Comparison of Protolith Assemblages of Metamorphic Rocks in the Dabie-Sulu Orogen and the Late Mesozoic Magmatic Rock Associations in the Coastal Region of Zhejiang and Fujian Provinces: Implications for the Neoproterozoic Tectonic Setting of Northeastern Yangtze Block

• 责任者：Qiu Jiansheng (School of Earth Sciences and Engineering ; Nanjing University ; Nanjing 210093 ; China) ; Hu Jian
• 刊名：Geological Journal of China Universities
• 出版年：2010
• 卷期：16(4)
• 关键词：变质岩 ; metamorphic rocks ; 火成岩 ; igneous rocks ; 大地构造 ; tectonics ; 大别山 ; Dabie Mountains ; 苏鲁造山带 ; Su-Lu Orogenic Belt
• 页码：p.413-425
• 图表：6 illus., 65 refs.
• 分类号：0300
• issnNo：ISSN1006-7493
• isbnNo：CN32-1440/P

The Dabie-Sulu orogenic belt is tectonically situated in the northeastern margin of the Yangtze Block. In this paper, the protolith assemblages and geochemical characteristics of these metamorphic rocks are systematically compared with those of the Late Mesozoic igneous rock associations in the coastal area of Zhejiang and Fujian provinces. The results have shown that they share quite similar features which can be summarized as follows: 1) igneous rock types in both regions are dominated by acidic members with the basites constituting only about 5%, and there is a bimodal rock association with the acidic rocks as the predominant components; 2) the dominant acidic rocks in both regions can genetically be categorized into I-type granitoids, but a few of them show features of A-type granites; and 3) the geochemical characteristics of basites in both regions are also quite similar.