Collaborative Research: Testing Models that Describe the Origin of Compositional Diversity of Subduction Zone Magmatism, Aeolian Islands

火山岩提供了一个完整的，多尺度的记录，控制岩浆形成的过程。 使用理论和分析工具，这项工作将记录的关键过程，导致形成的岩浆在伊奥利亚群岛，意大利。伊奥利亚的火山被选为研究地点，因为它们的成分多样，地质年轻;因此，它们代表了研究年轻火山如何以及为什么爆发的主要地点。除了增强我们对这些岩浆如何形成和演化的理解外，这项工作还将有助于描述这个年轻岩浆系统的特征，例如岩浆体在地球表面下的深度以及喷发前岩浆的挥发性成分。这些数据可以为火山学家提供信息，帮助他们探索火山爆发的时间和方式，从而有可能加强火山灾害评估和减灾工作。 这项工作采用了两种方法。一个是相平衡模型的应用，其开发是由国家科学基金会资助的，以记录导致伊奥利亚群岛岩浆形成的过程的热力学。计算机模拟的结果允许对火山岩的特殊特性进行预测。使用最先进的分析工具，这些预测将通过收集一套选定的岩石的地球化学，结构和现场数据进行测试。理论预期和这些新的数据的比较将允许相平衡模型的优点和缺点进行评估，也将导致有据可查的假设如何形成的风成火山。如果这种最先进的理论和分析工具的结合是成功的，它将影响科学家如何通过提供一种方法来研究复杂的岩浆系统，通过这种方法可以理解源表面成分的多样性。由于相平衡模型的改进是一个持续的目标，这项工作也将提供输入，将告知模型的改进。

Volcanic rocks provide an integrated, multi-scale record of the processes that govern how magmas form. Using both theoretical and analytical tools, this work will document the critical processes that led to the formation of magmas in the Aeolian Islands, Italy. The volcanoes of the Aeolians were chosen as the study sites because they are compositionally diverse and geologically young; they thus represent prime places to study to how and why young volcanoes erupt. In addition to augmenting our understanding of how these magmas form and evolve, this work will also help characterize features of this young magmatic system such as the depth at which the magma bodies reside under the surface of Earth and the volatile content of the magmas prior to eruption. Such data can provide information to volcanologists who explore when and how volcanic eruptions initiate, thereby potentially enhancing volcanic hazard assessment and mitigation. This work utilizes two approaches. One is application of a phase equilibria model, the development of which was funded by the National Science Foundation, to document the thermodynamics of processes that led to formation of magmas in the Aeolian Islands. Results of computer modeling allow predictions to be made about particular characteristics of the volcanic rocks. Using state-of-the-art analytical tools, these predictions will be tested by collecting geochemical, textural and field data on a selected suite of rocks. Comparison of theoretical expectations and these new data will allow the strengths and weaknesses of the phase equilibria model to be assessed and will also lead to well documented hypotheses about how the Aeolian volcanoes formed. If this marriage of state-of-the-art theoretical and analytical tools is successful, it will impact how scientists approach studying complex magmatic systems by providing a methodology by which source to surface compositional diversity can be understood. Because improvements to the phase equilibria model are an on-going goal, this work will also provide input that will inform model improvements.