吉南样子哨坳陷北缘重力滑脱构造  

The gravitational décollement structure on the north marginof the Yangzishao depression, southern part of Jilin Province

作　　者：贾海明[1] 卢兴波[1] 齐成栋[1] 赵成弼[1] 

机构地区：[1]吉林省区域地质矿产调查所,吉林长春130022

出　　处：《吉林地质》2003年第3期24-28,共5页Jilin Geology

摘　　要：在吉南样子哨坳陷北缘石道河镇一带,于元古代新老盖层间存在韧—脆性滑覆断层。盖层内部地层缺失、倒置现象普遍,褶皱形态表现为一系列倾伏褶皱—紧密同斜褶皱—平卧褶皱,据其形态特征可辩出两期性质不同褶皱幕。盖层与太古代基底之间存在明显的断层接触,并伴随基性岩浆侵入活动,具有滑脱构造后缘拉伸带的特征。There occurs ductile-brittle gliding-nappe faults in the Proterozoic, new and old cap rocks on the north margin of the depression in the Shidaohe area, Yangzhishao, southern part of Jilin Province. In the inner part of the rock, we found that stratigraphic gap and inversion, and the fold-shapes show a series of pitching fold, appressed homoclinal fold and recumbent. According to the fold-shape characteristics, the fold episodes with two different properties can be distinguished. There is obviously fault contact between the cap rock and Archeozoic rock basement, associated with basic magma intrusion and with the characteristics of the back margin tensile of décollement structure.

关 键 词：样子哨坳陷 重力滑脱构造 后缘拉伸带 吉南地区 

分 类 号：P542[天文地球—构造地质学]