燕辽地区中生代构造格局的再讨论  

Discussion about the Geological Characters of the Yan-Liao Regional Structural Framework

作　　者：林晓辉[1] 李建国[1] 秦正永[1] 

机构地区：[1]天津地质矿产研究所,天津300170

出　　处：《地质调查与研究》2009年第2期81-91,共11页Geological Survey and Research

基　　金：国家国土资源大调查项目(1212010611802)

摘　　要：本文中,笔者对燕辽地区的构造形迹进行了重新厘定,并将其划分成不同构造阶段的产物,提出了一些新的认识:燕辽地区范围包括"内蒙地轴"和燕山沉降带,其构造格局主要由燕辽向斜、燕辽复向斜和秦皇岛背形及其配套断裂组成,在这三个区域构造样式之下又发育次一级的褶皱构造及其配套断裂,并且后期构造对前期构造改造、叠加和利用,致使出现复杂的构造格局。海西-印支期形成了燕辽向斜及其配套断裂,"内蒙地轴"是燕辽向斜的北翼,燕辽沉降带是燕辽向斜的南翼。早中侏罗世进一步褶皱成复向斜,"内蒙地轴"南缘断裂是复向斜的轴部纵断裂并充填了上侏罗统作为裂隙充填物。中晚侏罗世开始,以秦皇岛-凌源断裂为轴面褶皱成一个背形。秦皇岛-凌源断裂的存在及其对燕山段和辽西段的影响致使燕山段和辽西段具有不同的地表出露形态。The structural form in the Yan-Liao area consists of Yanliao clinorium, Yanliao synclinorium and Qinhuangdao antiform with their sub-grade folds and faults in Yanshan-western Liaoning Province. They formed a very complicated structural system. Yanliao clinorium forms during Indosinian movement, and Yanliao synclinorium during J1-J2 period and the Qinhuangdao antiform during J3-Kperiod. The inner Mongolian axial is the northern limb of the Yanliao clinorium. The southern faults of the inner Mongolian axial is the axial longitudinal faults of Yanliao synclinorium. The sediment in the J3 period is the fracture filling synclinorium that resulted in the different patterns of the folds and faults Qinhuangdao fault may cut off the Yanliao in Yanshan and the western Liaoning.

关 键 词：构造格局 构造形迹 褶皱 断裂 中生代 燕山 辽西 

分 类 号：P548[天文地球—构造地质学]