Pre-eruptive conditions of the Campanian Ignimbrite eruption: Experimental constraints from phase equilibria and volatile solubility studies and its implication for the Campi Flegrei drilling project

Campanian Ignimbrite 喷发前的条件：相平衡和挥发性溶解度研究的实验限制及其对 Campi Flegrei 钻探项目的影响

基本信息

批准号：
166944350
负责人：
Professor Dr. Harald Behrens
金额：
--
依托单位：
Institut für Mineralogie
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/166944350?language=en
关键词：
Pre eruptive conditions Campanian Ignimbrite

项目摘要

A prerequisite for the understanding and modeling of volcanic and degassing processes at Campi Flegrei is (1) the determination of magma storage conditions, (2) the understanding of magma replenishment processes, especially the composition, temperature, volatile contents of the new magmas injected in magmatic chamber and (3) the simulation of degassing and crystallization processes during magma ascent. So far experimental data and thermodynamic models at elevated pressures and temperatures, allowing us to gain this information, are scarce and can not be directly applied for the phonolitic and trachytic systems of Campi Flegrei. Such information is crucial for the interpretation of drilling products and of observations at the planned drilling site at Campi Flegrei (CFDDP). In this proposal we plan to investigate long term processes in the magma chamber(s), such as crystallization and differentiation, as well as short term processes resulting from new magma inputs occurring in the Campi Flegrei magma chamber prior to eruptions (e.g., degassing, mixing, re-equilibration). Processes during magma ascent from the magma chamber to the surface will be explored in Tübingen (see application of M. Nowak). Different experimental approaches (i.e. phase equilibria, kinetic experiments, solubility of mixed H2O-CO2-Cl-S-bearing volatiles in silicate melts) using trachytic and phonolitic rocks from the Campanian Ignimbrite will be used to investigate magma storage conditions, the properties of end-member magmas before replenishment, as well as the composition of fluids coexisting with melts in the magma chamber. The knowledge of these parameters is crucial to understand and model the evolution of rheological magma properties, fragmentation, eruptive style, which are recorded in the textural patterns of the Campanian Ignimbrite and of the volcanic ashes. The experimental data will provide useful constraints for volcanic hazard assessment at the high risk Campi Flegrei Volcanic Area.

（1）确定岩浆存储条件的确定，（2）对岩浆复制过程的理解，尤其是在岩浆室内注入新的岩浆的挥发物，尤其是在岩浆室和（3）在岩浆中的模拟，对岩浆复制过程的理解，尤其是新的岩浆的挥发物，以及（3）在Magma的模拟过程中，对岩浆复制过程的理解，（2）对岩浆复制过程的理解，（2）对岩浆复制过程的理解，以及（2）在岩浆中注入新的岩浆的挥发物，是对岩浆复制过程的理解。到目前为止，在升高压力和温度下的实验数据和热力学模型，使我们能够获得此信息，稀缺，无法直接应用于Campi Flegrei的语音和气管系统。此类信息对于在Campi Flegrei（CFDDP）计划的钻井现场解释钻探产品和观察至关重要。在此提案中，我们计划研究岩浆室中的长期过程，例如结晶和分化，以及在爆发前发生在Campi Flegrei Magma室中新的岩浆输入引起的短期过程（例如，脱胶，混合，混合，重新平衡）。岩浆上升期间从岩浆腔到表面的过程将在Tübingen中探索（请参阅M. Nowak的应用）。 Different experimental approaches (i.e. phase equivalent, kinetic experiments, solubility of mixed H2O-CO2-Cl-S-bearing volatiles in silicone melts) using trachytic and phonolitic rocks from the Campanian Ignimbrite will be used to investigate magma storage conditions, the properties of end-member magmas before replenishment, as well as the composition of fluids coexisting with melts in the magma chamber.这些参数的知识对于理解和建模流变学岩浆性能，碎片，喷发样式的演变至关重要，这些特性，碎片，喷发样式记录在Campanian Ignimbrite和火山灰的质地模式中。实验数据将为高风险Campi Flegrei火山区的火山危害评估提供有用的限制。