关。构造变形强烈部位可形成脆-韧性剪切带。晚印支期—燕山期为褶皱-S2+3面理-逆冲推覆断裂组合样式,新生代为不同程度走滑-隆升差异的断块构造组合。陆内造山演化期分为三个亚阶段:(1)晚印支—早燕山期(T3-J1+2)陆内造山垮塌阶段;(2)中晚燕山期(J3-K2)陆内造山挤压推覆阶段;(3)喜马拉雅期断块隆升改造阶段(K2-Mz)。受陆内构造汇聚和走滑作用促使该区上地壳构造热动力聚集,形成凤凰山—牛山岩浆-热穹隆,造成地壳局部重熔,形成花岗岩脉侵位。燕山期调研区南部安康断裂带和北部宁陕断裂带在J1-2分别发生的右行走滑和左行走滑剪切变形造成该区较显著地向东挤出滑脱变形,显示陆内造山晚期走滑分量较重要。 Inland orogeny is a very complicated geological process. South Qinling orogenic belt Ankang Shiquan - Hanyin - Xunyang area is located in the southern Qinling intracontinental orogenic belt and the northern junction of the Yangtze plate, the Early Paleozoic Silurian metamorphic metamorphic rocks developed to thrust nappe structure and multi-level toughness Slippage and thrusting are the main thrusts. Since the Indo-Chinese epoch, a number of newborn physiognathies have been widely developed, which can be divided into three phases. The surface replacement is clear. From the multi-stage tectonic deformation in the area, the intrusions of late caprock granite veins, the increase of the bottom of the magma at the bottom of the magma, the thermal metamorphism accompanied by the late granite veins and the secondary increase of the biotite porphyritin and garnet porphyrite high temperature Mineral assemblages, multi-type hydrothermal alteration, and temperature-pressure characteristics of quartz vein fluid inclusions produced by different periods of lithology. The Ar-Ar dating of biotite in the ductile shear deformational surface of Shiquan area is 161-169 Ma, The analysis of Ar-Ar dating from ductile shear deformation in the northern margin of the Fenghuangshan dome shows that the area experienced at least two structural deformations during the Indosinian and Yanshanian periods, especially the S2 period Yanshanian period, for obvious intracontinental orogeny tectonic deformation, solid state plastic rheology and brittle - ductile shear deformation characteristics are obvious. The field structure-lithofacies mapping confirmed that the S2 facies were the most developed and the NW trending northwestward, and most of the new-born mineral rocks distributed along S2, indicating that the Yanshanian period is closely related to the intracontinental orogeny. Structural deformation strong sites can form brittle - ductile shear zone. Late Indosinian-Yanshanian fold-S2 +3 physiognomy-thrust nappe fault combination pattern, Cenozoic for different degrees of strike-slip difference uplift fault assemblage combination. The intracontinental orogeny evolution period is divided into three sub-stages: (1) the late Indosinian-Early Yanshanian period (T3-J1 + 2) during the intracontinental orogeny collapse; (2) the mid-late Yanshanian (J3-K2) intracontinental orogeny Squeeze pushover stage; (3) Himalayan fault uplift stage (K2-Mz). Due to the intracontinental tectonic convergence and the strike-slip effect, the crustal structure of the upper crust is thermally aggregated to form the Fenghuangshan-Niushan magma-thermal dome, resulting in local remelting of the crust and the emplacement of granite veins. The right and left strike-slip shear deformations of the Ankang fault zone in the southern Yanshanian research area and the Ningsang fault zone in the north of the Yanshanian research area resulted in a more pronounced eastward extrusion and slippage deformation in J1-2, Sliding component is more important.