Age Constraints on Tectonism and Metamorphism in the Scandinavian Caledonides

小行星9418264 斯堪的纳维亚加里东山脉提供了一个不寻常的机会，研究事件和过程与大陆碰撞，因为它是相对简单的，涉及一个单一的造山循环，并被侵蚀，使外来和本地岩石都暴露。 该项目与挪威和瑞典的研究人员合作，旨在改善对俯冲导致高压变质和主要逆冲叠瓦作用形成构造地层组合等构造过程的时间限制。 详细的地质年代学研究将使用高精度U-Pb和其他方法，直接确定关键地区变质作用和变形组构的年代。 研究结果沿着野外构造研究，将有助于更准确地认识这一典型造山带的发育过程。

9418264 Gromet The Scandinavian Caledonides provide an unusual opportunity to study events and processes associated with a continental collision because it is relatively simple, involving a single orogenic cycle, and is eroded so that both allochthonous and autochthonous rocks are exposed. This project, in conjunction with researchers in Norway and Sweden, is directed at providing improved time constraints on tectonic processes such as subduction leading to high-pressure metamorphism and assembly of a tectonostratigraphy by major thrust imbrication. Detailed geochronlogic studies will use high-precision U-Pb and other methods to directly date metamorphism and deformational fabrics in key areas. Results, along with field structural studies, will lead to more precise understanding of the development of this classic orogen.