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Crustal Structure Lab
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The lab investigates crustal structure, centered on faults, through fieldwork and laboratory work.

AboutAbout the lab
Exploring the structure of the crust through faults
The Crustal Structure Lab studies structures of various sizes in the lithosphere, from the crust to the uppermost mantle.
Its main subject is faults.
It combines geological field surveys and seismic surveys, observation of microstructures under the microscope, rock deformation experiments, and seismic wave analysis.
The lab's faculty members study the seismological structure of island arcs and subduction zones, and the mechanisms of earthquake occurrence as seen from rock deformation experiments.
Key terms
- Lithosphere
- The hard rocky layer covering the Earth's surface, made up of the crust and the uppermost mantle
- Seismic survey
- A method of investigating underground structure from how artificially generated vibrations travel through the ground
- Subduction zone
- A place where an oceanic plate sinks beneath another plate
ResearchResearch themes
The lab studies the structure of the lithosphere (the crust to the uppermost mantle), focusing mainly on faults. It combines field surveys and observations with microscope observation, laboratory experiments, and seismic wave analysis.
View More ↗MembersFaculty
- Associate ProfessorNoriko Tsumura
- Assistant ProfessorMichiyo Sawai
VoicesStudent voices
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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: “Fault with fault breccia in interbedded metagraywacke-slate (Lake Vermilion Formation, Neoarchean, Ga; Pike River Bridge outcrop, just north of Peyla, Minnesota, USA) )” James St. John / CC BY 2.0 (cropped)
- Fault history, deep structure, and microstructure: “Fault gouge (San Andreas Fault Zone, Mecca Hills, Riverside County, California, USA) )” James St. John / CC BY 2.0 (cropped)
- Related lab (Petrology and Mineralogy Lab): “Thin section scan crossed polarizers Siilinjärvi H10” kallerna / CC BY-SA 4.0 (cropped)
- Related lab (Geophysics (Sato) Lab): “Plongée en bassin d'essais pour le test des sismomètres OBS (Ocean Bottom Seismometer) (Ifremer )” Olivier Dugornay (Ifremer) / CC BY 4.0 (cropped)
- Related lab (Geophysics (Nakanishi) Lab): “Hakuho Maru, Fremantle, 2019 (01)” Bahnfrend / CC BY-SA 4.0 (cropped)
- Related lab (Stratigraphy Lab): “Balearen, Ibiza-Westküste, Wanderung Cala Codola geologische Verwerfungen - panoramio” Gottfried Hoffmann -… / CC BY 3.0 (cropped)
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