南秦岭逆冲推覆体系的形成及其与北秦岭逆冲推覆体系的关系──以南襄盆地87-600反射地震剖面为例  

Formation of South Qinling Thrust System and Its Relationships with North Qinling Thrust System

作　　者：刘宁 刘绍龙[2] 薛玉伟[2] 刘英[2] 

机构地区：[1]中国石油科学技术研究院,北京学院路20号910信箱100083 [2]河南石油勘探局

出　　处：《河南石油》1999年第2期1-5,共5页Henan Petroleum

基　　金：国家自然科学基金!秦岭与东秦岭二课题子课题 49290100;49172139

摘　　要：在秦岭海盆于印支期关闭、褶皱推覆隆起后的燕山期陆内俯冲、地壳急剧缩短过程中，在先期近东西向大型断裂参与下，由于秦岭、华北陆壳上地壳的强烈挤压，南秦岭各断块以中地壳低速层为主滑脱推覆面向扬子陆壳逆冲、仰冲，北秦岭各断块则沿低速层向秦岭陆壳大规模滑脱推覆，从而在东秦岭地区构成了两个向南逆冲的巨型逆冲推覆构造体系。二者均属前展式推覆类型。文章对其构造特点、形成条件及相互关系进行了详细论述．As Qinling sea basin closed in Indo-chinese epoch and then subducted to inner continent in Yanshan epoch after folding, thrusting and doming-up and the earth crust sharply shortened, strong compression between Qinling and Huabei continental crusts, along with the existence of the nearly west-east oringinal large fault,caused all the South Qinling fault blocks thrusting and obducting toward Yangtze continental crust, and all the North Qinling fault blocks thrusting toward Qinling continental crust along the low velocity zone in the middle earth crust. As a result, two large south - verging thrust systems of piggyback propagation type developed in East Qinling. This paper details their structural features,forming conditions and relationships.

关 键 词：南秦岭 北秦岭 逆冲推覆体系 地震勘探 地震剖面 

分 类 号：P631.443[天文地球—地质矿产勘探]