Magma-reservoir evolution following edifice destruction at Krakatau and Ritter Volcanoes

调查建筑物的破坏如何影响岩浆系统的演化。扇形崩塌是影响火山系统的最大体积事件之一，越来越多的证据表明，表面负荷的相关变化可能对底层岩浆库的稳定性产生深远影响，表现为喷发速率或成分的变化以及主导的喷发行为。然而，缺乏对岩浆系统如何受到破坏性事件扰动的详细了解，因为在生成跨越崩溃前和崩溃后时期的过去喷发活动的高分辨率重建方面存在挑战。该项目将利用两个独特的数据集来解决这一问题：在里特岛（巴布亚新几内亚）近海收集的海洋沉积物样本和与2018年Anak Krakatau（印度尼西亚）崩溃有关的样本。除此之外，还有可能增加更多的数据集，以评估更长的时间尺度，包括蒙特塞拉特近海的物质样本。这些数据集保存了主要崩塌前后的活动记录，可以促进我们对弧火山系统火山活动如何响应地表负荷突然变化的理解。

To investigate how edifice destruction impacts magma system evolution.Sector collapses are among the largest volume events to affect volcanic systems, and there is growing evidence that associated changes in surface loading can have profound effects on the stability of an underlying magma reservoir, manifested through shifts in eruption rate or composition and dominant eruptive behaviour. However, a detailed understanding of how magma systems are perturbed by destructive events is lacking, because of the challenges involved in generating high resolution reconstructions of past eruptive activity that span pre- and post-collapse periods. This project will take advantage of two unique datasets to address this problem: marine sediment samples collected offshore Ritter Island (Papua New Guinea) and samples related to the 2018 collapse of Anak Krakatau (Indonesia). There is the potential to add to these with further datasets to assess longer timescales, including material samples offshore Montserrat. These datasets preserve a record of activity before and after major collapses, and can advance our understanding of how volcanism at arc-volcanic systems responds to sudden changes in surface loading.