A Reexamination of the Ballooning Plutons Hypothesis

岩浆侵位是造山带从地幔和下地壳传递热量和物质的主要过程之一。对于岩体的强力就位，公认的模型之一是底辟岩的“气球膨胀”或原位膨胀。然而，许多用于支持气球的功能也可以在其他类型的就位期间发展。该项目将利用现代微观结构分析和卟岩-基质关系，重新研究几个被认为是由气球形成的经典岩体，为每个岩体建立和约束热力学模型。该研究结果将对花岗岩类侵位，特别是造山带变形变质作用的性质和时间，以及地壳中热量和岩浆的传递过程具有重要意义。

Emplacement of magmas represents one of the major processes in orogenic belts for transferring heat and materials from mantle and lower crustal levels. One of the accepted models for the forceful emplacement of plutons is that of "ballooning" or in situ inflation of a diapir. However, many of the features used to support ballooning can also develop during other types of emplacement. This project will re-examine several classic plutons thought to have formed by ballooning using modern micro- structural analysis and porphyroblast-matrix relationships to develop and constrain thermo-mechanical models for each. The results from this study will have important implications for the emplacement of granitoids, particularly the nature and timing of deformation/metamorphism in orogenic belts, and for the process of transferring heat and magma in the crust.