Thermomechanical Development of the Internal Zone and Linkage with the Fold and Thrust Belt, Central Brooks Range, Alaska

阿拉斯加的布鲁克斯山脉是一个主要的碰撞带，包含一个高压/低温岩石的变质核心。这些变质核中的蓝片岩和绿片岩相岩被认为是中中生代中北向岛弧与较老的被动大陆边缘碰撞的结果。侦探他最近在该地区的工作表明，在中央布鲁克斯山脉片岩带中提出的一个主要逆冲实际上是一个地层接触，有证据表明，大块变形主要是收缩变形，而不是其他工作者提出的伸展变形。该项目将研究布鲁克斯山脉内部变质带和外部变质带之间过渡的岩石学、结构和地质年代学。它将调查内部和外部区域之间的联系，并研究碰撞造山事件期间伸展和收缩的贡献。研究结果将广泛适用于各主要造山带。

9405560 Patrick The Brooks Range of Alaska is a major collisional belt that contains a metamorphic core of high pressure/low temperature rocks. It is thought that these blueschist and greenschist facies rocks in the metamorphic core resulted form a mid-Mesozoic collision between a north-facing island arc and an older passive continental margin. The P.I.'s recent work in the area has shown that a proposed major thrust in the schist belt of the Central Brooks Range is in fact a stratigraphic contact and there is evidence to suggest that the bulk deformation was mostly contractional, rather than extensional as proposed by other workers. This project will examine the petrology, structure and geochronology of the transition between the internal metamorphic zone and the external zone of the Brooks Range. It will investigate the links between the internal and external zones and examine the contributions of extension and contraction during the collisional orogenic event. The results of this work will be broadly applicable to all major orogenic belts.