Yokoyama Laboratory investigates origin and evolution of the early solar system materials by isotopic and elemental analysis of terrestrial and extraterrestrial mateterials.
● NEWS
07/14/2023 Two Ryugu paper have been published.
● RECENT TOPICS
Rufenacht, M., Morino, P., Lai, Y-J., Fehr, M., Haba, M.K., Schonbachler, M.
Genetic relationships of solar system bodies based on their nucleosynthetic Ti isotope compositions and sub-structures of the solar protoplanetary disk.
Nguyen, A.N., ... Gautam, I., ... Haba, M.K., ... Masuda, Y., ... Yokoyama, T., et al.
Abundant presolar grains and primordial organics preserved in carbon-rich exogenous clasts in asteroid Ryugu.
Science Advances, 9, eadh1003, 2023.
Fujiya, W., ... Gautam, I., ... Haba, M.K., ... Masuda, Y., ... Yokoyama, T., et al.
Carbonate record of the change in oxygen fugacity and gaseous species in asteroid Ryugu.
Nature Geoscience, 16, 675-682, 2023.
Piani, L., ... Gautam, I., ... Haba, M.K., ... Masuda, Y., ... Yokoyama, T., et al.
Hydrogen isotopic composition of hydrous minerals in asteroid Ryugu.
Astrophysical Journal Letters, 946, L43 (11pp), 2023.
Masuda, Y., Yokoyama, T.
Strontium isotope evidence for the repeated formation of refractory inclusions in the Allende meteorite.
Geochimical et Cosmochimica Acta, 345, 50-61, 2023. doi: 10.1016/j.gca.2023.01.024
Yokoyama, T., Ohkuma, Y., Nishikawa, K., Sumiya, K., Gautam, I.
Evaluation of the residual mass fractionation in high-precision Cr isotopic analysis with TIMS.
Geostandards and Geoanalytical Research, 47, 415-435, 2023. doi: 10.1111/ggr.12479