Geochemistry and Tectonic Setting of the Cambrian Siliceous Rocks in the Zhejiang-Guangxi-Guizhou Zone
详细信息
- 责任者：Huang Hua (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wang Guozhi
- 刊名：Sedimentary Geology and Tethyan Geology
- 出版年：2011
- 卷期：31(1)
- 关键词：硅质岩 ; silicolite ; 元素地球化学 ; elements geochemistry ; 浙江 ; Zhejiang Province ; 贵州 ; Guizhou Province ; 广西 ; Guangxi
- 页码：p.100-106
- 图表：7 illus., 1 table, 21 refs.
- 分类号：0803
- issnNo：ISSN1009-3850
- isbnNo：CN51-1593/P
摘要
The tectonic setting of the Cambrian siliceous rocks in the Zhejiang-Guangxi-Guizhou zone are discussed with the aid of major and rare earth element geochemistry. The results show that the Cambrian siliceous rocks in the Zhejiang-Guangxi-Guizhou zone were formed in the continental-margin environment or transitional zone from the continental margin to deep sea. LREEs are more enriched in the siliceous rocks from early rift basins than those from the ancient Huanan residual oceanic basin and Yangtze block. The siliceous rocks formed during tectonic extension tend to have hydrothermal origin, and display the REE distribution patterns of being depleted in LREE and positive Eu anomaly.