Origin and Evolution of the Great Falls Tectonic Zone: Implications for the Assembly of Southern Laurentia and Rodinian Connections

大瀑布构造带的起源和演化：对南劳伦西亚和罗迪尼亚连接组合的影响

• 批准号: 0106592
• 负责人: Paul Mueller
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0106592&HistoricalAwards=false
• 关键词: Origin; Evolution; Great; Falls; Tectonic

0106592MuellerThe Great Falls tectonic zone is a NE-trending feature that extends from northeastern Idaho to the Montana - Saskatchewan border, and may represent the collisional suture between the Archean Wyoming province and the Hearne province of the Canadian shield. However, recent work has raised the alternative interpretation that the Great Falls tectonic zone is an intracontinental shear zone reactivated by the Trans-Hudson orogeny and another feature represents the Wyoming-Hearne suture. This project will examine newly documented 1.86 Ga meta-igneous rocks of the Great Falls tectonic zone that will address several fundamental issues associated with the assembly of southern Laurentia and the breakup of Rodinia. Results are expected to help clarify the interpretation of the significance of the Great Falls tectonic zone in relation to the development of the Pacific Northwest.

0106592穆勒大福尔斯构造带是一个从爱达荷州东北部延伸到蒙大拿州-萨斯喀彻温省边界的东北向特征，可能代表了太古代怀俄明州省和加拿大地盾赫恩省之间的碰撞缝合线。 然而，最近的工作提出了另一种解释，即大福尔斯构造带是由跨哈德逊造山带重新激活的陆内剪切带，另一个特征代表怀俄明-赫恩缝合线。 该项目将研究新记录的大福尔斯构造带的1.86 Ga变火成岩，将解决与劳伦蒂亚南部的组装和Rodinia的分裂相关的几个基本问题。 研究结果将有助于阐明大福尔斯构造带对太平洋西北部发展的意义。