4-4-4-4-4-4-4-4-4-4-4-4-4 From: "Moitra, Pranabendu - (pmoitra)" <pmoitra@xxxxxxxxxxx> Dear Colleagues, Please consider submitting your work to our session â??Understanding effusive to high intensity mafic explosive eruptions: Insights from field, experiment and modelingâ?? at IAVCEI 2023 under the theme: Using field data, geophysics, geochemistry, statistics, and modeling to probe volcanic and plutonic systems. *Description*: Unlike their silicic counterparts, mafic eruptions are more often known for being on the low end of the intensity spectrum of volcanic eruptions. Mafic volcanism ranges from voluminous effusive lava flows to mildly explosive Strombolian and Hawaiian to highly explosive Strombolian paroxysm, subplinian and Plinian style eruptions. Rapid transition in eruption dynamics is a common occurrence and poses a greater threat at volcanoes that are exploited as touristic attractions due to their usually predictable behavior. We have yet to fully understand the underlying processes driving explosive eruptions and rapid transitions in eruption styles at mafic volcanoes. How can nominally fluid, mafic magmas be fragmented enough to generate a Plinian eruptive column and/or emplace cubic kilometers of ignimbrites? Quantitative field observations along with analysis of clast microtextures provide evidence for the magmatic processes driving such variety in eruption styles. This may depend on a combination of processes such as magma vesiculation, crystallization and permeable outgassing as magma ascends in a volcanic conduit during eruption. The rheological characteristics of multiphase magma may play key roles in modulating fragmentation mechanisms, eruption frequency, and intensity. Also, bubbles in magma may form magmatic foam where the foam collapse and change in eruption intensity may be explored and monitored using geophysical techniques, such as the seismic and infrasound observations. In this session, we invite innovative and multidisciplinary contributions utilizing observational (imagery and textural analyses with an emphasis on microCT), experimental, geochemical and numerical analyses along with geophysical monitoring techniques that broadly investigate source-to-surface magma transport and emplacement with a focus on the dynamic processes that lead to the variations in eruption styles of mafic magma. The abstract submission deadline is 2 September 2022. We look forward to your contributions to our session. With best regards, Pranabendu Moitra, Olivier Bernard, Atsuko Namiki, Bruce Houghton, Melissa Drignon, Rebecca Carrey 4-4-4-4-4-4-4-4-4-4-4-4-4 ------------------------------
