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

9627814巴恩斯岩浆侵入通常被认为在持续伸展中起作用，但伸展和侵入之间的因果关系却知之甚少。该项目旨在通过对位于内华达州北部盆地山脉的侵入体序列的研究，建立科迪勒变质核杂岩中深部暴露的侵入体与变形之间的关系。在这种背景下，红宝石山脉北部拉莫耶峡谷的曝光提供了良好的曝光、丰富的同伸展侵入体以及重要的地质年代学和构造数据基础。这项工作涉及到花岗岩的岩石学、地球化学和同位素研究，以追踪花岗岩的时间成分变化，并利用这些数据来估计伸展幕期间和之后中地壳岩浆的演化。这些结果有望帮助建立地壳拉伸过程中熔体产生和侵位的变化条件，并有助于检验岩浆作用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.