Structural and Magmatic Disruption of an Accretionary Wedge During Ridge Subduction, Kenai Peninsula, Southern Alaska

阿拉斯加南部基奈半岛山脊俯冲期间增生楔的结构和岩浆破坏

• 批准号: 9304647
• 负责人: Timothy Kusky
• 金额: --
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-15 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304647&HistoricalAwards=false
• 关键词: Structural; Magmatic; Disruption; Accretionary; Wedge

The consumption of oceanic plates beneath continental plates at subduction zones is a fundamental component of seafloor spreading. The subduction of active spreading ridges at these zones is thought to produce profound changes to the overriding plate in terms of magmatism, mineral deposits, structural deveopment, as well as sedimentation and development of the accretionary wedge that builds up at the edge of the subduction zone. This later phenomena is poorly understood but important because accretionary wedges contain some of the world's largest oil and gas deposits. This project will collect new field structural data and use theoretical analysis to construct 3-D models of the accretionary wedge. These new data will provide the sort of database needed to test recent evolutionary models.

在俯冲带，大洋板块在大陆板块之下的消耗是海底扩张的一个基本组成部分。人们认为，在这些地区活动伸展脊的俯冲作用对上覆板块产生了深远的变化，包括岩浆作用、矿床、构造发育，以及在俯冲带边缘形成的增生楔的沉积和发育。人们对后一种现象知之甚少，但它很重要，因为增生楔含有一些世界上最大的石油和天然气矿床。该项目将收集新的现场结构数据，并使用理论分析来构建吸积楔的三维模型。这些新数据将为测试最近的进化模型提供所需的数据库。