COLLABORATIVE RESEARCH: Evolution and Assembly of Archean and Lower Proterozoic Elements in the Trans-Hudson Orogen Saskatchewan

大陆地壳组装成大型大陆克拉通通常涉及几次大陆-大陆碰撞。这种碰撞的相对浅层部分可以在活动或年轻的系统中处理，例如喜马拉雅山脉，然而，深层部分只在古代造山带中暴露出来。该项目由锡拉丘兹大学和加州大学圣克鲁斯分校合作，将研究萨斯喀彻温省东北部太古宙Rae-Hearne地台和边界雪鸟构造带的地壳演化，以记录太古宙和早元古代地壳生长，并评估1.8Ga造山带内末端碰撞的影响。由于大约20公里的地壳已经被抬升和侵蚀剥离，因此将直接研究造山作用的中地壳水平的观点。这些结果不仅有助于了解哈德逊造山带的太古宙事件，而且有助于了解总体上挤压构造环境的更深层次。

The assembly of continental crust into large continental cratons typically involves several continent-continent collisions. Relatively shallow level parts of such collisions can be addressed in active or young system such as the Himalaya, however, deep portions are only exposed in ancient orogens. This project, a collaboration between Syracuse University and University of California, Santa Cruz, will investigate the crustal evolution of the Archaean Rae-Hearne platform and the bounding Snowbird Tectonic zone in northeastern Saskatchewan to document Archean and early Proterozoic crustal growth and to evaluate the effect of terminal collision within the orogen at 1.8 Ga. Because approximately 20 km of crust has bee removed by uplift and erosion, a view of mid- crustal levels of orogeny will be directly studied. Results are expected to help understand not only Archean events in the Trans- Hudson orogen but also deeper parts of compressional tectonic settings generally.