摘要
EnChDivSummary name="EnDivSummary">The marine and transitional sediments were dominated during Early or Middle Jurassic in the Qiaoyuan Formation of Kuitan area in Huilai, Guangdong Province. The samples were analyzed by the whole rock analysis and the ICP-MS trace elements analysis. Based on the Dickinson diagram,Zr-Th, La-Th-Sc,Th-Co-Zr/10 discrimination diagrams and the eigenvalues comprehensive analysis for trace elements, the tectonic setting is the back-arc extrusion basin, which with the characteristics of a continental island arc and few passive continental margin component. The sediments are from the volcanic arc belt.