New Progresses in 1∶50 000 Regional Geological Survey in Chengbu Area ,Hunan
详细信息
- 责任者：Liu Wei (Hunan Institute of Geological Survey ; Changsha 410011 ; China) ; Liu Yaorong
- 刊名：Geology and Mineral Resources of South China
- 出版年：2011
- 卷期：27(4)
- 关键词：区域地质调查 ; regional geological survey ; 湖南 ; Hunan Province
- 页码：p.307-313
- 图表：5 illus., 14 refs.
- 分类号：2100
- 出版序号：20122792
- issnNo：ISSN1007-3701
- isbnNo：CN42-1417/P
摘要
Stratigraphic framework,tectonic framework and magmatic evolutionary series have been established in 1∶50 000 regional geological survey in Chengbu,southwestern Hunan Province. The deposition of Huangshidong Formation of Qingbaikouan system is at (828±10) Ma which is yielded by zircon SHRIMP U-Pb dating. According to the contact relationship, rock characteristics and the isotope ages new-acquired, the authors subdivided the granite-bodies in Chengbu area into 12 intrusive periods, 31 intrusive masses, and merged into four magmatic evolutionary series. The new discovery of gneissose granite of Qingbaikou period greatly improved the study of magmatic rocks in this area.