Collaborative Research: The Transition from Subduction to Extensional Magmatism in the Dry Valleys of Antarctica

合作研究：南极洲干谷从俯冲到伸展岩浆作用的转变

• 批准号: 0636607
• 负责人: Michael Garcia
• 金额: --
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-15 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0636607&HistoricalAwards=false
• 关键词: Collaborative; Research; Transition; Subduction; Extensional

This project is a field and laboratory based investigation of the Vanda dike swarm in the Dry Valleys of Antarctica. These dikes crosscut Cambro-Ordovician granitoid plutons produced during the Ross Orogeny, and mark the transition between the cessation of subduction and the onset of extensional magmatism. Many dying convergent plate margins convert to extensional magmatism, and the Dry Valleys provide a magnificent opportunity to examine the shallow roots of a plate that experienced this transition. Because of their exceptional exposure, bimodal felsic and mafic compositions, and complex field relations, the Vanda dikes have the potential to reveal insights into this important phase of Antarctic tectonic history. The broader impacts include collaboration between a primarily undergraduate and two research institutions, and support for undergraduate participation in an exciting, field-based research project.

该项目是对南极干山谷中Vanda Dike群的基于现场和实验室的研究。这些堤防交叉凸轮 - 山cambro-ordovician花岗岩岩石岩石造成的造山基因，并标志着俯冲停止与延伸岩浆作用之间的过渡。许多垂死的收敛板边缘转化为延伸岩浆，干山谷为检查经历过这种过渡的板块的浅根提供了巨大的机会。由于它们的特殊暴露，双峰鳞和镁铁质组成以及复杂的田间关系，Vanda Dikes有可能揭示对这一南极构造历史的重要阶段的见解。更广泛的影响包括主要是本科生和两家研究机构之间的合作，以及支持本科生参与一个令人兴奋的基于现场的研究项目。