板块构造理论中俯冲作用早阶段的地质响应形式是有待解决的重大科学问题，中国东南部侏罗纪火成岩可能形成于古太平洋板块俯冲作用早阶段。本项目拟在以往研究基础上，选择受关注程度较低的中国东南部侏罗纪中酸性火山岩为研究对象，对区域内具代表性的火山岩地层进行系统的野外地质和岩石学研究，通过多手段联合示踪揭示它们的岩浆起源，反演岩浆演化过程。考虑到岩石圈应力环境（挤压或伸展）是制约深部幔源岩浆在岩石成因中参与形式的关键因素，重点关注幔源组分贡献在不同地区不同时代火山岩成因中的差异和变化，以解析岩石圈应力环境的变迁。通过本项目研究工作，可以对中国东南部侏罗纪构造-岩浆作用获得创新和深入的认识，为板块构造理论中俯冲作用早阶段的地质响应形式等基础问题研究做出贡献。

This project, based on previous studies, intends to carry out detailed researches on the petrogenesis of the Jurassic intermediate-acidic volcanic rocks from representative stratigraphic sections in SE China, which are yet to be investigated substantially. The aims of the work are (1) to unravel the temporal-spatial distribution of the Jurassic volcanic rocks; (2) to identify their magmatic sources by multi-approach tracing techniques; and (3) to reveal the magmatic evolution processes. Note that deep mantle-derived magmas involving in the igneous petrogenesis are primarily controlled by the lithospheric stress state, the temporal-spatial differences of the mantle-derived material contribution would be estimated by paying particular attention. This work will help to enhance our understanding of the Jurassic tectono-magmatism in SE China, and provide further insights into the geological response to the early stage of subduction for the plate tectonic theory.