Dating New England: A Collaborative Study of the Timing of Metamorphism, Assembly, and Exhumation of the Central New England Orogen

0073754新英格兰的地质研究由来已久，泥盆纪阿卡迪亚造山运动期间新英格兰中部的演化被广泛理解为早泥盆世的碰撞事件。然而，关于该地体的变质作用、组装和折返的时间有许多问题，这些问题对该造山带和任何挤压造山带的发展都具有基础性的意义。该项目将使用强大的年龄测定新技术，以提供在经典阿卡迪亚研究中无法获得的详细年龄控制。预计结果将有助于将峰期变质作用的时间置于构造格架中，评估沿走向发生时间超前变质作用的可能性，并评估产生反转变质序列的情景。虽然侧重于它们的经典造山带，但这些关系的知识适用于开发所有造山带的演化模型。

0073754 Cheney0073747 SpearNew England has long been studied geologically, and the evolution of Central New England during the Devonian Acadian Orogeny is broadly understood as an early Devonian collisional event. However, there are a number of questions about the timing of metamorphism, assembly and exhumation of this terrane that are of fundamental significance in the development of this and any compressional orogen. This project will employ powerful new techniques of age dating to provide the detailed age control that was not available during the classic Acadian studies. Results are expected to help place the timing of peak metamorphism in a tectonic framework, to assess the possibility of time - transgressive metamorphism along strike and to evaluate scenarios for producing inverted metamorphic sequences. While focused on their classic orogen, knowledge of these relationships is applicable to developing models for the evolutions of all orogenic belts.