An Integrated Study of Deformation, Metamorphism, and Geo- chronology in the Archean Rocks Along the Northern Margin ofthe Quetico Subprovince in NE Minnesota and Adjacent Canada

含蓝晶石的矿物组合在太古宙中很少见，那里的高级深成变质地体往往以低压高温变质制度为主。这导致了人们对太古宙地温梯度较高的猜测，并限制了太古宙高级地体与与汇聚边缘板块构造环境建立了既定关系的年轻地体之间的类比。这项工作将扩大对明尼苏达州东北部魁北克省太古宙岩石的研究，那里存在蓝晶石，并已建立了板块构造模型。目的是确定地壳深部的变形和变质作用与邻近的向东暴露的带的浅层之间的关系。这一结果有望阐明太古宙板块背景和太古宙地温梯度的性质。

Kyanite-bearing mineral assemblages are rare in the Archean where high-grade plutonic-metamorphic terranes tend to be dominated by low-pressure high-temperature metamorphic regimes. This has led to speculations regarding higher geothermal gradients in the Archean and has restricted analogies between high-grade Archean terranes and younger terranes with established relationships to convergent margin plate tectonic settings. This work will expand on a study of Archean rocks in the Quetico subprovince of northeastern Minnesota where kyanite is present and a plate tectonic model has been developed. The objective is to determine the relationship of deformation and metamorphism in the deep crustal level to adjacent shallower levels of the belt exposed to the east. Results are expected to clarify Archean plate settings and the nature of the Archean geothermal gradient.