Effects of Ridge Subduction on Mid-Ocean Ridge Magmatism: AGeochemical Study of the Chile Ridge

这是一个从智利山脊收集岩石的野外项目，目的是研究扩张山脊被俯冲时对岩浆作用的影响。作者将检验两个假设：(1)俯冲板块作为地幔上涌的盖层，影响岩浆向山脊轴线的形成；(2)俯冲板块的解体可以提供大洋地幔与弧下地幔之间的交换。作者将研究距离海沟不同距离的岩石的元素和同位素组成。

This is a field project to collect rocks from the Chile Ridge in order to study the effects on magmatism when a spreading ridge is being subducted. The authors will test two hypotheses: (1) that the subducting slab acts as a cap on upwelling of the mantle and affects the foucsing of the magma to the ridge axis; (2) the break- up of the slab can provide exchange between ocean mantle and mantle under the arc. The authors will study the elemental and isotopic composition of rocks at varying distances from the trench.