Simulation of magma ascent prior to the high risk caldera forming eruptions of Campi Flegrei in the frame of CFDDP

Campi Flegrei深部钻探项目(CFDDP)提供了一个独特的机会，可以采样大量的火山岩和不安宁的CF火山口的火山灰。寒武纪Ignimbrite(CI)岩浆储存和上升的实验模拟，以及与钻探自然样品的结构和结构分析的对比，将对CI超级喷发的机制有更深刻的认识。在汉诺威和图宾根的这些协调项目中，我们将通过实验模拟P和T升高的相关岩浆过程。这两个项目密切相关(即研究相同的材料)，但涉及不同的方面。汉诺威会议的主要重点是研究CI岩浆的热力学性质(相平衡、挥发分溶解度)，而Tübingen会议的主要重点将是动力学(即CI岩浆在受控减压下的行为)。相关系和减压引起的脱气结晶作用显着影响上升和喷发岩浆的动力学性质，这些特征记录在CI火山岩和火山灰的结构模式中。实验数据将为钻探的CI岩石和火山灰样品的解释提供有用的约束，为高危坎帕尼亚火山区和可比火山系统的火山危险性评估提供有用的工具。

The Campi Flegrei Deep Drilling Project (CFDDP) offers the unique opportunity to sample a substantial sequence of volcanic rocks and ashes of the restless CF caldera. Experimental simulation of Campanian Ignimbrite (CI) magma storage and ascent and comparison with texture and structure analysis of drilled natural samples will give deep insight into the mechanisms of the CI super eruptions. In these coordinated projects at Hannover and Tübingen we will simulate the relevant magmatic processes experimentally at elevated P and T. Both projects are closely interrelated (i.e. same materials are studied), but covers different aspects. While the major focus in Hannover is on studies of thermodynamic properties of CI magmas (phase equilibria, volatile solubilities), the major focus in Tübingen will be on kinetics (i.e. behaviour of CI magmas under controlled decompression). Phase relations and decompression induced degassing and crystallization significantly affect dynamic properties of ascending and erupting magmas which are recorded in the textural patterns of the CI volcanic rocks and ashes. The experimental data will provide useful constraints for the interpretation of drilled CI rock and ash samples, providing useful tools for volcanic hazard assessment at the high risk Campanian Volcanic District and comparable volcanic systems.