Pluton Roofs: Testing Pluton Emplacement Hypotheses

在大量岩浆侵位期间， 岩石材料被转移出的路径 上升/膨胀的岩浆体，但这正是 完成是一个长期存在的问题。 该项目将 通过研究选定的例子来探讨这个问题， 岩体顶部（与更常见的 保存的墙壁）可供研究，希望他们 保留了空间容纳机制的证据， 在岩体壁中不明显。 这项工作将涉及 详细测绘、应变分析、组构研究和其他 微结构技术来限制三维 与侵位有关的构造重建 变形 耶灵顿岩基，内华达州， 鲍威尔岩基，蒙大拿州和其他例子将 研究了 结果将说明材料是如何转移的 并将有助于改善 岩体侵位与岩浆房演化之间的关系

During emplacement of large masses of magma, country rock material is transferred out of the path of the ascending/inflating magma body, but precisely how this is accomplished is a long-standing problem. This project will approach the question by examining selected examples in which pluton roofs (as opposed to the more commonly preserved walls) are available for study, in the hopes they preserve evidence for the space-accommodating mechanism that is not evident in pluton walls. The work will involve detailed mapping, strain analysis, fabric study and other microstructural techniques to constrain three-dimensional structural reconstructions of emplacement-related deformation. The Yerington batholith, Nevada, the Mount Powell batholith, Montana and other examples will be studied. Results will address how material was transferred during emplacement and will help refine the relationship between emplacement of plutons and magma chamber evolution.