福建明溪--台湾新生代火山作用与壳幔作用及深部过程

This project is the basic research on petrology and geochemistry. The research focus on the petrology, isotopic chronology, trace elements and isotopic tracer measurement of the Cenozoic volcanic rocks and their mantle-derived xenoliths from the Southeast Coast of China using lithoprobe, and demonstrating the crust-mantle interaction and deep processes of the continental rift and subduction. Set up the model of the interaction between Ocean lithosphere and continental lithosphere. .The important achievements include: ①demonstrate the similarity in petrology, rock series and geochemistry of volcanic rocks between the Southeast Coast of China and the South China Sea; ②according the spreading of the South China Sea, volcanism is divided into three stages: pre-spreading, spreading and post-spreading, and the research has demonstrated the feature and evolution of asthenosphere and the lithosphere spreading speed during three stages respectively, and supplied the setting of deep processes for the formation and evolution of the marginal sea(the South China Sea) .③The research has demonstrated that the evolution of the primary magma in studied area has evolution series of retrogressive rifting. ④The research has demonstrated the Cenozoic volcanism and deep processes in Eastern China.⑤The research has demonstrated the effect of the Pacific plate subduction on the continental lithosphere in the Southeast Coast of China, and set up the preliminary model for deep processes. ⑥The research has demonstrated the effect of asthenospheric upwelling /mantle plume on the continental lithospheric mantle in the Southeast Coast of China, and set up the preliminary model for deep processes. ⑦set up the model of the interaction between Oceanic lithosphere and continental lithosphere.The important data acquired in doing the research include:① The applicant finished a set of trace element analyses of the volcanic rocks and mantle xenoliths by means of ICP-MS at MIT; electronic probe analysis of high quality; completed a set of XRF analysis of the volcanic rocks from the studied area with the help of Dr. J. M. Rhodes, the Department of University Massachusetts. ② The collaborator from Taiwan supplied a set of Ar-Ar isotope age of the typical volcanic rocks. These data are of high quality and have been recognized by scholars in the world, which are the basis and guarantee of finish of the project and publication of the articles abroad. .

运用火成岩探针新技术，通过对东南沿海、澎湖及台湾北部新生代火山岩（及其深源包体）作为统一体系的岩石学、同位素定年、痕量元素，同位素示踪系统和流体动力学的研究，阐明大陆裂谷和俯冲作用的壳幔相互作用及深部过程、以及它们的相互制约的关系。建立大洋岩石圈和大陆岩石圈相互作用的综合模式，具有某种全球性意义。.