Genesis of Nanyili Granite in Bikou Block, Northwest Margin of Yangtze Plate
详细信息
- 责任者：Luo Jincheng (State Key Laboratory of Ore Deposit Geochemistry ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Lai Shaocong
- 刊名：Acta Geoscientica Sinica
- 出版年：2011
- 卷期：32(5)
- 关键词：花岗岩 ; granite ; 岩石地球化学 ; lithogeochemistry ; 扬子地台 ; Yangtze Platform
- 页码：p.559-569
- 图表：6 illus., 1 table, 46 refs.
- 分类号：0801
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
The Nanyili granite pluton is located in Bikou block on the northwestern margin of the Yangtze Plate. This paper reports the geochemistry of the Nanyili granite and discusses its genesis, ore-forming material source and geological significance. The results show that the Nanyili granite pluton was formed in a typical post-collsional tectonic environment. It is probable that the collision between the North China and Yangtze plates during the Triassic resulted in obvious thickening of the crust. Under the extension and thinning tectonic mechanism, the metabasaltic and metapelitic rocks of the crust were partially melted through the amphibolitic dehydration.