Sustained Observations of Subseafloor Pressures at ODP Advanced CORKs at the Nankai Trough Accretionary Prism

南海海槽增生棱镜 ODP 先进软木塞海底压力的持续观测

• 批准号: 0825210
• 负责人: Keir Becker
• 金额: $ 25.83万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0825210&HistoricalAwards=false
• 关键词: Sustained; Observations; Subseafloor; Pressures; ODP

Recent installation of a well-head bridge plug at the A(advanced)CORK site in the Nankai Trough now permits continued monitoring of pressures with superior resolution in geological formations of a subduction zone (upper basement of incoming plate, plate boundary fault itself, and overlying sediments). This important time series of pressure measurements will be made from two ACORKs deployed during IODP leg 196: 1) a reference hole (1173B) through the sediment column in the oceanic plate and 2) at a deep site (hole 8081) at the frontal thrust of an accretionary prism. From these measurements relationships between subseafloor fluid pressures, fluid flow, and tectonic strain events will be made.Broader Impacts: Relationships between subseafloor pressures and earth quake cycles have societal relevance. The research wiIl support graduate research, strengthen international collaborations between RSMAS-JAMSTEC-GSC, and make good use of existing ODP observatories such as ACORKs

最近在南海海槽的A（高级）CORK现场安装了井口桥塞，现在可以继续监测俯冲带地质构造（传入板块的上基底、板块边界断层本身和上覆沉积物）中的压力，并具有上级分辨率。这一重要的压力时间序列测量将从IODP第196航次期间部署的两个ACORK进行：1）通过海洋板块沉积柱的参考孔（1173 B）和2）在增生棱柱体前缘冲断层的深部位置（8081孔）。从这些测量之间的关系，海底流体压力，流体流动，和构造应变events.Broader影响：海底压力和地震周期之间的关系具有社会意义。该研究将支持研究生研究，加强RSMAS-JAMSTEC-GSC之间的国际合作，并充分利用现有的ODP观测站，如ACORKs