Tectonic Feature and Strain Pattern of Changling Sag on the Southern Edge of Songliao Basin , China
详细信息
- 责任者：Shan Wei (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Liu Shaofeng
- 刊名：Geological Bulletin of China
- 出版年：2009
- 卷期：28(4)
- 关键词：构造样式 ; tectonic style ; 断陷盆地 ; fault-downwarping basins ; 松辽平原 ; Songliao Plain
- 页码：p.431-438
- 图表：9 illus., 1 table, 9 refs.
- 分类号：0300
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
By means of structure-stratigraphy method, based on the knowledge of faulting active phase, pattern of the basin edge as well as tectonic deformation traced by deposition record, with the help of systematic 2 dimension structure-stratigraphy balance recovery, it is indicated that during the developing process of Changling sag, there was clockwise rotating from NE-SW to EW along the expanding direction. This movement generally happened at the same time as formation of Lower Cretaceous Shahezi Group. During the extension period of Changling sag, strain pattern changed from pure shear which caused graben-type extension structural pattern developed in the early stage to simple shear formed half-graben-type in later.