COLLABORATIVE RESEARCH: Petrologic, Isotopic, and Structural Evolution of Low-Pressure Metamorphism in an Accretionary Complex, Eastern Chugach Mountains, Alaska

合作研究：阿拉斯加东楚加奇山脉增生杂岩中低压变质作用的岩石学、同位素和结构演化

• 批准号: 9020391
• 负责人: Virginia Sisson
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9020391&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Petrologic; Isotopic; Structural

The metamorphic and structural consequences of ridge subduction along a convergent margin are not well known, but is significant because virtually all convergent margins will ultimately consume a spreading center. This collaborative project between EAR90-18717 and EAR90-20391 will examine the Chugach metamorphic complex which possesses several unusual features that can be attributed to ridge subduction in the Tertiary. Work will focus on the anomalous low P, high T metamorphic and the structural and kinematic setting which accompanied the formation of this metamorphic assemblage. Results will lead to a general model for ridge subduction-related tectonics.

沿着会聚边缘的山脊俯冲的变质和结构后果尚不清楚，但意义重大，因为实际上所有会聚边缘最终都会消耗扩张中心。 EAR90-18717 和 EAR90-20391 之间的这个合作项目将研究楚加奇变质杂岩，该杂岩具有一些不寻常的特征，这些特征可归因于第三纪的山脊俯冲。 工作重点是异常低磷、高温变质作用以及伴随该变质组合形成的结构和运动学背景。 结果将产生与洋脊俯冲相关的构造的通用模型。