COLLABORATIVE RESEARCH: Evolution of Plutonic Processes during Progressive Extension in a Metamorphic Core Complex: Mid-Crustal Granitic Rocks, Ruby Mountains, Nevada

岩浆侵入通常被认为在持续扩展中起作用，但扩展与侵入之间的因果关系却知之甚少。本项目旨在通过对位于内华达州北部盆地山脉高度延伸地区的一套侵入序列的研究，建立科迪勒兰变质核杂岩深部暴露岩体与变形的关系。在这种背景下，北红宝石山脉拉莫维尔峡谷的暴露提供了良好的暴露，丰富的同张拉侵入体和重要的地质年代和构造数据基础。这项工作涉及花岗岩的岩石学、地球化学和同位素研究，以跟踪花岗岩的时间组成变化，并利用这些数据估计伸展期和伸展期后中地壳岩浆的演化。研究结果将有助于建立地壳伸展过程中熔体生成和侵位的变化条件，并有助于检验岩浆活动在地壳深部变形中的作用。

9627814 Barnes Magmatic intrusion is commonly assumed to play a role in continual extension but the casual relationships between extension and intrusion are poorly understood. This project aims to establish the relationship between intrusion and deformation in deep-seated exposures in a Cordilleran metamorphic core complex by study of a sequence of intrusion emplaced in the Northern Basin Range, Nevada, a highly extended area. In this setting, exposures in the Lamoille Canyon, Northern Ruby Mountains provides a combination of excellent exposure, abundant syn extensional intrusions and a significant base of geochronological and structural data. This work involves petrologic, geochemical and isotopic study of granites to track the temporal compositional variations and to use these data to estimate the evolution's of the mid-crustal magmas during and after extensional episodes. Results are expected to help establish the changing conditions of melt generations and emplacement during crustal stretching, and to help test the role that magmatism plays in deep crustal deformation.