湖南炎陵印支期隔槽式褶皱形成机制-地球科学与环境学报.PDF

28 4 Vol . 2 8 No . 4 2 0 0 6 12 　Journal of Earth Sciences and Environment 　 Dec. 2 0 0 6 1 2 1 1 柏道远 , 陈建成 , 孟德保 , 王先辉, 1 1 1 马铁球 , 张晓阳, 陈必河 (1. , 411100;2. 413 , 415000) [] 　, 。, 、, 。 , , , ; , , 。、 。, , , 。 , 。, () , , 。 [] 　;;;; [] 　P542　[] 　A　[]　167-2 6561(2006)04-0010-05 Forming Mechanism of Indosinian Trough-Like Folds in Yanling Region, Hunan 1 2 1 1 BAI Dao-yuan , CHEN Jian-cheng , MENG De-bao , WANG Xian-hui 1 1 1 MA Tie-qiu , ZHANG Xiao-yang , CHEN B-i he (1. HunanProvince Institute of Geology Survey, X iangtan 411100, Hunan, China;2. 413 Brigadeof Hunan Province Bureau of Geology and Mineral Exp loration andDevelop ent, Changde 415000, Hunan, China) Abstract:This paper carried out regional geological survey in Yanling area in order to study the characteristics and form- ing mechanism of the Indosinian folds in southeast Hunan. The survey declared that the uncomformity surface betw een Devonian Tiaomajian Formation and Predevonian basement make up anticlines and synclines, which indicate that the fo-l ded basement participated in Indosinian folding . On surface, the synclines have less width and less extending size than the anticlines;the hinge ends of synclines are clear, narrow and sharp, while the hinge ends of anticlines aren’t distinct. At section plane, the uncomformity surface is steep near the syncline core, and bec