Emplacement of the Ultramafic Massifs of the Kenai Peninsula, Alaska and Their Possible Relationship to the Border Ranges Fault System

9706699库斯基板块构造学中一个长期存在的问题与镁铁质-超镁铁质杂岩如何融入俯冲混杂岩有关。在阿拉斯加的基奈半岛，有几个这样的身体暴露得特别好，保存得特别好。阿拉斯加的天体甚至更耐人寻味，因为它们代表着破碎的下地壳碎片。这个项目将通过野外工作、构造分析、地球化学和地质年代学的多方面方法来解决这个超镁铁质岩石的起源问题。结果将揭示，在将这些岩石带到地表的逆冲事件中，Klippen可以在多大程度上参与数百公里的运输，或者它们是否是被马伦格山脉卷起的俯冲洋板的一部分。

9706699 Kusky A long standing problem in plate tectonics relates to how mafic-ultramafic complexes become incorporated into subduction melanges. Several such bodies are particularly well exposed and preserved in the Kenai Penninsula, Alaska. The Alaskan bodies are even more intriguing because they represent pieces of broken up lower crust. This project will address this issue of the origin of ultramafic rocks by the multi-faceted approach of field work, structural analysis, geochemistry, and geochronology. The results will reveal to what extent large scale klippen can be involved in hundreds of km of transportation in an overthrusting event that brings such rocks to the surface, or whether they were part of the subducting oceanic slab that were caught up in the malenge.