Collaborative Research: Evaluation of a Ridge Subduction Model for the Early Paleozoic Evolution of the Pampean Orogen, Argentina

grometargenina包含的基底岩是了解冈瓦纳古太平洋边缘古生代演化以及那里的事件与劳伦西亚阿巴拉契亚边缘发展的可能关系的关键。最近对东塞拉斯-帕米亚纳斯构造复杂的岩石进行的研究得出的数据与现有的大陆碰撞导致这一边缘演化模型的预测相冲突。该项目将测试并进一步调查构造和变质特征是大陆边缘/增生棱镜经历脊俯冲的结果的可能性。这些结果对重新组装冈瓦纳超大陆的尝试具有相当大的意义。

0073852 Simpson0001150 GrometArgentina contains basement rocks that are key to understanding Paleozoic evolution of the paleo-Pacific margin of Gondwana and the possible relationship of events there to the development of the Appalachian margin of Laurentia. Recent work in the structurally complex rocks of Eastern Sierras Pampeanas has produced data in conflict with predictions of existing models of the evolution of this margin by a continental collision. This project will test and further investigate the possibility that the structures and metamorphic signatures are the result of a continental margin/accretionary prism that underwent ridge subduction instead. Results have considerable implications to attempts to reassemble the Gondwana supercontinent.