Heat Flow and Thermal Structure of the Cascadia Subduction Zone

卡斯卡迪亚俯冲带的热流和热结构

• 批准号: 8817176
• 负责人: David Blackwell
• 金额: $ 7.96万
• 依托单位: Southern Methodist University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1992-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817176&HistoricalAwards=false
• 关键词: Heat; Flow; Thermal; Structure; Cascadia

The thermal structure of the lithosphere block overriding a subduction zone is complicated and diverse with surface heat flow values ranging from the highest to the lowest regional values on the earth. The thermal characteristics of the Cascadia subduction zone in the Pacific Northwest of the United States have been extensively studied during the last 15 years, especially as regards the geothermal potential of the Cascade volcanic arc. As a side result of these studies some data has been collected in the low heat flow outer arc block as well. As the primary objective of the project these data will be used to develop a time-dependent three-dimensional temperature model of the subduction zone and the outer arc block. This temperature model will be used as a basis for evaluating the mechanical characteristics of the zone as a way to investigate the potential for large subduction zone type earthquakes and to explore the unique setting of the Cascadia subduction as the reason that no deep focus earthquakes are associated with the zone.

岩石圈块体的热结构 俯冲带复杂多样，地表热流 从最高到最低的区域值， 地球 卡斯卡迪亚的热特性 美国太平洋西北部的俯冲带 在过去的15年里得到了广泛的研究， 特别是关于喀斯喀特的地热潜力， 火山弧 作为这些研究的一个副作用， 也被收集在低热流外弧块中。 作为 该项目的主要目标是这些数据将用于 建立一个随时间变化的三维温度模型， 俯冲带和外弧块体。 该温度 模型将被用作评估机械性能的基础。 作为调查潜在的 大型俯冲带型地震，并探索 卡斯卡迪亚俯冲的独特背景， 深源地震与该带有关。