华北地台东缘的印支运动烙印——来自大连地区的构造形变信息  

Indosinian Orogeny in the Eastern Margin of North China Platform:Tectonic Deformation in Dalian Area

作　　者：邴志波[1] 王宗秀[2] 

机构地区：[1]中国地质调查局沈阳地质矿产研究所,辽宁沈阳110032 [2]中国地质科学院地质力学研究所,北京100037

出　　处：《地球学报》2004年第5期555-560,共6页Acta Geoscientica Sinica

基　　金：地质调查项目"大连市等六幅 1:5万区域地质调查"项目资助。

摘　　要：大连地区是稳定地台发生强烈变形的典型代表。研究表明 ,自中生代以来该区受多期较强烈构造变形事件的影响 ,强烈的改造、叠加造成该区复杂的地壳构造面貌 ,其中NS向剪切变形是区内规模最大、影响范围最广的构造变形 ,形成大规模EW走向巨型平卧、同斜倒转褶皱 ,造成大范围地层倒转。本文以变形构造动力学为纲 ,通过详细的地质调查及构造解析 ,对大连地区的NS向剪切变形进行了系统研究 ,确定其变形时间为晚印支期 ,认为晚印支运动是大连地区褶皱构造格架的奠基构造事件 ,这种大规模的板内变形是扬子板块和中朝板块陆 陆碰撞的陆内变形效应。As a typical area of intense deformation on thestable platform, Dalian area has been subjected to multi-phase intense deformation events since Mesozoic. Due to violent structural reformation and superimposed deformation, its crustal structure is very complicated. The NS-trending shear traction deformationis the largest and most influential structural deformation in the area, forminggigantic recumbent folds and overturned folds and resulting in large-scale stratigraphic overturning. In this paper, the authors have studied the NS-trendingshear traction deformation through detailed geological investigation and structural analysis, and determined the age of this deformation. It is considered that the post-Indosinian orogeny is the fundamental structural event of the fold-structure framework in Dalian area. The large-scale intraplate deformation is an intracontinental deformation effect of the continent-continent collision between Yangtze plate and Sino-korean plate.

关 键 词：构造变形 印支运动 地质调查 地壳 

分 类 号：P54[天文地球—构造地质学]