Andean Back Arc Processes in Argentina

阿根廷安第斯山后弧过程

• 批准号: 0310113
• 负责人: John Booker
• 金额: --
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2008-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0310113&HistoricalAwards=false
• 关键词: Andean; Back; Arc; Processes; Argentina

The investigators propose a magnetotelluric (MT) experiment in the back arc Andean region where the subducted Nazca plate flattens out before it descends steeply under Argentina. The experiment is designed to distinguish whether a low electrical resistivity zone reflects either partially melted asthenosphere or a global increase in solid state conductivity through the transition zone. The study will also test whether a basaltic volcanic province with geochemistry similar to Ocean Island Basalts (OIB) found just south of the Nazca flat slab are a surface manifestation of the process generating melting associated with the plate subduction. Broader impacts include international collaboration and education with Argentine colleagues.

研究人员建议在安第斯弧后地区进行大地电磁（MT）实验，在那里俯冲的纳斯卡板块在急剧下降到阿根廷下方之前就已经消失了。 该实验旨在区分低电阻率区是否反映了部分熔融的软流圈或通过过渡区的固态电导率的全球增加。 这项研究还将测试是否有一个玄武岩火山省的地球化学类似于海洋岛玄武岩（OIB）发现的纳斯卡平板南部是一个表面表现的过程产生熔融与板块俯冲。 更广泛的影响包括与阿根廷同事的国际合作和教育。