地质调查与研究Issue(2)：114-122,130,10.
鲁东地区古元古界形成的大地构造环境探讨
Palaeoproterozoic Tectonic Setting in the Eastern Shandong Province
摘要
Abstract
The eastern Shandong area is a typical place where the Jingshan group and Fenzishan group (JFG for short) of Palaeoproterozoic formation outcrop, and it is famous for the gigantic reserves of talc, magnesite and graphite deposit. There has been a lot of controversy over the tectonic setting of JFG, with mainly three types of controversial academic view points: rift basin, active continental margin area and subduction-accretionary com-plex. After synthetical analysis of the above view points, this work discusses the tectonic setting of JFG through its stratigraphic sequence, rock assemblage,deformation,metamorphism, palaeotectonic environment and the changes of structure location and intensity during its evolutionary process. The article concludes that the JFG probably formed in the back-arc basins along continental margin. Both Jingshan group and Fenzishan group are all exposed to the paleoproterozoic collisional orogeny. The former probably formed in back-arc basins environ-ment, with the same characteristics as ancient island arc or back-arc extension. The latter probably formed in back-arc basins subduction-accretionary complex. The high-pressure metamorphic granulite facies rocks of Jing-shan group probably resulted from the plate subduction and collision.关键词
形成环境/大地构造/增生杂岩/岛弧/弧后盆地/鲁东地区Key words
forming environment/tectonic/accretionary complex/island arc/back-arc basin/eastern Shandong分类
地质学引用本文复制引用
..鲁东地区古元古界形成的大地构造环境探讨[J].地质调查与研究,2013,(2):114-122,130,10.基金项目
国家矿产资源潜力评价项目山东省成矿地质背景研究 （）
