Tectonic Environment of the Metamorphosed Basement in the Jiangnan Orogen and Its Evolutional Features
详细信息
- 责任者：Wang Ziqiang (China University of Geosciences ; Beijing 100083 ; China) ; Gao Linzhi
- 刊名：Geological Review
- 出版年：2012
- 卷期：58(3)
- 关键词：基底构造 ; basement tectonics ; 江南古陆 ; Jiangnan Old Land
- 页码：p.401-413
- 图表：6 illus., 1 table, 51 refs.
- 分类号：0300
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
///There are many different ideas about the forming and evolution of the metamorphosed basement of the “Jiangnan Orogen”. This paper tries again to discuss its tectonic types and evolution features, based on regional stratigraphic correlation, volcanic—sedimentary assemblages, tectono-deformation, a large amount of isotopic dating in recent years, the distribution of magmatic rocks and analysis of tectonic environments of muscovite-peraluminous granite (MPG) and cordierite-peraluminous granodiorite (CPG). The authors consider that the “Jiangnan Orogen” can not correlated with the 1 100～950 Ma “Grenvillian Orogen” in the formation of the metamorphosed basement and its tectonic evolution. It was the deposits of the continental margin of different blocks after Rodinia super continent was broken up. They underwent 820～780 Ma “regional” Jinningian movement and reformed the Middle and Late Neoproterozoic continental margin of the Yangtze Oldland.