作　　者： ; ;

机构地区： 中国科学院广州地球化学研究所

出　　处： 《天然气地球科学》 2005年第3期278-282,共5页

摘　　要： 川东南"隔档式构造"中的众多背斜,平面上呈左行斜列式展开,剖面上显示为中生界与下古生界双层花状构造叠合体。在分析区域地质背景、褶皱结构特征的基础上,结合生产勘探实际资料提出:这种构造格局应是在区域应力场由张性转变为压扭性的背景下,受周边构造环境、基底性质和深部断裂控制逐步形成的,经历了褶前张裂、初步褶皱、晚期定型3个主要演化阶段,是在纵弯褶皱作用、横弯褶皱作用及剪切褶皱作用3种变形方式共同作用下形成的中生界与下古生界"双层花状构造"的叠合体。 Anticlines from ejective structure in southeast Sichuan distribute sinstral in horizontal plane and the vertical section showed as overlapping-structures beared in upper Mesozoic and lower Paleozoic.Based on the analysis of regional geology background, structural feature and exploration data, a viewpoint is advanced in this paper that the structural framework in southeast Sichuan was formed successively under the background of transition of regional stress field from tension to compresso-shear.The structural environment,the characteristic of basement and the deep-fault are control factors in their forming process. The evolutionary history could be divided into three stages as pre-folding tension,primary folding and final forming. Most of the anticlines we see today could be regarded as superimposed bodies of two-level flower-structure,and the folding mechanism contained three factors of bend folding,buck folding and shear folding.

关 键 词： 隔档式构造 褶皱作用 花状构造 构造叠合体 压扭

领　　域： [石油与天然气工程]