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

0073852 Simpson0001150格罗梅特阿根廷含有基底岩石，这些岩石对于理解冈瓦那古太平洋边缘的古生代演化以及那里发生的事件与劳伦西亚阿巴拉契亚边缘发展的可能关系至关重要。最近对东部Sierras Pampeasas构造复杂岩石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矛盾。该项目将测试和进一步调查这些构造和变质特征是大陆边缘/增生棱柱的结果，而不是经历了海脊俯冲的可能性。这一结果对重新组装冈瓦那超大陆的尝试具有相当大的影响。

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.