Session Details
[S-VC41]Crystal clear: petrological reconstructions of magmatic processes and histories
Thu. May 28, 2026 10:45 AM - 12:15 PM JST
Thu. May 28, 2026 1:45 AM - 3:15 AM UTC
Thu. May 28, 2026 1:45 AM - 3:15 AM UTC
Convention Hall (CH-A) International Conference Hall, Makuhari Messe
convener:Chris Conway(Geological Survey of Japan, AIST), Kurumi Iwahashi(National Institute of Advanced Industrial Science and Technology ), Masataka Kawaguchi(Earthquake Research Institute, the University of Tokyo), Chairperson:Kawaguchi Masataka(Earthquake Research Institute, the University of Tokyo), Iwahashi Kurumi(National Institute of Advanced Industrial Science and Technology), Conway Chris(Geological Survey of Japan, AIST)
The physical and chemical characterization of crystals in igneous rocks can be used to document magma system parameters (e.g., composition, temperature, pressure, oxygen fugacity, volatile content) and processes (e.g., fractional crystallization, degassing, magma mixing, crustal assimilation). Textural and compositional variations at the scale of a single crystal, pumice clast, or stratigraphic section can reveal how such parameters and processes evolve over timescales ranging from hours to millennia. Such reconstructions provide necessary contributions to our understanding of the behaviour of volcanoes and their underlying magma reservoirs. <br/>This session will showcase research that aims to clarify the mechanisms and rates of magma generation, storage, extraction, ascent, and eruption, through the analysis of crystals and associated glasses, such as melt inclusions and embayments, in magmatic rocks. We welcome contributions from all volcano-tectonic settings that have utilized any of the following techniques: textural analysis, electron probe microanalysis, mass spectrometry; Raman and infrared spectroscopy; experimental petrology; diffusion chronometry; thermodynamic modelling.
[SVC41-06]Refining timescales of magmatic processes and volatile transfer in subvolcanic systems with 3D diffusion modeling of complex crystals★Invited Papers
Adrien Mourey1, *Euan Mutch1,2 (1.Earth Observatory of Singapore, Nanyang Technological University, 2.Asian School of the Environment, Nanyang Technological University)
[SVC41-07]Constraining pre-eruptive timescales of the 2021 Fukutoku-Oka-no-Ba eruption from magnetite and obsidian diffusion chronometry
*Taisei Ukita1,2, Kenichiro Tani2, Iona McIntosh3, Masanari Arao1, Michihiko Nakamura1 (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Department of Science, National Museum of Nature and Science, 3.Japan Agency for Marine-Earth Science and Technology (JAMSTEC))
[SVC41-08]Pre-eruptive Timescales from the Hoei Eruption (AD 1707) of Fuji Volcano, Japan
*Alexey Kotov1, Masahiko Sato1, Akira Baba2, Yujiro J. Suzuki3, Masaoki Uno4 (1.Department of Physics, Tokyo University of Science , 2.Institute of Biological Sciences at the Foot of Mt Fuji, Showa Medical University , 3.Earthquake Research Institute, University of Tokyo, 4.Department of Earth and Planetary Science, University of Tokyo)
[SVC41-09]Magma evolution during the latest Holocene activity at Mount Daisen volcano: A comprehensive analysis of phenocrysts.
*Erika Vivas1, Andreas Auer1, Mitsuru Okuno2, Satoshi Ishiga3 (1.Shimane University, 2.Osaka Metropolitan University, 3.Tottori Prefectural Geological Society)
[SVC41-10]Magma system dynamics during the AD 1741 eruptions of Oshima-Oshima volcano, SW Hokkaido, Japan
*Chris Conway1, Osamu Ishizuka1, Fukashi Maeno2, Kyoko Kataoka3 (1.Geological Survey of Japan, AIST, 2.University of Tokyo, 3.Niigata University)