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).

岩浆侵入代表各种构造环境的岩石是一种常见的现象，但是，地壳如何适应岩浆的体积和岩石降级的机制是有争议的。 该项目将检查四个代表不同侵入深度的岩体，以确定在不同条件下的岩体内部结构与其壁岩石之间的相互作用。 这项工作将涉及使用AMS分析对岩浆织物进行研究，以确定AMS特征，岩浆和固态微观结构，并将与其他数据结合使用，以将Pluton的内部岩浆结构与固态过程的内部岩浆结构相关联，使其缘缘起来。 结果将为分析其安置机制提供基础（通过预先存在的宿主岩石结构，同步触觉的区域应力和岩浆压力的组合控制）。