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Geochemistry Group Lab
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A group that studies materials from Earth and space using mass spectrometry.
AboutAbout the lab
Measuring elements and isotopes with high precision
The Geochemistry Group is a lab that studies meteorites, lunar samples, rocks, and sediments, using isotopes and mass spectrometry as its main tools.
The Geochemistry Division has instruments such as thermal ionization mass spectrometers for measuring isotope ratios and inductively coupled plasma mass spectrometers for measuring trace elements.
Recently, Professor Hidaka and colleagues have published results on the neutron spectrum of lunar samples, and Associate Professor Asahara and colleagues have published results on the formation age of travertine in northwestern Iran.
Anyone may visit the lab, and visitors are asked to contact the faculty members.
Key terms
- Isotope
- Atoms of the same element that differ only in the number of neutrons in the nucleus
- Mass spectrometry
- An analytical method that ionizes the atoms or molecules in a sample and separates and measures them by mass
- Travertine
- A calcareous rock formed when calcium carbonate dissolved in hot spring water or similar water precipitates
NewsLab news
Research by Professor Hidaka and colleagues on the neutron spectrum of lunar samples published in Geochimica et Cosmochimica Acta
Research by Associate Professor Asahara and colleagues on the formation age of travertine in northwestern Iran published in Radiocarbon
ResearchResearch themes
The lab analyzes the elements and isotopes contained in materials from Earth and space using mass spectrometers and other instruments. In the faculty introductions, Professor Hidaka lists cosmochemistry, isotopes, and meteorites as research keywords, and Associate Professor Asahara lists geochemistry, geochronology, and sediments, among others.
View More ↗MembersFaculty
Members of the Geochemistry Division consist of faculty, collaborating faculty, administrative staff, researchers, doctoral, master's, and undergraduate students, and research students.As of 2026
- ProfessorHiroshi Hidaka
- Associate ProfessorYoshihiro Asahara
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: “Mass-spectrometer awi hg” Hannes Grobe / CC BY-SA 2.5 (cropped)
- Related lab (Earth Evolution Group Lab): “AllendeMeteorite” H. Raab / CC BY-SA 3.0 (cropped)
- Related lab (Material Cycle Science Lab (Urumu Tsunogai)): “EA-IRMS, isotope ratio mass spectrometer with elemental analyzer for the determination of isotope ratios of stable isotopes in wines, spirits, honey and natural sweeteners, in CAFIA laboratory” Sarka Na kopci / CC BY-SA 4.0 (cropped)
- Related lab (Earth History (Nagoya University Museum) Lab): “Eurhinosaurus fossil located under the monumental staircase of the Gallery of Paleontology (French National Museum of Natural History, Paris)” Kintaro / CC BY-SA 4.0 (cropped)
- Related lab (Astrobiology Lab): “Olkhon Island, Archean rock formation, Baikal Lake, Russia” Vyacheslav Argenberg / CC BY 4.0 (cropped)
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