Collaborative Research: Structure of the Nicaragua/Costa Rica Subduction Zone: A Framework for the Subduction Factory and Seismogenic Zone Initiatives

合作研究：尼加拉瓜/哥斯达黎加俯冲带的结构：俯冲工厂和地震带倡议的框架

• 批准号: 9909859
• 负责人: Eli Silver
• 金额: $ 14.81万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909859&HistoricalAwards=false
• 关键词: Collaborative; Research; Structure; Nicaragua; Costa

Silver99-09859 Recommended Project is for a multichannel seismic (MCS) survey of the subducting ocean crust off the coasts of Nicaragua and Costa Rica in support of both SEIZE and Subduction Factory objectives in this Margins program study area. The primary objective is to characterize the changing structural nature of the subducting Cocos plate, and to try to relate these changes to known chemical segmentation of the volcanic arc, best shown by ratios such as Ba/La that reflect relative changes in material input into the subduction zone. The MCS survey will be supplemented by three wide-angle, ocean bottom hydrophone (OBH) refraction lines, two perpendicular and one parallel to the trench, as well as by Hydrosweep swath bathymmetry, gravity, and magnetics data. This proposed study is part of a larger, international effort, using the German research vessel R/V Sonne. The MCS and Hydrosweep surveys would be conducted aboard the R/V Maurice Ewing, using its 6 km-long streamer. The R/V Sonne will be used to supply, deploy and recover the OBH's, which will themselves be supplied by GEOMAR.******

Silver99-09859推荐的项目是针对尼加拉瓜海岸和哥斯达黎加海岸的多通道地震（MCS）调查，以支持在此边缘计划研究区域中夺取和俯冲工厂目标。 主要目的是表征俯冲可可板的结构性变化，并试图将这些变化与火山弧的已知化学分割联系起来，最好通过BA/LA等比率表示，这些比率反映了俯冲区域材料输入的相对变化。 MCS调查将补充三个广角，海洋底部水文（OBH）折磨线，两条垂直线和一根与沟槽平行的，以及Hyderrosweep Swath的测深，重力和磁性数据。 这项拟议的研究是使用德国研究船R/V Sonne进行的更大国际努力的一部分。 MCS和Hydrosweep调查将在R/V Maurice Ewing上使用其6 km长的彩带进行。 R/V Sonne将用于供应，部署和恢复OBH，其本身将由Geomar提供。******