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

该项目是对南极洲干旱河谷中的万达岩脉群进行的实地和实验室调查。这些岩脉横切罗斯造山运动期间产生的寒武-奥陶纪花岗岩类岩体，标志着俯冲停止和伸展岩浆活动开始之间的过渡。许多垂死的会聚板块边缘转变为伸展岩浆活动，而干谷提供了一个极好的机会来研究经历这种转变的板块的浅根。由于其特殊的曝光，双峰长英质和镁铁质成分，和复杂的字段关系，万达岩脉有可能揭示南极构造历史的这一重要阶段的见解。更广泛的影响包括一个主要的本科生和两个研究机构之间的合作，并支持本科生参与一个令人兴奋的，基于实地的研究项目。

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.