RUI: Element Mobility Patterns, Volume Loss, and a Ballooning Diapir

岩体代表岩浆向地壳中增加，至少在侵入的程度上是如此。由于许多岩体相当大，地壳中必须提供空间来容纳增加的体积。空间问题已经被发现了很长时间，但随着对岩体侵位机制的研究，它的解决变得越来越重要。这个项目将检验这样一种观点，即岩体周围的宿主岩石的体积损失可能容纳一些所需的空间。该方法是对南加州白垩纪La Posta岩体周围的围岩进行化学质量平衡研究。结果将检验这一关于如何为侵入岩体提供空间的假设。

Plutons represent addition of magma to the crust, at least at the level of intrusion, and as many plutons are quite large, space must be provided in the crust to accommodate the increased volume. The space problem has been identified for a long time, but its resolution has become increasingly important as pluton emplacement mechanisms are studied. This project will examine the idea that volume loss of the host rocks surrounding a pluton may accommodate some of the required space. The approach is a chemical mass-balance study of wall rocks around the Cretaceous aged La Posta pluton in southern California. Results should test this hypothesis for how space is provided for intruded plutons.