COLLABORATIVE RESEARCH: Tectonic Consequences of Ridge Subduction and Plate Reorganization; the Chugach MetamorphicComplex, Alaska

小行星9304062 大多数构造过程最终都是由板块运动驱动的，然而，除了最简单的情况外，两者之间的联系通常是模糊的。 最近对阿拉斯加楚加奇变质杂岩的研究表明，该杂岩的历史不仅与洋脊俯冲密切相关，而且与北太平洋板块重组密切相关，后者改变了俯冲洋脊附近的板块构造。 本项目将通过三维构造分析、地质年代学和地球化学技术对这一假说进行检验。 结果具有重要的意义，早期新生代北太平洋板块重建，最终结束了库拉板块的消亡。 此外，它提供了机会，以检查深坐的过程，伴随着脊沟脊三重连接的相互作用，涉及一个高度倾斜的组件上的一个肢体的三重连接。

9304062 Sisson Most tectonic processes are ultimately driven by plate motions, however the tie between the two is generally obscure except in the simplest cases. Recent work in the Chugach Metamorphic Complex of Alaska suggests that the history of the complex is intimately tied not only to ridge subduction but to a North Pacific plate reorganization that changed the plate configuration in the vicinity of the subducting ridge. This hypothsis will be tested in this project by three dimensional structural analysis, geochronology and geochemical techniques. Results have important implications for early Cenozoic North Pacific plate reconstructions that ultimately ended with demise of the Kula plate. In addition it offers the opportunity to examine deep seated processes that accompany ridge-trench- ridge triple junction interactions that involves a highly oblique component on one limb of the triple junction.