大洋中高出海底1000m以上的地貌/地质单元海山蕴含有丰富的板内火山活动、洋壳增生、俯冲过程、金属成矿等重要地质信息。雅鲁藏布江缝合带，作为中生代时期全球超级大陆（Pangea）在东部的宽阔喇叭口大洋——新特提斯洋的遗留，保存了较多的古海山。拟在野外地质调查和剖面观测基础上，通过基座火成岩岩相学、岩石地球化学及锆石U-Pb同位素年代学分析，查明古海山的形成时代及大地构造属性；通过沉积盖层的生物地层学、火山灰锆石U-Pb同位素年代学和沉积相分析，阐明基座形成之后的古海山延续时代、古水深、沉积环境及其变化；结合基座与盖层之间的接触关系及相关剖面的时序对比，确定古海山的发育时限、结构类型、层序与旋回；进而在年代格架下揭示并精确刻画古海山的驱动力及其发展历史，为重建新特提斯洋古海洋、古构造格局和古地理提供科学证据。

Seamounts, the topographic highlands 1000 m above seabeds, document lots of important information on intraplate volcanic activity, oceanic crust accretion and subduction process. As the relict of the several thousands kilometers wide Neo-Tethys Ocean, where have ever been located in the eastern open ocean of the supercontinent Pangea during the Mesozoic era, the Yarlung Zangbo suture zone has preserved seamounts, which are crucial to resocnstruct the disappeared ocean. Based on the observation and measurement of cross sections in southern Tibet, we will analyze the lithofacies, geochemistry, and zircon U-Pb geochronology of the basement rocks to obtain the age and tectonic property of paleosemounts, and study the biostratigraphy and lithofacies of the sedimentary caps with zircon U-Pb geochronology of volcanic ash intercalation to explore the seamount age, paleodepth, depostional environment and their change after the formation of the basement. By the combination of the contact relationship of basement and cap as well as the section correlation along the suture, the total age interval, texture, sequence, and cycles will be determined to reveal and to precisely delineate the geodynamics and evolution history of the seamounts, providing newly geoscientific materials and data for the reconstruction of the Neo-Tethys Ocean in paleoceanography, paleotectonics, and paleogeography.