Yokoyama Laboratory investigates origin and evolution of the early solar system materials by isotopic and elemental analysis of terrestrial and extraterrestrial mateterials.
● NEWS
04/01/2025 New papers have been published.
● RECENT TOPICS
Gautam, I., Yokoyama, T..,Horan, M.F., Carlson, R.W.
Five-stage multielement separation procedure: A unique and essential tool for the multi-isotopic analyses of precious (< 30 mg) extraterrestrial materials.
Geochemical Journal, DOI: 10.2343/geochemj.GJ25003, 2025.
Yokoyama, T., Dauphas, N., Fukai, R., Usui, T., Tachibana, S., Schonbachler, M., Busemann, H., Abe, M., Yada, T.
The Elemental Abundances of Ryugu: Assessment of Chemical Heterogeneities and the Nugget Effect.
Geochemical Journal, DOI: 10.2343/geochemj.GJ25002, 2025.
Masuda, Y., Schiller, M., Bizzarro, M., Yokoyama, T.
Calcium isotope evidence for the formation of early condensates in the Solar System from unmixed reservoirs with distinct nucleosynthetic origins.
Geochimica et Cosmochimica Acta, 388, 1-17, 2025.
Schonbachler, M., Fehr, M., Yokoyama, T., Gautam, I., Nakanishi, N., Haba, M.K., …, Masuda, Y., et al.
Zirconium isotope composition indicate s-process depletion in samples returned from asteroid Ryugu.
Meteoritics and Planetary Science, 60, 3-16, 2025.