JpGU-AGU Joint Meeting 2026

Session information

[E] Poster

S (Solid Earth Sciences ) » S-VC Volcanology

[S-VC41] Crystal clear: petrological reconstructions of magmatic processes and histories

Thu. May 28, 2026 5:15 PM - 7:00 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

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.
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.

5:15 PM - 7:00 PM

*Chen-Chih Chung1, Yu-Ming Lai1, Huai-Yu Tang2, Hao-Yang Lee3, Yuan-Hsi Lee4, Daniel Miggins5 (1. Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan, 2. Department of Geosciences, National Taiwan University, Taipei, Taiwan, 3. Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, 4. Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi, Taiwan, 5. College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, USA)

5:15 PM - 7:00 PM

*Yuki Yasuda1, Fukashi Maeno1, Osamu Ishizuka2, Tatsuji Nishizawa3, Janvion Cevuard4, Ricardo William4, John Junior Niroa4, Mie Ichihara1 (1. Earthquake Research Institute, The University of Tokyo, 2. Geological Survey of Japan, AIST, 3. Mount Fuji Volcanic Disaster Research Center, Mount Fuji Research Institute, 4. Vanuatu Meteorology and Geohazards Department)

5:15 PM - 7:00 PM

*Kazuki Tachibana1, Andreas Auer2, Alexander Belousov3, Marina Belousova3, Hiroshi Kitagawa4, Katsura Kobayashi4 (1. Department of Geoscience, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue, Japan, 2. Department of Geoscience, Shimane University, 1060 Nishikawatsu, Matsue, Japan, 3. Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky, Russia, 4. Institute for Planetary Materials, Okayama University; Yamada 827, Misasa, Tottori, Japan)

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