Evolution of Granitoids in the Active Continental Margin: A Case Study of the Fuzhou
详细信息
- 责任者：Lin Qingcha (Anhui University of Science and Technology ; Huainan 232001 ; China) ; Cheng Xiongwei
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(7)
- 关键词：花岗岩类 ; granitoid ; 福建 ; Fujian Province
- 页码：p.1128-1133
- 图表：9 illus., 1 table, 22 refs.
- 分类号：0801
- 出版序号：810
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
///Southeast China,located at the interior part of Yangtze Block, Indian Plate and Pacific Plate and the southmost of the continental margin of Eastern Asian, has been most active region due to interaction between Eurasian Plate and Pacific Plate since the Mesozoic. LA-ICP-MS U-Pb dating of zircons from the granitoids of the Fuzhou compound complex in the active continental margin yields an age of 110 Ma for the early Jiantian granodiorite, an age of 100~107 Ma for the mid-stage Dangyang monozonitic granite, and an age of 95 Ma for the late-stage Kuiji alkaline granite. All these data suggest they formed in a Yanshanian epoch, equivalent to mid-or late Late Cretaceous. These data indicate that the Fuzhou compound complex evolved from early calci-alkaline I-type granite to late alkaline A-type granite, and correspondingly, emplacement lasted from mid- and late Early Cretaceous to early Late Cretaceous. The research shows that magmatism of the Fuzhou compound complex had been active for at least 15 Ma.