深海远洋泥质沉积物详细连贯的记录了不同地质时期的沉积物来源变化。通过海洋沉积物的地球化学特征不仅可以有效确定来源、颗粒物的搬运过程，还可以了解其沉积时大陆的气候及大气循环特征。菲律宾海北部的四国海盆第四纪沉积属于远洋-半远洋沉积，其泥岩沉积主要来源于我国中纬度西风带区的风力沉降，记录了第四纪时期大陆气候的变化。本申请人所在研究团队成员作为船上科学家参加了IODP333航次工作，获取了四国海盆C0011钻孔完整的第四纪样品。本项目拟通过对采集到的沉积物样品进行详细的矿物学以及微量元素和Sr-Nd同位素分析，来确定四国海盆沉积物来源在第四纪时期的变化，同时讨论我国北部中纬度西风带区的气候变化特征。

The deep sea sediment record all the source of sediments in different geologic period. The geochemistry of the sediment constrains the provence and the process of particle transport , helps the understanding of the climate on continentsal and atmospheric circulation. Quaternary sediments in the Shikoku located on the north of the Philippine sea is hemiplagic-plagic deposit, the fine fraction is mainly sourced from the weathering products derived from the Asian continental crust, transported into the north Pacific by the middle-latitude westerlies and contributes largely to plegaic sediments. In this project we aim to study the mineralogy, trace elements, and Sr-Nd isotopic compositions of the Quateranry sediments, in an attempt to determine their origin and discuss the variation of the climate on the Asian continent.