Evolution of the Grenville Terrane in Ontario

安大略省格伦维尔地体的演化

• 批准号: 8805083
• 负责人: Eric Essene
• 金额: $ 14.31万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8805083&HistoricalAwards=false
• 关键词: Evolution; Grenville; Terrane; Ontario

The Grenville terrane in the northern Appalachians now exposes the deeply buried parts of the crust that was involved in orogeny from 0.9 to 1.2 billion years ago. Previous work suggests that parts of the Grenville Terrane exposed in Ontario were buried as deeply as 40 to 45 km during metamorphism to upper amphibolite or granulite facies. This research will extend investigations aimed at taking advantage of the opportunity to study processes of movements along ductile faults and uplift and cooling patterns of such deep-seated rocks. A number of isotopic, petrologic and structural techniques will be used to define the metamorphic and geochronological history of the Grenville terrane. Results will help constrain tectonic and geochemical processes, including fluid flow, in deep crustal environments of collisional orogenic zones.

北方阿巴拉契亚山脉的格伦维尔山现在 暴露了地壳的深埋部分 从0.9亿年到12亿年前。 以前的工作表明 暴露在安大略的部分格伦维尔地体 在变质作用至上部变质作用期间， 角闪岩相或麻粒岩相。 这项研究将扩大 调查旨在利用机会， 研究了沿着韧性断裂和隆升的运动过程， 这种深层岩石的冷却模式 一些同位素， 岩石学和结构技术将被用来确定 格伦维尔岩的变质和年代学历史。 结果将有助于约束构造和地球化学过程， 包括流体流动在内的地壳深部碰撞环境 造山带