Microstructural Characteristics of Anchanghe-Guanyinba Fault Zone in the Yangshan Gold Deposit of Gansu Province and Their Geological Significance
详细信息
- 责任者：Dai Yanpei (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Zhu Yudi
- 刊名：Geology in China
- 出版年：2012
- 卷期：39(3)
- 关键词：断裂带 ; fracture zones ; 显微构造 ; ultrastructure ; 甘肃 ; Gansu Province
- 页码：p.729-739
- 图表：6 illus., 2 tables, 47 refs.
- 分类号：0300
- issnNo：ISSN1000-3657
- isbnNo：CN11-1167/P
摘要
///The Yangshan gold deposit in Gansu Province, the largest gold deposit in China, lies in the Shaanxi- Gansu-Sichuan triangle area of the western Qinlin Orogen. Based on the field work, the authors carried out systematic microstructural researches on tectordtes of Anchanghe-Guanyinba fault zone, in the hope of reflecting the macroscopic structure by means of the microscopic structure. According to the research results, the authors hold that the transition of metamorphic facies in the fault zone was high greenschist facies→low greenschist facies→facies lower than greenschist facies from Middle-Late Triassic, whereas the deformation sequence being in order of ductile→ductile-britfle→brittle. The values of regional principal stress were changed from high to low and the regional principal stress orientation was SN compressional→NE compressional→NW and SN compressional.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |