Dome-and-Basin Pattern in Central Hunan Province: Stages and Genesis of Fold Superposition

• 责任者：Wang Jian ( Key Lab. of Submarine Geosciences and Prospecting Technique ; MOE ; College of Marine Geoscience ; Ocean University of China ; Qingdao 266100 ; China) ; Li Sanzhong
• 刊名：Geotectonica et Metallogenia
• 出版年：2010
• 卷期：34(2)
• 关键词：叠加褶皱 ; superposed folds ; 构造变形 ; tectonic deformation ; 湖南 ; Hunan Province
• 页码：p.159-165
• 图表：6 illus., 1 table, 27 refs.
• 分类号：0300
• issnNo：ISSN1001-1552
• isbnNo：CN44-1595/P

There are three groups of angular unconformities in central Hunan Province. Similarly the deformation is divided into three stages: Caledonian, Early Indosinian, Late Indosinian and Yanshanian, producing four structural levels. Each structural level has distinct characteristics. Caledonian and Early Indosinian folds strike in E-W. The Qiyang arc-shape structure occurred in Late Indosinian period. However, the sinistral strike-slip faults with northeast-north to northeast strikes formed in the Yanshanian period. By analyzing the characteristics of fold superposition, this paper proposes that the structural type of dome-and-basin in central Hunan Province was resulted from one-stage Caledonian and two-stage Indosinian fold superpositions, being reformed by the Yanshanian sinistral strike-slip faulting.