Submarine Volcanism and Arc Rifting in the Sumisu Rift, Bonin Arc

这是一个继续研究地球化学的项目， 分析ALVIN号在Sumisu考察期间获得的样品 裂谷，一个早期弧后盆地的所在地，以及春日河 交叉链 分析将有助于了解玄武岩 弧后裂谷作用、流纹岩形成和 地幔源区 %%% 地质学的一个基本问题是了解 以及地质系统如何演化。 以来 地质过程通常太慢， 真实的时间，人们必须检查系统在不同的状态， 进化并尝试拼凑这个过程。 弧后盆地 是整个过程中需要理解的一个重要特征， 海底演变 重要的是开展工作，如 由吉尔提出的一个初期盆地。

This is a project to continue work on the geochemical analyses of samples obtained during ALVIN expedition to Sumisu Rift, the site of an incipient back-arc basin, and the Kasuga cross chain. Analyses will contribute to understanding of basalt differentiation during back-arc rifting, rhyolite formation, and mantle sources. %%% A fundamental problem in geology is to understand how processes operate over time and how geological systems evolve. Since geological processes are generally much too slow to observe in real time one has to examine systems in various states of evolution and try to piece together the process. Back-arc basins are an important feature to understand in the overall process of seafloor evolution. It is important to carry out work such as proposed by Gill on an incipient basin.