- 责任者：Hu Honglei (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Zhu Guang
- 刊名：Geotectonica et Metallogenia
- 出版年：2013
- 卷期：37(3)
- 关键词：前陆盆地 ; foreland basins ; 构造变形 ; tectonic deformation ; 苏北盆地 ; Subei Basin
- 页码：p.366-376
- 图表：5 illus., 41 refs.
- 分类号：0300
- issnNo：ISSN1001-1552
- isbnNo：CN44-1595/P
Owing to large-scale cover by the Subei Basin, features and formation mechanism of foreland structures in the Subei region, south of the Sulu Orogen, and east of the Tan-Lu Fault Zone remain unclear. Analyses of many exploration data for the Subei Basin and field survey of the marine cover exposures suggest that the marine cover in the Subei region experienced foreland deformation during the Indosinian period at the end of Middle Triassic, and regional detachment occurring between the cover and basement in the foreland fold and thrust belt were observed. The foreland deformation region can be divided into root belt, middle belt, and front belt from NW to SE. Strikes of thrusts and folds in the marine cover show an arc-like change from NNE to ENE from west to east, showing dragging influence of the sinistral faulting along the Tan-Lu Fault Zone. Structural features and denudation degree of the marine cover imply that the foreland deformation in the Subei region increase toward the Sulu Orogen and Tan-Lu Fault Zone. Characteristics and changes of the foreland structures demonstrate that the foreland deformation resulted from collision of the Sulu Orogen which is synchronous with continental deep subduction in the orogen. The arc-like change of the structural strikes and westward increase of the deformation intensity are caused by the sinistral faulting along the Tan-Lu Fault Zone during the foreland deformation rather than later faulting. The foreland deformation features support the view that the Tan-Lu Fault zone experienced large-scale sinistral faulting during the orogenic period.