“内蒙地轴”南缘断裂带的活动时代及结构分析  

Ages of activities of the southern"Inner Mongolian axis"marginal fault belt and an analysis of its structure

作　　者：胡玲[1] 宋鸿林[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《中国地质》2002年第4期369-373,共5页Geology in China

基　　金：国家自然科学基金项目(49772148);原地质矿产部地质力学开放实验室项目(dlkf-9802)

摘　　要：通过多次野外地质调查及大量区域地质资料的分析,提出“内蒙地轴”南缘断裂带的西延部分是临河-集宁断裂。该断裂带在航磁、重力资料中均有显著异常,莫霍面等深资料显示是一条影响达地幔的深断裂带。同时,该断裂带还是一条长寿断裂带,分别在中元古代、古生代、中生代及新生代均有不同形式的构造活动,笔者系统总结了该断裂带在不同活动时代的构造活动特点,并首次分析了该断裂带在长期活动中形成的多种断裂结构类型。On the basis of several field geological surveys and voluminous regional geological data,the au-thors propose that the westward extension of the southern'Inner Mongolian axis'marginal fault belt is the Linhe-Jining fa ult.Aeromagnetic and gravity data show that this fault belt has pronounced anom alies and the Moho depth contour data show that it is a deep fault belt whose i nfluence reaches the mantle.Addi-tionally,this fault belt is also a long-liv ed one,which was active in different forms in the Mesoprotero-zoic,Paleozoi c,Mesozoic and Cenozoic respectively.This systematically summarizes the charac teristics of the activities of the fault belt in different ages and first ana lyzes multiple types of fault structure formed in its long-continued activitie s.

关 键 词：活动时代 “内蒙地轴”南缘断裂带 断裂结构 地质资料 构造活动 

分 类 号：P542[天文地球—构造地质学]