Yokoyama Laboratory investigates origin and evolution of the early solar system materials by isotopic and elemental analysis of terrestrial and extraterrestrial mateterials.

04/02/2024 New papers have been published.

04/01/2024 New members have joined our group.


Kita, N.T., …, Gautam, I., Haba, M.K., …, Masuda, Y., Yokoyama, T., et al.

Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples.
Meteoritics and Planetary Science, xxx, in press.

Tamura, T., Yokoyama, T., Kuritani, T., Ishikawa, A.

Molybdenum isotopic compositions in volcanic rock from Northern Izu arc (Izu-Oshima, Niijima, Kozushima).
Geochemical Journal, xxx, in press.

Fujita, R., Ishikawa, A., Nakano, S., Yokoyama, T.

Determination of highly siderophile and volatile chalcophile element abundances with Os isotopic compositions of Allende meteorite reference sample using ICP-MS/MS and N-TIMS.
Geochemical Journal, 58, 9-27, 2024.

Hu, Y., Moynier, F., Dai, W., Paquet, M., Yokoyama, T.., ... Gautam, I., ... Haba, M.K., ... Masuda, Y., ..., et al.

Pervasive aqueous alteration in the early Solar System revealed by potassium isotopic variations in Ryugu samples and carbonaceous chondrites.
Icarus, 489, 115884, 2023.

Bizzarro, M., Schiller, M., Yokoyama, T.., ... Gautam, I., ... Haba, M.K., ... Masuda, Y., ..., et al.

The magnesium isotope composition of samples returned from asteroid Ryugu.
Astophys. J. Lett., 958, L25 (9pp), 2023.

Yokoyama, T.., Wadhwa, M., Iizuka, T., ... Gautam, I., ... Masuda, Y., Haba, M.K., ..., et al.

Water circulation in Ryugu asteroid affected the distribution of nucleosynthetic isotope anomalies in returned sample.
Science Advances, 9, eadi7048, 2023.