Geochronology and Geochemisty of the Neoproterozoic Granitoid Association from Eastern Segment of the Jiangnan
详细信息
- 责任者：Xue Huaimin (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Ma Fang
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(11)
- 关键词：S型花岗岩 ; S-type granite ; A型花岗岩 ; A-type granite ; 元素地球化学 ; elements geochemistry ; 缝合带 ; suture zones ; 扬子地台 ; Yangtze Platform
- 页码：p.3215-3244
- 图表：2 illus., 2 tables, 167 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
There are a series of Neoproterozoic granitoids developed in eastern segment of the Jiangnan orogen, LA-ICP-MS zircon U-Pb ages and whole-rock geochemical compositions were determined for those main granitoid intrusions,including Xucun body, Shexian body, Xiuning body, Lingshan body, Lianhuashan body and Shi’ershan body. The granitoid intrusions in the region can be classified into S-type and A-type in petrology and geochemistry, and the former belong to synorogenic magmatic rocks and are mainly granodioritic in component, while the latter belong to late-orogenic magmatic rocks and are granitic in component. The S-type granodioritic magma was generated by partial melting of immature metamorphic sedimentary-volcanic rock series under dynamic background of collision and crust thicken.