Relation of Structural Style to Fluid Source, Migration, andVenting along the Oregon Subduction Zone

俄勒冈俯冲带构造样式与流体来源、迁移和喷发的关系

• 批准号: 8812731
• 负责人: LaVerne Kulm
• 金额: $ 70.83万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8812731&HistoricalAwards=false
• 关键词: Relation; Structural; Style; Fluid; Source

Accretionary prisms form along the landward side of deep- sea trenches in response to offscraping of oceanic sediments during lithospheric subduction. Several interrelated factors influence the evolution of these thick sediment prisms, including sediment composition, physical properties, rate of underthrusting and dewatering and fluid migration within the off-scraped sediment pile. Fluid migration and expulsion play an important role in the mechanical behavior, fluid pressure and lithification of sediments in the deformation zone. Previous research along the Oregon margin has identified significant areas of fluid discharge and venting. The purpose of the present study is to acquire side-scan sonar and multichannel seismic data with which to examine the structural setting of the Oregon margin and the vent locations. An attempt will be made to identify both the source and transport pathways of fluids in the accretionary prism.

增生棱柱体沿着向陆侧形成， 海沟对海洋沉积物刮下的反应 在岩石圈俯冲期间。几个相互关联的因素 影响这些厚沉积物棱柱的演变，包括 沉积物成分，物理性质，俯冲速率 以及刮下的碎屑内的脱水和流体迁移 泥沙堆积流体的运移和排流在 在力学行为、流体压力和岩化作用中的作用 变形带中的沉积物。 先前的研究沿着俄勒冈州边缘已经确定 流体排放和通风的重要区域。的目的 目前研究是获取侧扫声纳和多通道 地震数据，以检查结构设置的 俄勒冈州边缘和喷口位置。将尝试 确定流体的来源和运输途径， 增生棱柱