中文摘要：

北秦岭东部及华北板块南缘由多条断裂以及韧性剪切带分割成不同块体,这些块体中分布着不同时代不同类型的花岗岩。在前人关于该区花岗岩研究的基础上,详细归纳和分析了研究区古生代以来花岗岩体的时空分布、地球化学特征及其构造属性。研究表明这些花岗岩可分为3个时期：加里东期、印支期和燕山期。加里东期花岗岩为准铝质到弱过铝质的钙碱性系列,具大陆弧花岗岩特征;印支期花岗岩为高钾钙碱性系列,地球化学特征与后碰撞阶段花岗岩较为相似;燕山期花岗岩表现为从早到晚由高Sr低Y型埃达克质岩向A型花岗岩转变为特征。本区花岗岩的这种时空分布特征暗示了该区构造演化经历了加里东期俯冲造山、印支期碰撞造山以及燕山期陆内构造等演化阶段。

英文摘要：

The southern margin of the North China and the east part of the North Qinling is divided into different blocks by multiple fracture and ductile shear zone.Different types of granitoids of different ages are distributed in these blocks.On the basis of previous researches on granitoids in this area,this paper summarizes and analyzes the distribution,geochemistry and tectonic attribute of granitoids since Paleozoic in the study area.Studies have shown that these granitoids can be divided into three periods：the Caledonian,Indosinian and Yanshanian.Caledonian granitoids belong to aluminum-weakly peraluminous calc-alkaline series,showing the characteristics of continental arc granites.Indosinian granitoids belong to high-K calc-alkaline series,showing the geochemical features similar to those of post-collisional granitoids.Yanshanian granitoids present high Sr and low Y adakite-like granitoids in the early and emergence of A-type granite in the late.The spatial and temporal distribution characteristics of granitoids suggest that the tectonic evolution in this area has experienced Caledonian subduction orogeny,Indosinian collision and Yanshanian intracontinental tectonic stages.