Effects of Ridge-Subduction on Mid-Ocean Ridge Magmatism; A Geochemical Study of the Chile Ridge

洋中脊俯冲对大洋中脊岩浆作用的影响；

• 批准号: 9116169
• 负责人: Emily Klein
• 金额: $ 18.27万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-12-15 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116169&HistoricalAwards=false
• 关键词: Effects; Ridge; Subduction; Mid; Ocean

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.

这是一个野外项目，收集智利海岭的岩石， 为了研究扩张脊在岩浆活动中的作用， 被淹没。 作者将检验两个假设：（1） 俯冲板块作为地幔上涌的盖层， 影响岩浆向脊轴的聚集;（2）断裂- 板片上部可以提供洋幔与地幔之间的交换 在Arc下 作者将研究元素和同位素 岩石的组成在不同的距离从沟槽。