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Geochemistry Lab
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A research group that analyzes meteorite and asteroid samples using isotopes to explore the origin and evolution of the Solar System.
AboutAbout the lab
Reading the beginning of the Solar System in meteorites.
The Geochemistry research group studies a wide range of fields in Earth and planetary science, using chemical clues centered on isotopes (chemical tracers).
The faculty in this group analyze meteorites and samples brought back from asteroids to clarify the origin and evolution of the Solar System.
Using electron microscopes and mass spectrometry instruments, the group examines the elemental and isotopic composition of extremely small regions.
The group also works on developing new methods and instruments for analyzing materials.
Key terms
- Isotope
- Atoms of the same element that have different numbers of neutrons in the nucleus. Differences in their ratios reveal the origin and age of a material.
- Chondrite meteorite
- A stony meteorite that contains material from when the Solar System formed about 4.6 billion years ago. It is packed with small grains called chondrules.
- Noble gas
- A gaseous element, such as helium or neon, that hardly reacts with other substances. Its isotopes provide clues to the origin and age of materials.
NewsLab news
Study reveals that the parent body of Ryugu formed more than 4.565 billion years ago (Science)
Rocks from the very earliest Solar System discovered in samples from asteroid Bennu (Nature Communications)
ResearchResearch themes
Using chemical tracers such as isotopes as its main tool, the lab covers a wide range of Earth and planetary science, from cosmochemistry to environmental chemistry. Its faculty members unravel the birth and evolution of the Solar System by analyzing extraterrestrial materials.
*Illustrative imageReconstructing the Birth of the Solar System from Meteorites
Chondrite meteorites that came from asteroids retain material from when the Solar System formed about 4.6 billion years ago. The lab examines the refractory inclusions and chondrules in them using electron microscopes and secondary ion mass spectrometry to reconstruct the environment and phenomena of that time.
*Illustrative imageExploring Extraterrestrial Materials with Noble Gas Isotopes
Using an instrument developed in-house by the group, the lab measures noble gas isotopes in tiny regions ranging from micrometer to nanometer scale. It estimates the origins and determines the ages of extraterrestrial materials, and also designs and develops new analytical methods and instruments.
MembersFaculty
- Associate ProfessorNoriyuki Kawasaki
- Assistant ProfessorKenichi Bajo
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.
- Top image: “Allende meteorite, carbonaceous chondrite ( )” James St. John / CC BY 2.0 (cropped)
- Reconstructing the Birth of the Solar System from Meteorites: “Carbonaceous chondrite (Allende Meteorite) ( Ga) 13” James St. John / CC BY 2.0 (cropped)
- Exploring Extraterrestrial Materials with Noble Gas Isotopes: “Asteroid Ryugu (ann19006a)” JAXA, University of Tokyo & collaborators / CC BY 4.0 (cropped)
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