造山演化过程中的伸展塌陷和巨量核部岩石剥露是具重要大陆动力学意义的前沿科学问题。本项目选择莱阳盆地及其边缘的苏鲁造山带，通过沉积学、构造地质学、地球化学和构造热年代学等多学科综合分析，集焦于莱阳盆地白垩系沉积物物源与苏鲁造山带高压－超高压变质岩隆升剥露过程这一核心问题，研究沉积地层碎屑（或砾石）成分，确定岩屑分散形式和蚀源区可能的岩石组成；研究盆地沉积岩同位素地球化学组成及其可能的蚀源区岩石端元，定量计算源区岩石端元对盆地沉积地层相对贡献；研究盆地沉积岩碎屑锆石U-Pb 年龄谱和Hf 同位素组成，获取不同沉积期源区岩石组成和变化的信息；研究来自于造山带的盆地沉积砾石中不同矿物封闭年龄，获取源区山脉各种岩块的隆升剥露速率和T-t 轨迹；研究盆地沉积岩和源区岩石的裂变径迹，揭示源区山脉的隆升史和沉积物埋藏史；进而，实现揭示苏鲁造山带巨量高压、超高压变质岩剥露过程及造山带伸展塌陷过程的目的。

Orogenic extensional collapse and the huge amount of the orogenic core rock exhumation are forefront scientific issues with important continental geodynamical significance. The project will select the Laiyang Basin and its edge Sulu orogenic belt, and do multidisciplinary and comprehensive analyses of sedimentology, structural geology, geochemistry and tectonic thermal geochronology. The focused key scientific issues of this project are the provenance of Cretaceous sediments in Laiyang Basin and uplift-exhumation process of high pressure (HP) and ultra-high pressure (UHP) metamorphic rocks in Sulu orogenic belt. This project will determine dispersal pattern of lithic fragments and rock development in source area through study on the detrital (or gravel) composition; quantitatively calculate contribution of rock end-members in source areas to basin sedimentary strata by studying on isotope geochemical composition of basin sedimentary rocks and their possible rock endmenbers in source areas; obtain the information of source-rock constitution and change at different stage by study of detrital zircon U-Pb age spectrum and Hf isotope composition; define uplift and unroofing rates and T-t trajectory of source regions in the Sulu orogenic belt by testing the thermal ages of different minerals in the sedimentary gravels; probe into mountain uplift and basin sediment burial history by measuring fission tracks of basin sedimentary rocks and source-area rocks. And then this project will achieve the purpose of revealing the exhumation process of the huge amount of HP and UHP metamorphic rocks and extensional collapse process of the Sulu orogenic belt.