COLLABORATIVE RESEARCH: Isotopic Constraints on the Crustal Evolution and Tectonic History of the Trans-Hudson Orogen, Saskatchewan

拟议的研究涉及两个人之间的合作努力 地质年代学实验室，以研究地壳演化的跨， 萨斯喀彻温省哈德逊造山带。 具体而言，该地区是 被解释为一个古老的（约1.8-1.9 Ga）碰撞带， 岛弧火山的残余被挤压在太古代 大陆边缘 PI计划记录时空模式， 造山带的发展，并研究相关的 岩浆过程，以确定比例幔源少年 相对于先前存在的重熔程度的火成岩材料 地壳。 由于这条带被现代冰川作用很好地暴露， 提供了一个机会，详细研究一个古老的 例如，类似于现代喜马拉雅山的山脉带。 成熟的U-Pb锆石和全岩Sr-Nd、Rb-Sr和U-Pb 系统学将用于确定关键地质单元的年龄 可作为推断岩浆来源的成岩标志。

Proposed research involves a collaborative effort between two geochronology laboratories to study crustal evolution in the Trans- Hudson orogenic belt, Saskatchewan. Specifically, this region is interpreted to be an ancient (ca 1.8-1.9 Ga) collision zone in which remnants of island arc terranes were compressed against an Archean continental margin. The PIs plan to document time-space patterns for development of this orogenic belt and to investigate associated magmatic processes to determine the proportion mantle-derived juvenile igneous material relative to the extent of remelting of preexisting crust. Because this belt is well-exposed by modern glaciation, it offers an opportunity to study in detail the exumed roots of an ancient mountain belt that is analogous to the modern himalayas, for example. Well-established U-Pb zircon and whole-rock Sr-Nd, Rb-Sr, and U-Pb systematics will be employed to determine ages of key geologic units and as petrogenetic indicators to deduce magma sources.