Quantifying magmatic processes of pantellerites from Mayor Island (Tuhua), Taupo Volcanic Zone, New Zealand

新西兰陶波火山区马约尔岛（Tuhua）潘泰勒石岩浆过程的量化

• 批准号: 2719583
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2719583
• 关键词: Quantifying; magmatic; processes; pantellerites; Mayor

Mayor island is a Quaternary island of New Zealand found westwards of the Taupo Volcanic Zone. The island exhibits a wide range of eruption styles and sizes, including catastrophic behaviour such as Plinian eruptions and caldera forming events.This research project aims to quantify the pressure-temperature conditions of the pantellerite magma genesis and ascent that occurs beneath Mayor Island. A range of methods will be employed to investigate this aim, including, field observations, laboratory studies and modelling. Fieldwork will include detailed and targeted analysis due to the newly created geological map of the island allowing for the overall geology of the island to be clearly understood without the need for widescale mapping. Laboratory work will include petrological and textural analysis, both static and dynamic high P-T experiments, and rheological experiments. Once this work has been done, the results can be applied to model the flow properties of magma and explore the underlying controls on the transition between explosive and effusive phases.The outcome of this work will result in an overall model for Mayor Island. This will subsequently become locally important as it will help to constrain future monitoring efforts in the case of future volcanic unrest, which is considered to be fairly likely due to the last Plinian eruption being ~6300 years ago despite an average repose period of 4000 years. Furthermore, the outcomes may have global importance because the improved understanding of this island could be applied to the poorly understood pantellerite islands throughout the world.

马约尔岛是新西兰的一个第四纪岛屿，位于陶波火山带以西。马约尔岛的火山喷发类型和规模多种多样，包括普林尼式火山喷发和火山口形成等灾难性事件。本研究项目旨在量化马约尔岛下方发生的碱碲岩浆成因和上升的压力-温度条件。将采用一系列方法来研究这一目标，包括实地观察、实验室研究和建模。实地工作将包括详细和有针对性的分析，因为新绘制的岛屿地质图使人们能够清楚地了解岛屿的总体地质情况，而无需进行比例尺绘图。实验室工作将包括岩石学和结构分析，静态和动态高P-T实验，以及流变学实验。一旦这项工作已经完成，其结果可以应用于模拟岩浆的流动特性，并探索潜在的控制之间的过渡爆炸和溢出phase.The这项工作的结果将导致马约尔岛的整体模型。这随后将成为当地重要的，因为它将有助于限制未来的监测工作，在未来的火山动荡的情况下，这被认为是相当有可能的，因为最后一次普林尼火山喷发是约6300年前，尽管平均休眠期为4000年。此外，这些成果可能具有全球重要性，因为对这个岛屿的进一步了解可以应用于世界各地对pantellerite岛屿知之甚少。