Research on Palaeotectonic Stress Field and Its Evolution in Fanchang Area, Anhui Province
详细信息
- 责任者：Xu Kangkang (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Du Yangsong
- 刊名：Geoscience
- 出版年：2012
- 卷期：26(3)
- 关键词：构造应力场 ; tectonic stress field ; 安徽 ; Anhui Province
- 页码：p.498-507
- 图表：5 illus., 2 tables, 13 refs.
- 分类号：0300
- issnNo：ISSN1000-8527
- isbnNo：CN11-1856/P
摘要
Fanchang area is an important segment of the Lower and Middle Yangtze iron-copper-gold metallogenic belt,and the ore deposits are evidently controlled by structures.Field investigation and measurement have been carried out on the folds,faults and joints in this area,with determination on the principal stress directions of the multiphase structural activities through deformation characteristics observation and structural set analysis.The directions of the main palaeotectonic stress fields were EW and SN during pre-Indosinian,NNW during Indosinian,EW during early Yanshanian,NWW during late Yanshanian,NE and EW during Himalayan period.On the basis of the study,an analysis has been completed on the evolution of palaeotectonic stress field in the Fanchang area.Furthermore,it shows that the main tectonic evolution was from Indosinian to late Yanshanian.