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Yasuda Lab (Magma Science)
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A lab that analyzes volcanic ejecta in fine detail to understand how eruptions work.
AboutAbout the lab
Reading the story of an eruption from tiny crystals.
The Yasuda Lab studies volcanic ejecta to clarify the processes of magma eruptions.
Volcanic ejecta record the original composition of the magma and what happened between the magma chamber and the eruption.
Using instruments such as the electron probe microanalyzer (EPMA), the lab measures the structure and composition of very small areas, and uses these microscale analyses to understand the larger picture of an eruption.
Key terms
- Melt inclusion
- Magma trapped inside a crystal that has solidified into glass. It provides clues to the composition of the original magma.
- Phenocryst
- A crystal that grew large in the magma beforehand and remains as a conspicuous grain in volcanic rock.
- Magma chamber
- A place underground where magma accumulates. Magma rising from here is what erupts.
ResearchResearch themes
The lab analyzes volcanic ejecta in detail to clarify the processes from the magma source to eruption. It also aims to grasp the essence of eruption phenomena by combining a wide range of information about volcanoes.
*Illustrative imageUnraveling Eruption Processes from Volcanic Ejecta
The lab analyzes minerals, bubbles (vesicles), and melt inclusions within phenocrysts in volcanic ejecta to investigate the composition of the magma and the physical processes leading up to an eruption. It has also developed an analytical method to measure water in magma easily and accurately.
*Illustrative imageLinking Different Kinds of Volcano Information
The lab aims to build a system that supports decision-making by integrating physical and chemical information with past cases. It participates in a project that monitors volcanic eruptions in East Asia using infrared satellite images, and is in charge of tasks such as building the web-based system.
MembersFaculty
- ProfessorAtsushi YasudaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Tuff shards” Omphacite / Public domain (cropped)
- Unraveling Eruption Processes from Volcanic Ejecta: “Vapor Bubble” Johnmichael0705 / CC BY-SA 4.0 (cropped)
- Linking Different Kinds of Volcano Information: “New Eruption From Ruang Volcano (CIRA )” Himawari imagery: CSU/CIRA & JMA/JAXA / Public domain (cropped)
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