Collaborative Research: Mantle Serpentinization and Water Cycling Through the Mariana Trench and Forearc

合作研究：马里亚纳海沟和弧前的地幔蛇纹石化和水循环

• 批准号: 0841074
• 负责人: Douglas Wiens
• 金额: $ 41.31万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-02-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0841074&HistoricalAwards=false
• 关键词: Collaborative; Research; Mantle; Serpentinization; Water

This project will utilize active- and passive source seismic techniques, using short period and broad band OBSs, respectively, in the Mariana forearc, trench, and outer rise, in order to image the distribution of upper mantle serpentinization. This study will address a central question regarding the importance of serpentinite for understanding subduction zones. The research will quantify the flux of water subducted by upper-mantle serpentinite, and explore the relationships between serpentinization and seismicity in the outer forearc and outer rise. Broader Impacts: This study has much relevance to arc magnatism and will help quantify the hydration state of the earth's mantle, thus addressing a primary goal of the Subduction Factory initiative of the MARGINS program. The project provides educational support for several graduate and undergraduate students.

该项目将利用主动和被动源地震技术，分别在马里亚纳弧前、海沟和外隆起使用短周期和宽带OBS，以便对上地幔蛇纹石化的分布进行成像。这项研究将解决一个核心问题，即蛇纹岩对于理解俯冲带的重要性。该研究将量化上地幔蛇纹岩俯冲的水通量，并探讨蛇纹石化与外弧前和外隆起地震活动之间的关系。更广泛的影响：这项研究与弧磁作用有很大关系，并将有助于量化地幔的水合状态，从而实现 MARGINS 计划的俯冲工厂计划的主要目标。该项目为多名研究生和本科生提供教育支持。