Comparison of Southeastern and Central Mariana Convergent Margin Processes: A Data Synthesis and Mineralogic Study

马里亚纳东南部和中部趋同边缘过程的比较：数据综合和矿物学研究

• 批准号: 9530079
• 负责人: Patricia Fryer
• 金额: $ 6万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9530079&HistoricalAwards=false
• 关键词: Comparison; Southeastern; Central; Mariana; Convergent

9530079 Fryer Fluid venting from sediments is a critical component of the overall mass geochemical balance along convergent continental margins where oceanic crust and sediments are underthrust. To date, little attention has been paid to this process at non-accretionary margins where underthrusting removes essentially all of the oceanic sediment. The present project will provide important new information on fluid venting in such regions by synthesizing available data on sediment chemistry and tectonics from the Mariana arc region where fluid venting is known to occur. The results of this study should provide a useful guide with which to examine the distribution and magnitude of venting through analysis of sediment chemistry and metamorphism, without the need for costly geological and geophysical surveys. ***

9530079弗赖尔沉积物中的流体排放是沿着会聚大陆边缘整体物质地球化学平衡的一个关键组成部分，在那里洋壳和沉积物是俯冲的。到目前为止，很少有人注意到这一过程中的非增生边缘，俯冲删除基本上所有的海洋沉积物。本项目将通过综合关于已知发生流体喷发的马里亚纳弧区沉积物化学和构造的现有数据，提供关于这些区域流体喷发的重要新信息。这项研究的结果应提供有用的指导，通过分析沉积物化学和变质作用，审查喷发的分布和规模，而不需要进行昂贵的地质和地球物理调查。 ***