Analysis of Magma Flow and Wall-Rock Deformation in Plutons Exposed at Different Structural Levels in the White-Inyo Range: Implications for Emplacement Mechanisms of Granitic..

白因约山脉不同构造层面暴露的岩浆流和围岩变形分析：对花岗岩侵位机制的启示

• 批准号: 9506525
• 负责人: Richard Law
• 金额: $ 15万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506525&HistoricalAwards=false
• 关键词: Analysis; Magma; Flow; Wall; Rock

The intrusion of magma into rocks representing various tectonic settings is a common phenomena, however how the crust accommodates the volume of magma and the mechanisms involved in emplacement of plutons are controversial. This project will examine four plutons that represent different depths of intrusion to determine the interactions between the internal structure of the plutons and their wall rocks under varying conditions. The work will involve study of magmatic fabrics using AMS analysis to determine the AMS signatures, the magmatic and solid-state microstructures and will be combined with other data to correlate the internal magmatic structures of the plutons to the solid state processes acting an their margins. Results will provide the bases for analysis of their emplacement mechanisms (which are controlled by a combination of pre-existing host rock structures, syn-intrusive regional stresses and magmatic pressures).

岩浆侵入不同构造背景的岩石是一种常见的现象，但地壳如何容纳岩浆的体积和侵位的机制是有争议的。 该项目将研究代表不同侵入深度的四个岩体，以确定在不同条件下岩体内部结构与其围岩之间的相互作用。 这项工作将涉及利用AMS分析研究岩浆组构，以确定AMS特征、岩浆和固态微观结构，并将与其他数据相结合，将岩体的内部岩浆结构与作用于其边缘的固态过程联系起来。 研究结果将为分析其就位机制提供依据，其就位机制受先存寄主岩石构造、同侵入区域应力和岩浆压力的综合控制。