The Fluid Flow Path in the Costa Rica Accretionary Wedge

哥斯达黎加增生楔中的流体流动路径

• 批准号: 9302813
• 负责人: Marcus Langseth
• 金额: $ 21.78万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-01-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9302813&HistoricalAwards=false
• 关键词: Fluid; Flow; Path; Costa; Rica

9302813 Langseth This award will support a study of fluid flow through accreted sediments of the Costa Rica margin, the southern extension of the Middle America Trench. Fluid flow along other accretionary margins has been shown to be extremely important in controlling mechanical and chemical characteristics of such margins. The Costa Rica margin differs from other trench environments in having a low input of pelagic sediment on the underthrusting ocean plate and a low input of continental derived sediments. Underthrusting of the oceanic plate is high relative to other trenches and it therefore represents an endmember of trench environments. The objectives of the project are to locate sites of fluid venting, to sample the fluids and relate them to structural features of the margin, and to determine the heat-flow along the margin and its relation to fluid flow. In addition to examining the basic fluid low system on this margin, data from this project will be used for siting future drill holes in the region. The project is a cooperative study between scientists at the University of California at Santa Cruz, the University of California at San Diego, and Columbia University. The field program will be undertaken from the research submersible Alvin. ***

9302813朗塞特该奖项将支持对哥斯达黎加边缘--中美洲海沟的南部延伸部分--沉积沉积物中流体流动的研究。流体沿其他沉积边缘的流动已被证明对控制这些边缘的机械和化学特征极其重要。哥斯达黎加边缘与其他海沟环境的不同之处在于，在俯冲的大洋板块上，远洋沉积物的输入量较低，大陆来源的沉积物的输入量较低。大洋板块的俯冲作用相对其他海沟较高，因此它代表了海沟环境的一个端元。该项目的目标是确定流体喷发的地点，采样流体并将其与边缘的结构特征相关联，并确定沿边缘的热流及其与流体流动的关系。除了检查这一边缘的基本流体低系统外，该项目的数据还将用于该地区未来钻孔的选址。该项目是加州大学圣克鲁斯分校、加州大学圣地亚哥分校和哥伦比亚大学的科学家之间的合作研究。现场计划将在阿尔文号研究潜水器上进行。***