RUI: Geographic and Temporal Geochemical Variations in Volcanic Rocks from the Philippine Plate

本项目将研究菲律宾海始新世-中新世岩浆的地理和时间地球化学变化，这将有助于更好地了解菲律宾板块岩浆成因和岛弧及弧后岩浆成因。提出的研究将解决以下问题：1)西菲律宾、帕雷斯维拉和四国盆地熔岩化学变化的程度和原因是什么？这些盆地熔岩与其他弧后盆地相比如何？2)帕劳九州弧熔岩与前后喷发的盆地熔岩之间的微量元素差异是什么？是什么原因导致了这些差异以及所发现的系统同位素差异？3)什么是Benham隆起？这些熔岩与海洋岛屿玄武岩相比如何？4)始新世-渐新世帕劳-九州弧、中新世西菲律宾弧与现代活动岛弧之间是否存在系统的地球化学差异？这些差异对菲律宾板块的演化意味着什么？

This project will investigate the geographic & temporal geochemical variations among Eocene-Miocene lavas from the Philippine Sea which will dead to better understanding of Philippine plate magma genesis and island arc & back arc magma genesis in general. The proposed study will address the following questions: 1) what is the extent & cause of chemical variation in West Philippine, Parece Vela, and Shikoku basin lavas? How do these basin lavas compare with other back-arc basins? 2) What are trace element differences between Palau Kyushu arc lavas & basin lavas erupted before & after them? What is the cause of these and the systematic isotope differences found? 3) What is the Benham Rise? How do these lavas compare with oceanic island basalts? 4)Are there systematic geochemical differences between the Eocene-Oligocene Palau-Kyushu arc, the Miocene West Philippine arc and modern active island arcs? What do these differences mean about evolution of Philippine plate?