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

6/7/2021 Publication list has been updated

4/1/2021 Three undergrad students joined our group


Kagami, S., Yokoyama, T.

Simultaneous Determination of Insoluble Fluoride-Forming and High Field Strength Element Abundances in Rock Samples by ICP-QMS with Isotope Dilution-Internal Standardization.
Geostandards and Geoanalytical Researc, in press.

Yoshizaki, T., Ash, R.D., Lipella, M.D., Yokoyama, T., McDonough, W.F.

Variable refractory lithophile element compositions of planetary building blocks.
Geochimica et Cosmochimica Acta, in press.

Haba, M.K., Nagao, K.

Cosmogenic noble gas nuclides in zircons from the Estherville mesosiderite.
Meteoritics & Planetary Science, in press.

Haba, M.K., Lai, Y.-J., Wotzlaw, J. F., Yamaguchi, A., Lugaro, M., Schonbachler, M.

Precise initial abundance of Niobium-92 in the Solar System and implications for p-process nucleosynthesis.
Proc. Natl. Acad. Sci., 118, e2017750118, 2021.
Tokyo Tech News: Extinct Niobium Isotope Reveals the Long-Kept Secrets of the Solar System